How to plant bulbous and rhizome irises in spring

 How to plant bulbous and rhizome irises in spring

The name of the iris comes from the Greek ἶρῐς - rainbow. Perennial plants with flowers of different sizes and colors (from white to deep purple) adorn summer cottages. Irises grow in one place for five to seven years, and then they need to be updated. You can plant these flowers in autumn and spring. The correct planting time is an important prerequisite for luxurious flowering and overall plant health.

When is it better to plant bulbous and rhizome irises in spring

The standard planting time for irises, which bloom from early May to late June (some species may re-bloom in August), is early fall, after a dormant period. But sometimes there is a need to plant perennials in the spring:

  • for example, in the northern regions, rhizomes or iris bulbs planted in autumn may not take root and will be pushed to the surface with alternating frosts and thaws;
  • in winter and spring, there is an opportunity to slowly pick up planting material, especially rare bulbous varieties. At the same time, it is impossible to immediately plant the purchased bulbs, it is imperative to "simulate" the wintering period, that is, put them on the lower shelf of the refrigerator for at least 2 weeks.

    Iris bulbs purchased in winter or early spring must be kept in the refrigerator for at least two weeks.

Flowers planted in the spring, subject to the necessary conditions, will take root, but they will bloom only the next year.

Video: how to save irises before planting if they are bought too early

Some growers divide and plant rhizome irises in May, right during their flowering period, so as not to be mistaken with the variety and color.

To determine the planting time, you need to take into account the region where irises are grown: in the more southern ones, you can plant the seed in April, and in the northern ones - at the beginning of May. The main thing is that the ground is free of snow and warms up to a temperature of + 10 ° C at a depth of 10 cm. If the soil is cold, the rhizomes and bulbs may freeze or even rot. However, irises can withstand short return frosts down to –5 ° C, but it is better to cover the ground around the planted flowers with black spunbond.

To protect newly planted irises from freezing, at sub-zero temperatures they are covered with black spunbond

Experienced flower growers speak differently about the spring planting of irises.

It is necessary to take into account the type of iris, each of which has its own terms and characteristics:

  • bulbous irises must be prepared in the fall by digging the bulbs after flowering, drying thoroughly, holding them in a cool dry place until autumn and putting them for winter storage in the lower compartment of the refrigerator (in a vegetable drawer);
  • rhizome irises can be dug up, divided into a cut and planted immediately as soon as the ground warms up;

    Rhizome irises can be planted immediately after dividing the old bush.

  • Siberian irises are recommended to be planted and replanted in the spring (especially in the northern regions) as soon as the snow melts, and in the south it is better to plant them in the fall.

Selecting and preparing a landing site

Irises love light, slightly alkaline soils. If the acidity of the soil is increased on the site, dolomite flour should be added (500 g per 1 m2) or ash (0.5-1.5 kg per 1 m2 depending on the acidity level).

Good lighting is also important for the abundant flowering of irises. Moreover, rhizome species are more demanding for the presence of the sun, and bulbous ones will also endure light or short shading.

In an open sunny area, the decorativeness of most varieties of irises is best manifested.

Most varieties of irises do not tolerate high humidity, so it is recommended to arrange a flower bed in a high, well-ventilated place.

Some species (marsh iris), on the contrary, prefer shade and moisture, so they are planted near water bodies.

You can plant these early perennials in different ways:

  • into the pits,
  • in the trenches,
  • on flower beds,
  • in pots (medium or large).

The land needs to be fertilized in the fall: add potassium-phosphorus fertilizers (40 g of superphosphate per 1 m2) and ash (1 liter per 1 m2). If the soil is clayey, be sure to add sand (until it is loose).

If the soil on the site is clayey and acidic, when planting irises, sand and dolomite flour must be added to it

It is not worth bringing manure under irises, this flower prefers mineral fertilizers to organic matter, since too fertile soil does not allow it to retire in time after flowering and contributes to the development of diseases.

Step-by-step visual instructions for planting irises in spring

All planting material requires processing before planting in a permanent place. Bulbs and rhizomes:

  • carefully examine, remove the decayed and injured. Too long roots are cut off;
  • soaked in growth stimulants (Epin, Energen, Zircon);
  • kept in a pink solution of potassium permanganate for half an hour to protect against possible diseases.

    For better survival, you can dip the roots of irises in Kornevin

If you have few irises for planting and you do not want to throw away the damaged ones, then you can sprinkle the wounds with crushed coal with sulfur - this will save you from infection.

How to plant bulbous irises in spring

This variety of early perennials is often planted in trenches. For monocultural planting (irises only), you can place the bulbs in a bunch - this way they will look more beautiful.


  1. First, dig a trench up to 12 cm deep and up to 15 cm wide.
  2. The removed soil is mixed with sand in a ratio of 1: 1 (relevant for heavy clay soils), superphosphate and ash are added (as indicated above, if the soil was not fertilized in the fall) and a little humus.
  3. Drainage is laid at the bottom. You can use eggshells, broken slate or brick, expanded clay.

    Drainage is especially relevant when planting dwarf irises in pots.

  4. Spread the prepared soil, spill it with a slightly pink solution of potassium permanganate.
  5. The bulbs are inserted sprouting upwards to a depth of 5–7 cm (three bulb heights) and at a distance of 6–8 cm (two to three bulb widths).

    Iris bulbs are planted at a distance of about 7 cm

  6. They are covered with the same soil, tamped a little and watered (with cold water) from a watering can.

The next time planted irises will need to be watered in 3-4 days.

Features of planting rhizome irises in spring

The planting of such irises is carried out in the pits. They can also be planted close to each other if necessary.


  1. Dig holes up to 15 cm deep at a distance of 15 × 50 cm (depending on the type of iris: dwarf ones are placed closer, high ones - farther) from each other.
  2. From the excavated soil, prepare the same soil as for bulbous irises.
  3. In the center of the hole, a low mound is made, watered with a pink solution of potassium permanganate.
  4. The roots of the flower are straightened, the central one is placed on a mound, and the lateral ones are at the edges.

    When planting rhizome iris, you need to make a mound and place the central root in the middle, and the side ones along the edges

  5. Each rhizome of bearded iris is laid upside down by buds on a mound (depth - 3-5 cm) and sprinkled in such a way that part of it is visible above the surface of the earth (if you leave the entire root underground, it can rot, moreover, this variety needs a lot of heat and sun, and as long as the rhizome is underground, the flower will not be laid). Non-bearded irises must be buried a few centimeters.

    Non-bearded irises are buried when planting, and the roots of bearded irises are partially left on the surface

  6. From above, the planting is mulched with sand and compacted a little.

Video: planting rhizome irises

Care of planted irises

On well-fertilized soil, young irises will not need any additional fertilizing for 2-3 years. On poor soils, fertilizers will be needed two weeks after planting - nitrophoska in an amount of 20-30 g per 1 m2.

Watering irises is carried out once a week under the root of the watering can, so as not to erode the soil near the stems. When flowering begins, the plants will need more water - up to 3 times a week.

Freshly planted irises are watered carefully so as not to blur the soil around the roots.

Weeding and loosening must be done very carefully, taking care not to damage the bulbs and rhizomes.

Despite the fact that irises are usually planted in late summer or autumn, spring planting is possible if you know its features and conditions for the different species of these magnificent early perennials. Let the plants not bloom in the year of planting, but over the summer they will root well, get stronger and next spring they will delight with luxurious flowering and delicate aroma.

Iris (iris) Siberian: how to plant, reproduction, wintering

Planting and caring for Siberian iris outdoors is not very difficult. Plants are usually planted in early autumn so that they have time to take root before the first frost. The basic rule of care is regular but moderate watering. It is enough to apply top dressing up to three times per season. This will ensure long lasting and vibrant flowering.

  1. Reproduction of Siberian iris
  2. Growing Siberian iris from seeds
  3. Rhizome division
  4. Planting and caring for Siberian iris in the open field
  5. When to plant Siberian iris
  6. Growing conditions
  7. How to plant Siberian iris in the spring
  8. Follow-up care
  9. When to transplant Siberian iris
  10. Siberian iris wintering
  11. Diseases and pests
  12. Siberian irises in garden landscape design
  13. Conclusion

Soil preparation: drainage and feeding

Basically irises do not create any special problems in growing, however, they still have their own preferences, which the summer resident should not forget about, who decides to acquire these flowers on his site. It will be difficult for you to grow irises under the following conditions:

  • waterlogged soil
  • mineral-poor soil
  • constant shadow.

So that excessive waterlogging does not cause you problems in the process of growing irises, it is recommended to place them on an artificially created slope. If in the selected area the groundwater is quite close to the surface and creates a danger for the roots, then a small elevation with a slope to the south and the manufacture of a drainage system would be a good solution. This can be done by raising the flower bed 20 cm and creating conditions for the natural drainage of rainwater.

Irises are light-loving plants, however, abundant lighting throughout the day is contraindicated for them, so it is best if they are in the shade for some time. This condition can be met if you choose a plot for the flower garden that will have partial shading. Before transplanting to the selected area of ​​the plant, organic fertilizers must be applied to the soil, and then carefully dig up and loosen the ground. If you want to fertilize the land with manure, then you need to apply it much earlier, about a year before planting.

Bulbous plants grow best on limestone soil. You can change its reaction to the required one if fertilizers such as lime, chalk or eggshells are added during digging. When preparing sandy soil for planting irises, it is recommended to add humus to it, which is also useful to supplement with ash or 40 gr. superphosphate per 1 sq. m... On clay soils, coarse sand, as well as a small amount of humus or compost, will not be superfluous.

Blue irises can grow in one place for no more than 10 years. For hybrid varieties, the maximum growing period is 5 years. Considering that irises tend to grow rather quickly, the problem of a lack of nutrients in the soil becomes urgent. This is precisely why you have to choose new places to grow these flowers from time to time.

For planting, it is recommended to select zoned peach varieties that have a sufficient level of winter hardiness for the selected region. Moreover, the tree should not be more than two years old, since it is at this age that the seedlings are minimally stressed when planting. You should also pay attention to the following criteria when choosing a peach seedling:

  • the height of the seedling should not exceed 1.5 m, otherwise this is a sign of excessive feeding with nitrogen fertilizers, which negatively affects the immunity of the crop
  • the root system must be sufficiently developed, that is, in addition to the main root, there must be 2-3 lateral
  • in addition, they must be fibrous (fibrous is the quality and type of rootstock)
  • the place of grafting must be clearly expressed on the trunk, which confirms the grade of the tree
  • there should be no obvious signs of violation of its integrity on the bark.

Worth knowing! Until the moment of planting, the peach should be in a dormant stage, that is, it should not have any signs of the beginning of the growing season.

Iris care - basics and secrets

According to experienced flower growers, irises are strong and viable plants that grow and bloom well without fertilization. However, in the third year of life, it is recommended to pamper the flower with a step-by-step complex feeding - in the spring, during the budding period and after flowering. In response to care, the plant will become stronger and stronger, it will grow faster and bloom more abundantly.

  • top dressing in a ratio of 2: 1: 1 - nitrogen, phosphorus and potassium
  • watering depending on the surrounding weather conditions.

During the budding period, fertilizing should be carried out at a ratio of 3: 1: 3 - nitrogen, phosphorus, potassium. In this case, watering and spraying are carried out as needed. A month after the end of flowering, it is recommended to apply top dressing in a 1: 1 ratio - phosphorus plus potassium. In the autumn, before wintering, dry mineral fertilizer should be applied in a tablespoon, scattering it under each root of the plant.

Irises should be watered at the root when the soil around the bush is completely dry. After planting, the plant is watered only three days later.

How to feed irises in spring:

  • if a lack of minerals is noticed, then mineral dressing should be applied personally for each bush
  • in early spring, a complex nitrogen-potassium-phosphorus fertilizer for flowers is useful for a plant.

Prevention of diseases and pests includes sanitary pruning of dead plant parts, timely removal of wilted flower stalks, regular spraying and shower, cleaning the beds from fallen leaves. In the open field, the planting of irises is weeded by hand, the soil is loosened with care and watered as needed. Before winter, the rhizomes are sprinkled with earth and covered, since they are located close to the surface itself and can freeze.

Features of planting irises: when, where and how

Last update Oct 29, 2019

I took out a few delots of long-desired irises with beautiful coloring, however, it's almost winter already on our street. Tell me how to plant irises correctly and is it possible to temporarily (until spring) put them in pots?

Even on a combined flower bed, irises are always the first to catch the eye, and even when they grow in separate compositions, it is difficult to take your eyes off these handsome men. Narrow tall leaves, long peduncles, large chic inflorescences with a wide variety of colors will become a real decoration of the site. In addition, these perennial flowers do not require constant attention: they grow in one place for up to 5 years, and some varieties - twice as long. Let's talk about how to plant irises correctly so that they retain their decorative effect for a long time and decorate the flower bed. Read: When can you transplant irises in the spring?

When to plant?

You can start planting irises:

  1. In summer... If the planting material (cut, layering or fan) is taken from adult bushes, this should be done two weeks after the end of their flowering.At this time, new links have already formed on the rhizomes, but their roots themselves are in the initial stage, and the flower buds have not yet tied.
  2. In autumn... It is necessary to finish planting no later than mid-September so that the irises have time to take root before the first frost. The planting material should have already formed flower buds and a developed root system.
  3. In the spring... The planting of irises begins in late April - early May, when the ground warms up well.

Most often, irises are propagated after flowering ends or in autumn - this is how young plants manage to take root and get stronger before the onset of winter, and bloom in the next season.

If the iris was received in late autumn, it must be planted in a pot and put in a cellar for the winter. Such a plant is planted on a flower bed in spring.

Where to plant?

For irises, it is necessary to choose a well-lit place where stagnation of water is excluded. Draft areas should also be avoided.

Perennials grow well in almost any soil, but they prefer fertile soil. Heavy clay soils are not very suitable for growing such plants.

Heavy soil should be diluted with peat and sand, light sandy soil should be added with clay soil, and poor soil should be enriched with organic matter a year before planting irises, additionally adding mineral fertilizers during planting. The alkaline earth is limed.

How to plant?

To plant the iris, you need to dig a shallow hole and put a small mound in its center. Set the iris on a mound, straighten the rhizomes so that they are evenly located on the sides of the elevation. The top should remain above the soil surface to keep the plant from rotting. When planting bulbous irises, the bulb should be buried two times.

The exception is bearded irises - they are buried a couple of centimeters, additionally mulched from above.

Choosing and planting irises correctly - video

Choosing a place and soil for rhizome irises

Any gardener and summer resident can create a wonderful iridarium in the garden. If you wish, you can create lush and picturesque flower beds. However, in order to achieve a positive result, it is necessary to initially select a suitable place and soil for planting rhizome irises.

Irises can be characterized as light-loving and heat-loving plants. Therefore, the growing site must be well lit by the sun, be warm.

Plants do not tolerate waterlogging. Therefore, when choosing a place, you should avoid lowlands in which moisture accumulates, areas with a high occurrence of groundwater, and moisture-loving crops that need frequent watering. With an excess of moisture, the roots of the plant can rot and the irises will die.

Rhizome irises are unpretentious to soils. Except for some points. It is highly undesirable to plant a flower crop in areas with a high content of organic fertilizers. Also, you should not plant plants on heavy, clayey soils (and if there is such land on the site you like, then you can simply improve its structure, but more on that below). In addition, for a successful and beautiful flowering, the soil must have a neutral reaction.

Thus, rhizome irises are most comfortable on nutritious, light, air- and permeable soil.

How to prepare the site and soil for planting irises

If you have chosen an ideal location for growing a flower crop, but the soil is not suitable, then you can simply follow some procedures. Site preparation is performed 1 month or 2-3 weeks before planting irises.

If the soil is heavy, dense, clayey, then you can preferably dig it up with the addition of sand and preferably non-acidic peat (one bucket of peat and sand per 1 square meter).

If the groundwater is high on the site, then drainage should be done at the bottom of the planting pit. With a strong waterlogged area, you can dig a hole 20-30 cm deep, put drainage 10-15 cm thick, and make high ridges (about 30-40 cm high). Broken brick, crushed stone, expanded clay can be used as drainage.

If the soil is poor then when digging, you can add mineral fertilizers. When planting in late summer or autumn, you can fertilize, for example, add superphosphate (phosphorus), potassium sulfate (potassium). If you plant (or transplant) in the spring, then in addition to the listed fertilizers, you can add urea (nitrogen). Or, the easiest way is to immediately add Nitroammofosk. Fertilizers are applied to the soil in the instructions.

On acidic soil, irises bloom weakly (or there is no bloom at all). Therefore, it is imperative to deoxidize the site. For example, add wood ash or dolomite flour (200 g per square meter).

Iris cutting rules

Cut bulbous irises last much longer than conventional irises. The term can be extended if you use settled water without chlorine, rainwater is an excellent solution.

  • This can be a specialized formulation purchased from a store, or regular sugar (3 teaspoons per 2 liters).
  • Top dressing will allow the flowers to fully open, and they will last longer.

An oblique cut of the stem must be done under water so as not to block the access to moisture. In water, the stem is cut several more times or pierced with a pin. The solution in the vase must be changed at least once every 3 days. As a result, it will be possible to provide plants with a long life and an excellent appearance.

Bulbous types of irises are becoming more and more popular: they attract flower growers with graceful buds and beautiful leaves, in addition, they are quite unpretentious plants.

If you decide to decorate the site with an exquisite flower bed with colorful petals, Dutch iris may be the best option. It is not difficult to look after him, and he will repay all worries with friendly flowering and magnificent buds.

More information can be found in the video.