Althéa: planting, pruning and maintenance advice

Althea, also known as hibiscus or tree mallow, is a very ornamental shrub.

In summary, what you need to know is:

Name  : Hibiscus syriacus
Family  Malvaceae
Type  : Shrub

Height
 1 to 4 m
Exhibition  : Sunny and semi-shade

Foliage  Null and void –  Flowering  June to November

Maintenance, from planting to flowering, watering and pruning, is easy and will give beautiful flowers to your althéas.

Planting Althea

Whether in a pot on a balcony or terrace, or in the garden, Althea deserves the utmost care when planting to ensure its growth and beautiful flowering.

Althea in a pot :

Throughout the year, the shrub should be planted in a special soil for flowering plants, planting or universal.

  • Althea needs a pot large enough to grow with the seasons.
  • A bed of gravel or clay balls at the bottom of the pot will facilitate good drainage so that the roots do not stagnate in the water.
  • The pot must be drilled at the bottom.
  • Repotting in the spring and every 2-3 years at most in a slightly larger diameter pot.

Althea in the earth  :

Prefer a plantation in the autumn or in the spring if the shrub is sold in a pot or container.

  • Prefer a place sheltered from the wind and above all well sunny.
  • Regular watering in the first year after planting is important for Althea.
  • Follow our advice to shrub planting .

Multiplication of Althea :

Cutting is easy to achieve in the spring with Althea.

You can also simply put stems pruned in the spring directly into a vase of water and plant them as soon as a few roots appear.

Althea size

The pruning of the altha takes place preferably at the beginning of spring to February-March so as not to jeopardize the summer bloom.

Althea flowers on the current year’s shoots, which also allows you to prune your Althea every year.

However, avoid pruning too late in the season, as this may alter the flowering.

  • Remove all twigs growing inwards to give the shrub more light.
  • Cut off about 2/3 of the remaining stems, just above an outward facing bud.

About Althea

Althea, also known as Tree mallow is certainly one of the most beautiful flowering shrubs for a garden but also for a terrace or balcony.

Although this shrub prefers warmth, some species such as the hibiscus   syriacus are perfectly adapted to warmer climates .

The many species it contains are as many colours and shapes, each one more beautiful than the next.

In hedges, in clumps or isolated, the Althea will fill you with the beauty of its flowers.

The flowering is also generous and is constantly renewed from July to October and November when the climate remains mild.

A wintering veil is recommended from November if you are afraid of frost!