Hibiscus Althea, a very ornamental shrub

Hibiscus althea is a very decorative shrub.

Hibiscus althea facts

Name – Hibiscus syriacus
Family – Malvaceae (mallow family)
Type – shrub

Height – 3 to 13 feet (1 to 4 m)
Exposure – full sun, part sun
Foliage – deciduous

Flowering – July to November

Caring for this plant, from planting to blooming and including watering and pruning, is easy and it will give you magnificent flowers.

Planting Hibiscus althea

For indoor hibiscus care, here is the advice to follow.

Potted outdoor hibiscus althea

All year round, the shrub must be planted in a soil mix designed for flowering plants, for planting, or any universal soil mix.

  • Repot in the spring, at least every second year, in a pot that is slightly larger than the previous.

Hibiscus althea in the open

Prefer planting in fall or spring if you have purchased the shrub in a pot or a container.

  • Choose a sun-bathed area, sheltered from stronger winds.
  • Follow our advice on planting shrubs.

Propagating hibiscus althea

Cuttings are very easy to perform in spring for hibiscus althea.

Simply keep cut stems in a vase with water, and plant as soon as a few roots appear.

Pruning hibiscus althea

Spring is when hibiscus must be pruned.

  • Remove all branches that grow inwards so that the shrub can filter light through the inside.
  • After that, cut remaining stems back by about â…”, just above an outward-facing bud.

All there is to know about the Althea hibiscus

A white and crimson hibiscus althea flower.Hibiscus althea, also called simply Althea, is very certainly one of the most beautiful flowering shrubs, and fits not only any garden well, but also terraces and balconies.

The numerous cultivars that are circulating allow for as many shapes and colors, and each is more beautiful than the next.

Even if this shrub prefers warm climates, several varieties are very hardy and well suited to harsher climates.

Whatever the configuration – hedge, flower bed or stand-alone – Hibiscus althea will enchant you with the beauty of its flowers.

Its blooming is very generous, in that it is both opulent and constantly renews itself from July to October and even November if the weather stays mild.

Smart tip about Hibiscus althea

If it freezes in your area, it is highly recommended to winterize your plant with horticultural fleece as early as November!


Credits for images shared to Nature & Garden (all edits by Gaspard Lorthiois):
Hibiscus althea branch by Bernd Hildebrandt under Pixabay license
White Hibiscus althea by Daryl Austman under Pixabay license