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Using Sponges For Seed Growing – How To Plant Seeds In A Sponge

Using Sponges For Seed Growing – How To Plant Seeds In A Sponge


By: Mary Ellen Ellis

Starting seeds in sponges is a neat trick that is not difficult to do. Try starting plants with small seeds on a simple kitchen sponge as a fun project with the kids or just to try something new.

Why Start Seeds on Sponges?

While the traditional way to start seeds is to use soil, there are some good reasons to use sponges for seed growing:

  • You don’t need messy soil.
  • You can watch the seeds grow and roots develop.
  • Sponge seed germination happens rapidly.
  • It’s easy to sprout a lot of seeds in a small space.
  • The sponges can be reused if seeds turn out to be unviable.
  • It makes a great experiment for children.

Here are some great plant choices for seed rowing on sponges:

  • Lettuce
  • Watercress
  • Carrots
  • Mustard
  • Radish
  • Herbs
  • Tomatoes

How to Plant Seeds in a Sponge

First, start with sponges that have not been treated with anything, like detergent or antibacterial compounds. You may want to treat the sponges with diluted bleach to prevent mold growth, but rinse them thoroughly if you do. Use the sponges whole or cut them into smaller squares. Soak the sponges in water and place them in a shallow tray.

There are a couple of strategies for putting the seeds in the sponges: you can either press small seeds into the many nooks and crannies, or you can cut a larger hole in the center of each sponge for a single seed. Cover the tray in plastic wrap and put it in a warm location.

Check under the plastic wrap occasionally to be sure there is no mold growing and that the sponges have not dried out. Give the sponges a regular mist of water to keep them moist but not soaking wet.

To transplant your sprouted seedlings, either remove them entirely and place in a pot or outdoor bed when ready or trim the sponge down and plant the roots with the remaining sponge still attached to them. The latter is useful if the roots are too delicate and can’t be easily removed from the sponge.

Once they’re big enough, you can use sponge-grown seedlings as you would any seeds you started in soil.

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Can You Grow Plants In A Sponge? (Don’t Forget This Step)

Maybe you want to start seeds indoors without using soil, or maybe you just want to grow microgreens for fresh eating. Either way, you might be wondering how a sponge would work for growing plants from seeds.

So, can you grow plants in a sponge? You can grow plants in a sponge. As long as you keep the sponge wet, the seeds should germinate if the temperature is warm enough. To grow the seedlings further, you will need to either transplant them into soil or a hydroponic system.

Of course, the time that seeds in a sponge need to sprout will depend on the type of plant and the temperature.

In this article, we’ll get into the steps you should take to grow plants in a sponge. We’ll also discuss how you can ensure a good germination rate for your seeds.


Cellulose Sponges vs. rockwool vs. foamy type sponges

The following is a list of what I started:

Acer Palmatum 'atropurpureum' Rockwool 2
Acer Palmatum 'atropurpureum' Foamy Sponges 2
Amsomia Foamy Sponges 2
Amsomia Rockwool 2
Datura Lt. Blue Rockwool 4
Datura Lt. Blue Foamy Sponges 4
Datura Double Yellow Rockwool 1
Datura Double Yellow Foamy Sponges 1
Morning Glory Blue and Pink Silks Rockwool 6
Morning Glory Blue and Pink Silks Foamy Sponges 6
Morning Glory Blue and Pink Silks Cellulose Sponge 5

The daturas, acers, and amsomia have done nothing yet but the results of the morning glories is interesting.

Rockwool 5 out of 6 have germinated
cellulose 3 out of 5 have germinated
foamy 3 out of 6 have germinated
The interesting part is that the ones in rockwool are all ready larger than either of the others.
Next best is the cellulose sponges with the foamy ones coming in last.
I will post a couple photos for you to see, but so far the rockwool is definitely winning hands down.
I really wish I had some of those cocoa cube things to play with too. I just can't justify buying many more toys.
I probably will keep using the sponges, I am still happy with the results I am having, the cellulose ones do hold moisture better, so I think I will switch to those. I will save the rockwool for the things like brugs that I want to be very successful with.

These are the ones in Cellulose

Here are the foamy sponges, although there isn't much to see, I had to open a little to see that they did have roots and had started to develop.

Thanks for the report. (It looks like you have been having too much fun.)
I think I'll be getting some cellulose sponges. Looks like a really good way to start seed to go into a hydroponic system.

Much to my amazement this afternoon when I looked the sponges are trying to catch up. I don't think the foamy ones will but the cellulose might. It is incredible have fast these have sprouted. I did not nick these seeds at all and they have started much faster than the ones I did nick.
I guess thats a lesson in itself.

Alice: Thanks for starting the experiment! I have a similar one going with brug seeds. Nothing yet :(

What was the date that you planted these? I'm curious about the germination time on your MG's -- I planted 20 Heavenly Blues in RW last night. Thanks! Gretchen

Gretchen
I started everything on 1/26 and the picture thats posted is from 1/29 so you can expect some pretty fast results from the morning glories.
I should go take another picture because I am amazed that the sponges are starting to catch up, although I think the rockwool cubes are developing roots faster.
It really is fascinating, I promise some pictures later today and I will try to do some of the roots to.

I just posted this information in your thread. Not sure which thread is the most appropriate one. Here it is again.
http://www.gtghydroponics.com/faq.asp#hydtype

What are the different types of hydroponic media?

Rockwool
Rockwool is a fairly recent addition to the types of growing mediums available on the market. This sterile, porous, nondegradable medium is composed primarily of granite or limestone which is melted and spun like cotton candy. Rockwool is then formed into blocks, sheets, cubes, slabs, or flocking. Rockwool absorbs moisture without holding nutrients, and even when it is completely saturated still retains 20% air for your root system.

L.E.C.A.
L.E.C.A. stone is a type of clay which is super-fired to create a porous medium. It is also heavy enough to provide secure support for your plants' root systems. This non-degradable, sterile growing medium holds moisture, has a neutral pH, and also will wick nutrient solution to the root systems of your plants. L.E.C.A. is often the growing medium of choice of novices and professionals alike because it is easy to use.

Perlite
Perlite is primarily composed of minerals subjected to intense heat which expand and become very absorbent. This material is light, has a neutral pH, excellent wicking action, and is very porous. Perlite is used in a wide variety of hydroponic systems because of its ability to hold moisture and nutrients as well as air, and also because it is very easy to use.

Coconut Fiber
An alternative to using rockwool, Coconut fiber is the first "organic" medium to offer high performance in modern hydroponic applications. Coconut fiber can also be added into soil mixtures to increase water holding capacity. Coconut fiber holds more oxygen than rockwool and is pH neutral. Available as compressed bricks, when Coconut fiber is soaked in water it expands to 6 times its compressed size. Many growers have found that a 50/50 mix of coconut fiber and L.E.C.A is the perfect organic medium.

Thanks so much for the info, I have been looking in a catalogue that I had gotten recently trying to figure out something that would work as well as the rockwool. I don't like the feel of the rockwool (it reminds me of insulation) so it is not as user friendly for me as the sponges are. I like the sponges because I don't have to worry about cutting etc., but so far the results in the rockwool far surpass the sponges for the brugs.

Here are some silk rose morning glories after less then 48 hours in rockwool. No nicking or presoaking.

Here is my Double White Datura after 48 hours. No nicking, no pre-soak.

aknapp, I've got my cellulose sponges, did you rinse yours in bleach water same as the foam sponges?

I rinsed my sponges in a 10% bleach/water solution.

This message was edited Feb 2, 2004 2:58 PM

Here's a picture of a Pride of Barbados seedling. I planted the sponge in a 2" peat pot with a little soil a few days ago. Its doing great!

skyeblu Yes I did them the same way that I did the foamy ones.

Gretchen those look great.

I am really upset with myself. I don't think my daturas are going to do anything at all, I put them to far down and I am kicking myself for missing the part about them needing light. I am lucky I have a few more seeds so I will leave these alone and see if any of them do anything, but I will do some more the right way and see if I have the same results everyone else does.
The morning glories had to be planted last night and I was bad and did not take any pictures before I did it. The end result was that the rockwool had 5 very nice seedlings with about 1 1/2 inch roots when I moved them last night. The foamy sponges had 3 very nice seedlings with about the same amount of root on them as the rockwool. The cellulose had 2 nice sized ones, but the roots had all remained inside, so that I could not see them.
I will have to restart the datura experiment and find something else to try instead of the morning glories.
Results so far
5 out of 6 for the rockwool
3 out of 6 for the foamy sponges
2 out of 5 so far for the cellulose sponges.
I thought the way they looked the first couple days that the cellulose was going to do far better than the foam, I am surprised that it came out the way it did.
I have also had a small problem with getting things too warm the last couple days, I made some changes in the lights and put some white sheets of posterboard around the lights to help keep the light on the plants, and a couple of times when I wasn't paying as much attention as I should have been it has been 80 under the lights.
Pretty amazing for a room that has no heat.
I wish I could keep the rest of the room somewhere near that.
I hope you all are having as much fun with playing with all of the little baby plants as much as I am.
I love being able to see what is going on. Even the failures don't seem so bad when all I have lost is a few pieces of sponge.

Alice: Daturas take so long to sprout! Mine started germinating and then just stopped. It seems like just when I'm ready to give up and start over with them, they surprise me. Maybe if you pull them up a little in the sponge so they are exposed to the light. It wouldn't hurt to try. If it doesn't work, I apologize in advance for wasting your time :)

Many of the brugs I planted on 1/28 are beginning to show signs of life! About half that were in sponges were just getting ready to open, so I moved them over to the RW. It just seems a little safer to me.

I had 20 tomato seeds germinate over night in the sponge. They too have been transferred to RW. I just hate to have too much invested in the sponges until we see the long term effect.

A couple of my MG's have also sprouted :) I have a feeling that I'm going to have something to take pictures of tomorrow. Fingers are crossed. Gretchen

Thanks Gretchen I had decided to try that and then I was not sure if I was seeing any growth on them or not and I was afraid if I touched them, I would really ruin them. I have not given up on them and I intend to see if they can get by my abuse. I told them I would be really good to them if they would just forgive me my one little mistake.
I will have to hope they are more forgiving them my cats, they can hold a grudge for days when I take care of my sister-in-laws dog.
I have started a few small seeds on top of the cellulose and foam sponges and so far nothing from any of those, but some of those seeds were pretty old, so I can't really blame the method.
Its important in doing the testing to try and remember all of the little details like that so that you don't blame the method for something that isn't its fault.
When I did this experiment I nicked nothing, and yet when I did the first MG's in the sponges I nicked them and all but one germinated very rapidly. So we also have to take that into account.
It is really mind boggling.
I probably need to go get my mad scientist outfit on again, I am starting to think to much.
Hoping for your pictures if not tomorrow by the next day I bet.

here's my little mg coming to life.

The minute they sprout they take off so fast that its incredible. You will have a good time watching those for the next few days. They are fascinating.

Oh, I can barely keep my hands off them as it is. I guess I didn't mention here, that my very first ever brug seed sprouted tonight. This is just too much fun :-)

Gretch I just posted on the other forum after you did, we have got to quit meeting like this. People will talk.

RW has been around for over 30 years. I have a friend that used it 20 some years ago.
As if we don't have enough. MORE INFO ! ! . LOLOL
http://www.bhocenter.com/rockwool/rw.html

LECA is a stone (pebble), will not be applicable for starting seeds :-(
§

Datura seeds needs warm weather to germinate properly. i normally plant them in the month of May or June in my area. if u want to have a headstart, u need to use heating mat. othrwise u are depeating ur purpose and seed rot as a result. just my 2 cents worth.

Thanks Mavie
I had them on heat and had to take them off because after I moved lights around they were at 80 degrees and I started to get worried that I would fry them.

I think maybe its time to get a temperature control for my heating pads I had just been trying to get by without the expense.

Alice, do you plant sponge and all after they have germinated and are growing?

Darius
I have done it both ways, some things were not at all attached to the sponges and those I took off, the others I have just put in sponge and all.
When I get ready to put everything into bigger pots it will be interesting to see what is going on where the sponges are concerned.
My thinking is still that the roots will eventually just push the sponges or rockwool out of their way.
I won't have any conclusions for sure until the plants get bigger.


Planting tomato seeds in bio sponges from park seed co.

i just ordered 2 18 cell planting blocks along with the 36 "whopper" sponges from parks. these sponges are supposed to take the place of seed starting soil. garden glory from DG says she loves them. before i ordered them i talked with someone from parks and asked about how i would go about repotting my plants. they told me it is not recommended because of the way the spong is designed. they told me that when the seedling first emerges from gthe sponge to cut offthe top and that would be the same as repotting. has anyhone ever heard of this method or has anyone besides garden gloy used thse sponges. also, do you think that this method would work on other vegetable besides tomatoes??

would appreciate your input. thanks

I used 'em about 5 years ago when they first came out (or thereabouts). Didn't "cut off top". of what? Just planted the sponge. Not as happy with them as I am with the X-tra-depth Jiffy-seven pellets (from which I peel the net, gently, or they root-bind). They control seeds, in the X-D Jiffies, were much more vigorous, rooted out better -- determined when I pulled them at year's end. But -- I evidently used them incorrectly -- didn't "cut off top" -- how would you do that?

I have had good success with them in hydroponics. As soon as I see roots coming out of the sponge they go directly into the system. No cutting anything, just plant as is. The only reason that I use them is that I don’t have to wash the dirt off the roots to plant them in my system.
Oldude

I just got my sponge order about five minutes ago. Im raring to go, but must admit, have never tried the tomatoes. Im going to plant enough to try the topping method. keep a few 'just in case' .

Frankly, in those whopper sponges, you can get a plant about as big as in a gallon size pot, so worst that can happen is you just plant some deep as always. I so hope they work, I have had good luck with them, I know boca bob swore by them, but I think he is selling something that uses coconut coir now. Love the coir, still doesnt hold the plant up at transplanting tho. If I say this one more time, somebody is probably going to come down here and slap me, but its not the sprouting of the seed that is so great in the sponges, lots of things are good sprouters. its the strong root system that has had the freedom to grow down down down. and even more importantly for me. its the transplanting. The transplanting is where I loose most seedlings. these just hold the plant perfect while it gets happy.

Maybe we are talking about different products. Do the park seed sponges compare to these?
Oldude

they are identical it seems. the cells system is different, but the sponges are the same. looks like they come in the same gallon zip lock baggie too. they only have the smaller sizes. but yep. those are them.

I'm also confused by that advice. I used to grow all my tomato seeds in the Park's sponges. After they were about an inch or two I transplanted them into 4-5" pots half way down. As they grew I added more potting mix. Never did any cutting off of anything. When it was warm enough outside I planted the seedlings into the garden. By then the root system was quite extensive.

Do you think they mean to cut the bottom off of the sponge, leaving the top with the plant?

I would ignore any instructions to cut things off. If you cut off the bottom of the sponge you are cutting off the root system.

i am positive that they told me to cut the top of the seedling off as it emerges frm the sponge.
what i wanted to accomplish was to plant a seed in each sponge (i wouldn't have to fool around with seed starting material) and then let it grow until it was time to put them out into my 5 gallon containers. i am gloingto give them anolthe call later today and ask them gain.

If you cut the top of the seedling off you've ruined the plant forever, especially with determinate varieties.

So it makes no sense to me at all.

Actually, I'm having trouble seeing what the advantage is of sponge growing as compared to conventional less expensive ways of germinating seeds and growing seedlings.

The advantage is, for me. I dont have to buy my plants from Daryl anymore -x.

I had almost given up on gardening, except what I could buy at HD until I found these sponges. I will admit to just starting testing the tomatoes, but boy has it made gardening fun again for me. For the first time EVER. I can not only sprout a seedling, I can actually get it moved to the garden and get flowers of veggies.

The advantage is, for me. I dont have to buy my plants from Daryl anymore -x.

I had almost given up on gardening, except what I could buy at HD until I found these sponges. I will admit to just starting testing the tomatoes, but boy has it made gardening fun again for me. For the first time EVER. I can not only sprout a seedling, I can actually get it moved to the garden and get flowers of veggies.

*** Well yes, I can see that being able to germinate and start your plants at home is a real plus, and Darrel's loss, LOL, but what other ways have you started seed and grown seedlings, I guess that what I'm asking.

As in why use sponges instead of germinating in artificial soil mix, transplanting when at the 1-2 leaf stage and growing them on in cells or whatever, which is what lots of us do and it works very well indeed and at lower cost I would imagine that sponge bob stuff.

BTW, who or what is sponge bob? That just came into my head unannounced. LOL

The advantage to the sponges is they are less messy than mix and they hold water well as they soak it up from the bottom "like a sponge"! Once the seeds germinate (which they do fairly easily) they can be transferred to a pot without damaging the root system. The pots have to be deep enough to cover the whole sponge. That makes for more work but at least you don't damage the root.
I used the sponges for many types of seeds including eggplants and peppers, flowers like columbine, tithonia, four o'clocks, morning glories, etc - anything you want. I can see why someone would say they make gardening more fun. Success in the garden always makes it more "fun"!! So, Herbie, enjoy your sponges and experiment with different veggies and flowers.

The reason I stopped using the sponges was that I was always finding them in the garden the next season plus the cost. Eventually they do biodegrade. What I do love and use every year are the sturdy green trays the system comes with. I fill a whole tray with potting mix and start my basil in that. The tray is deeper than most trays so is also good for holding my toilet paper roll pots as well!

Now I start those seeds on damp paper towels wrapped in plastic then transfer them to toilet paper or Bounty cardboard rolls filled with potting mix once they germinate and produce a decent root with the first two leaves. I cut the toilet paper roll in half to make two "pots", the Bounty makes 5-6 "pots". These are placed on a roast chicken tray from the supermarket (I'll recycle anything!) and put under lights. The rolls can be planted directly into the soil when the seedlings are large enough where they biodegrade. So that is another way to save money if you don't want to order plants or spend the money for sponges.

Don't worry, Carolyn, Darrel will gain a new customer this year since I don't have time in the spring to start my own!! LOL

Herbie, I have used the sponges , both sizes for several years now and for me they work very well. But I can't say that my plants looked quite as good as your do. They are fine until after I transplant them into pots of soil, usually 4" pots. I do have some that are larger and deeper, pots that is.
Donna

If the roots stay intact when put in the pots for seedling growth, then you're getting a tap root structure and not the desired Fibrous root Structure.

And that's why so many folks make sure that they transplant the small seedlings and transfer them to cells or pots, not just b'c it gives a fibrous root structure, but also b/c when you shock the root by tranplanting it sets the plant back a bit and allows for a better root structure at the expense of too much foliage too quickly.

Thanks Carolyn, I needed to be reminded about the fibrous root thing. I won't be planting tomato seeds for some time yet. I was hoping to find seeds listed in Totally Tomatoes for Paul Robeson, but they don't have them.

Hey guys, I found this on a random web page and think it might answer the question ya'll have about the cutting off of the 1/3.

I never really analyzed the root structure of my plants in the sponges but I believe the roots spread out all throughout the sponges so that it wasn't really a taproot structure. When they were transplanted to the larger pots the roots just continued to spread out. After being planted out in the garden or EB they always seemed to do fine. At the end of the summer the sponge was basically hidden in amongst the root system which I guess I could describe as "fibrous". The sponges never seemed to inhibit the growth of the roots on the peppers, eggplants, or tomatoes.

for over 20 years i have started my seeds ujsing 2 inch containers filled with seed starting mix and then going through the various reppotting stages. i have never had any trouble doing it that way. i wanted to try these sponges
because i figured it was easier and less time consuming. i only grow a very limited about of vegetables so growing them the old way was notg a problem but olnce in a while i like to try new things.

what i have decided to do is go both ways. i will plant some of my red penna seeds the old way and the rest of them using the sponges. i will also do that for the rest of my vegetable plants. this way i will see what works better.

carolyn - boco bob is a DG'er who sells coir and seed starting kits on the marketplace forum. by the way, i'm not going to cut off the top of my seedlings like the parks people suggested.

Carolyn's link on tomato root structure convinced me that transplanting tomato seedlings is needed and I do it every year.

However, I buy cloned dahlia seedling which are grown in a Park's type sponge and the results are terrific. When I first saw them I thought, "how can those pea size tubers on those tiny plants do better than a full size tuber stuck in the dirt?" Well, they do. I probably gained two weeks on the season by using sponge grown clones.

The important thing is that each person be comfortable with the method(s) that they're using.

I guess my only concern is that so many folks tend to make gardening in general, and growing tomatoes, specfically, more complicated than I'm accustomed to.

When I look at the amount of amendments some folks put in the planting hole or in a container, or what they spread around in the garden in general it truly does amaze me sometimes.

Gardening for most backyard home growers should be fun, and fun for many of us is to keep things simple.

When I look in the various catalogs that I get and see all the "kits" that are sold and all the dubious claims that are made for this and that, and I could name them, but won't, LOL, I truly am concerned.

Many of them cost a lot of money and I suppse if one isn't cash strapped in this current economic environment then it's really none of my business what folks try out, or do.

So, as I said above, as long as a person is comfortable with what they're doing and the results are fine for that person, then go to it. ( smile)

My extra 2 pennies: I just bought my very first daylilies this past spring, from Park's. I either never got, or lost, the instruction paper(s). So I called, and was told to store them in the closet until planting time.

Good thing I don't take instruction well. I threw them in the extra refrigerator, along with other bulbs/tubers. Later, went online for storage instructions. Despite the lady at Park's on the telephone, the Park's instructions said store 'em in the 'fridge.

i have used the Park's sponges in their 60 cell seed starting kits for several years on my tomatoes and peppers and found them to work very well. When the seedlings get their first two true leaves they are transplanted to 3" peat pots and kept under lights until ready to harden off and plant in the garden. The top of the sponge needs to be covered with soil to prevent loss of moisture.

The Parks system is clean, convienent and watering the seedlings is simple--you don't have to guess if they need water because the sponges absorb just what is needed.

I'm keeping an eye on this thread as I ordered mine the other day. I'm a bit concerned that it stated they won't be shipped out until the middle of January. It I don't get mine in time for seed starting, I will have to cancil my order. Hopefully there will be no probelms. :)

101 - that's the problem with being in a "nice" spot: shipments for plants start end of March or so -- 'taters not til March, etc. That's why Phoenicians are so good at seed starting. They GOTTA be!

susan - when i tgalked to the people at parks a few days ago they told me that they are in the middle of inventory and my order would not leave their plant for alother week or two. it's fine with me. i can wait.

Well, I've looked at the calendar, and I'll be starting my seeds on Feb 9th. We'll see. :) If I don't hear soon, I'll give them a call and see what they're expected mail-out date is. Maybe I can use them for some later varieties. I've not given up yet.

slatwood, I *did have that problem with potato seed in my area, also, though so you hit the nail on the head. It's difficult in the south getting the supplies you need. The box stores will have racks and racks of seeds but not the supplies you need for starting them in time. :-( Go figure! LOL

Although I haven't used the sponges, I have used an earlier version, their "Park-Starts" which have 2.5 inch cylindrical sponges about 1/2 inch in diameter. They worked fine for marigolds, but tomatoes outgrew them pretty fast. I have been experimenting with Rootrainers (TM) lately for tomatoes. It's fun to open them up and peek at the roots to see when to transplant up into big pots.
They are available from Parks, though I got mine from the Canadian suppliers:
http://www.beaverplastics.com/beavercurrent/rootrainer.html

don - i remember seeing those rootrainers in parks but did not pay much attentino to them. now that you put up that site and i checkit i immediately called parks to see if i could cancel my order forthe psonges and change it to the rootrainers. they said because it's sunday they have problems getting to speak to someone in the plant where the merchandise is shipped but to call on monday even though they said it might be to late. they did tell me that when i get the order i could return it for a refund. i like the looks of the rootrainers and it can be used over and over again. i know i wanted to make things easier for myself with the sponges but i keep thinking about repotting and the more i do thnk about it the more i don't think the sponges will work out for me. thanks for that posting.

don - do you happen to know the price of the rootrainer from beaver plastics in canada?? triedto call them but they are closed on sundays.

Herbie have you looked yet at Boca Bob' coconut coir seed starting system? I chose it after looking at all the others and am really excited about it.


How to Plant Seeds in a Sponge

First, begin with sponges that have actually not been treated with anything, like cleaning agent or anti-bacterial substances. You might intend to deal with the sponges with watered down bleach to stop mold and mildew development, yet wash them extensively if you do. Utilize the sponges entire or reduce them right into smaller sized squares. Saturate the sponges in water and also position them in a superficial tray.

There are a number of techniques for placing the seeds in the sponges: you can either push little seeds right into the lots of spaces and also crannies, or you can reduce a bigger opening in the facility of each sponge for a solitary seed. Cover the tray in cling wrap and also placed it in a cozy place.

Check under the cling wrap sometimes to make sure there is no mold and mildew expanding which the sponges have actually moist out. Offer the sponges a normal haze of water to maintain them damp yet not saturating damp.

To transplant your grown plants, either eliminate them totally and also area in a pot or outside bed when all set or cut the sponge down and also grow the origins with the staying sponge still connected to them. If the origins are also fragile and also can not be conveniently gotten rid of from the sponge, the last is helpful.

Once they’re huge sufficient, you can utilize sponge-grown plants as you would certainly any kind of seeds you began in dirt.


Watch the video: Seeding and growing vegetable on hydroponics system