Boltonia, Sow, plant, divide, cuttings, maintain

Boltonia, Sow, plant, divide, cuttings, maintain

Boltonia, a family resemblance with the large asters

Boltonia, often confused with the giant autumn aster ... But never equaled. Easy to grow, perennial, very rustic, the boltonia is an essential flower in free gardens, wild gardens, spontaneous gardens where we love the disorder erected in art where it will draw its petals from the game, cultivated in the company of tall grasses. . Boltonia likes cool soils where the plant produces, in summer until early autumn, numerous white flowers with light lilac reflections. Its thin, slender foliage is a beautiful dense bluish green. It is a creeping, fast growing plant. The boltonia gives a superb flowering on stems 2 meters high with a supple habit, the plant is more beautiful year after year. Plant it in the garden without thinking, it will work everywhere, in the background of a bed, in a country mix, in the sun or exposed in partial shade ... The flowering is such that the expression cloud of flowers sticks to the petals, a late season delight !

Botanical name:

• Boltonia Asteroides

Plant info:

• Cycle: Perennial
• Foliage: Lapsed
• Hardiness: Hardy plant (-20 ° C)
• Family: Asteraceae, asteraceae
• Harbor : Bushy
• Exhibition: Sun to partial shade
• Ground : Fresh soil
• Sowing: Early spring
• Plantation: Spring or fall
• Flowering: August to October
• Fruiting:
• Rooting: Rhizomes
• Cultivation area: See the France or Quebec hardiness map
• Origin: North America
• Honey plant: Yes
• Edible plant: No
• Poisonous Plant: No


• Flexible port
• Small flowers

What advantages in the garden:

• Easy to grow.
• Very rapid growth.
• Superb from the first year of planting, in 2 summers a cup forms a beautifully flowering bush.

What exposure for boltonia?

• Sun (not scorching) and partial shade.

What soil?

• Any fresh soil.

Method of multiplication?

• Sowing, division, cutting.

A word from the gardener:

Dividing is the easiest method and because of the plant's vigorous growth it is easy to propagate it in the garden, to share with friends or to benefit through friends.

When to divide boltonia Asteroides?

• Divisions can be produced at 2 periods : in spring, March or April.

How to divide boltonia Asteroides?

• The multiplication of boltonia by division of its strain is practiced in March or April.
• Select fragments rooted on the periphery of the tuft, the younger they will be more prompt to regrowth.
• Loosen and amend the soil in sufficient depth before transplanting.
• Keep the soil cool to help recovery, watering regularly in drought conditions.

When to cut it?

• in spring, in March April May

How to cut the boltonia?

Boltinia is propagated very easily by parboiled cuttings.
• Take a nice 10 to 15 centimeter stalk from the foot.
• Cut at an angle, 1 cm below an eye, the bevel increases the feeding capacity.
• Remove all leaves from the stem except the 3 at the end of the stem.
• Dip the beveled part in the cutting hormone powder and especially remove the excess if necessary.
• In pierced pots filled with planting soil and 30% sand.
• Prepare holes with a pencil for the number of cuttings planned. It will allow the boltinia stems to be placed without removing the cutting powder.
• Place the cuttings.
• Press the soil with your fingers against the rod (s).
• Water without too much.
• Cover the cutting with a bag (freezer type) tight with an elastic on the pot.
• Place the cuttings under cover. You can take them out as soon as the risk of frost has been removed.
• Transplant the cuttings in the ground in September.

When to plant

• In spring around March, April or May, or in autumn until October before the cold weather.

How to plant it?

• Work the soil on a good height of the spade.
• Amend the soil with a well-rotted compost, shovel it in before placing the tree.
• Also add sand to increase the draining capacity if necessary.
• Place the plant (s) in pots, 50 cm apart.
• Recap and tamp.
• Water.
• Water in case of lack of precipitation during the first weeks, Boltinia appreciates cool soils.

A word from the gardener:

If you want to plant several feet, leave about 0.5 meter between 2 feet.

Culture in pots?

• Use a large drilled container 60 cm deep.
• Fill it with a layer of gravel, then a mixture of garden soil, potting soil and 60/30% sand.
• Water regularly on dry soil.
• Choose a smaller variety (Nana).
• Place the pot on a terrace or in the garden for animated flower beds.

Interview :

Cut dry stems in autumn, after flowering has ended, without damaging recent shoots.

• Pruning to limit the height of the stems:

• It is possible to reduce the height of the boltinia without interfering with its beautiful flowering. Each year, pinch the stems when they reach 30 to 40 cm.
• It is also possible to cut the stems to 10 cm from the ground, at the end of April or May, flowering will be slightly delayed but it will be just as abundant. With this method, the plant will measure between 1 and 1.5 m.

Long-term maintenance:

• Keep the soil cool.
• Remove faded flowers.

Blooming boltonia:

• Flowering from August to October.


• Boltonia asteroides type species, 2m high, with white flowers;
• Bolt. ast. variety "latisquama", white flowers, sometimes reflective, slightly larger than those of the type species;
• Bolt. ast. "Snowbank", 1.5m high, the flowers are perfect white
• Bowl.
ast. "Pink Beauty", smaller variety, 1 m high, pink flowers.

Boltonia disease:

Unlike asters which can be susceptible to a few fungal diseases (fungi), botonia is not.
• It will still be necessary to be vigilant to attacks by molluscs and snails.

What to plant with?

• Grasses, helianthus, macleayas and summer flowering perennials

Use :

ATa garden: in young hedge, in clump, in isolated
• Without garden:
in a large 60 cm deep pot, on the terrace or in the garden.

Picture by Stickpen- public domain - on - CC BY-SA 3.0.

Quick sheet:


Item name

Sow, plant, multiply boltonia


Boltonia is an asteraceae like aster and others. These 2 plants are also very similar. The boltonia produces, from August to October, a very flowery bush, with very beautiful flowers with fine white petals, with lilac or pink glints. Easy in the garden, with rapid growth, it is an ideal plant to install in spring and which can be enjoyed as soon as summer comes ;-)!


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Species and Varieties of Anthem

Anthemis tinctoria 'E.C. Buxton '

  • Flowering: May June. Yellow flowers.
  • Height: 50В cm
  • Qualities: For thin soils.

Anthemis carpatica

  • Flowering: May to July. White flowers.
  • Height: 15В cm
  • Qualities: Gray foliage. Aromatic. Creeping plant for rockery.

Anthemis frutescens

  • Flowering: May to October. White, pink or red flowers.
  • Height: 60В cm
  • Qualities: Sensitive to freezing cold at -5В В ° C

Anthemis sancti-johannis

  • Flowering: May June. Orange flowers.
  • Height: 50В cm
  • Qualities: Your very hot.

Ginger harvest and tasting

9 to 10 months after planting, when the green parts dry out, part of the rhizomes can be dug up and used for consumption. To obtain younger and more lemony ginger, it can be harvested after only 5 or 6 months. If you want to fragment your rhizomes for planting, you must ensure that at least one bud is present on the fragment in question.

Ginger keeps quite a long time, but its flavor diminishes over time to gain in spice. It is therefore best to eat the rhizomes fresh. Renowned for its revitalizing power, it is also very good for relieving stomach aches and nausea in pregnant women (rub the root on a little bread in the morning). It is antiseptic, antibacterial, relieves headaches, rheumatism. He is a real star of Asian medicine and gastronomy!

How to maintain them?

Asters like fertilizer. Bring it to them at least once in the spring, scratching the clumps superficially so that they retain their vigor. You will use organic fertilizer. If you apply flower plant food, you will get much more vibrant flowers.

To avoid powdery mildew attacks, spray the foliage and especially make sure that the soil is always slightly damp. It is also recommended to divide the clumps every 2-3 years.

Tall species can be staked, as they are indeed sensitive to autumn rains. You can also push the branches into the ground and pinch its stems 15 cm from the ground, usually at the end of May. This helps to make the tuft more compact.

Prune the aster

You just have to cut back the stems once the flowers have faded at ground level. Before winter, it is recommended to remove all diseased leaves.

How to water the asters?

While asters in pots require regular watering to keep the substrate moist, asters in the ground are watered when the period is dry and hot and after planting.