Achillea umbellata In summary :
Latin name : Achillea umbellata
Common name : Achillea
Family : Asteraceae
Type : Persistent perennial
Harbor : Upholstery cushion
Height : 5 to 15 cm
Planting density : 6 to 8 feet per m²
Exposure : Sunny or even partial shade
Ground : All types, but well drained
Flowering : May to September
TheAchillea umbellata is part of the genus of yarrow. However, it differs from its fellows by its small spaced white flowers and its fragrant gray-blue foliage.
Like other yarrow, theAchillea umbellata flourishes perfectly in full sun. It also tolerates partial shade. Choose a dry or well-drained soil to avoid excess water.
For a quick ground cover effect, plant 6 to 8 feet per square meter. This perennial does not require special soil preparation before planting.
Maintenance of theAchillea umbellata
TheAchillea umbellata is not a plant that requires a lot of maintenance. However, two actions are recommended to ensure good flowering:
- Cut off dead flowers, in order to promote a new flowering. The latter will be a little less important than the first. We are talking about a floral lift.
- At the end of the season (end of September, beginning of October) fold down the leaf cushion about 5 or 10 cm high.
Multiplication ofAchillea umbellata:
The easiest way to propagate your plant is to to divide. To do this, dig up the yarrow and divide it into several pieces. Choose the most vigorous and replant them.
Diseases and pests:
In general, yarrow are sensitive to powdery mildew which results in a faint white felt on the foliage.
When it comes to pests, the aphids are the problem. They weaken the plant and facilitate the development of a fungal disease without serious consequences, but highly unsightly: sooty mold.
Employment and association
TheAchillea umbellata can be used in all situations: massive, borders, rockeries and even as ground cover in a large pot with a shrub for example.
As such, it can be associated with an althea (Hibiscus syriacus) or a Cornus alba ‘Sibirica’. These two shrubs tolerate container cultivation and severe pruning well.
For other uses, you can opt for:
- Ophiopogon planiscapus 'Nigrescens' whose black foliage will contrast beautifully with the white flowers and gray-blue foliage of theAchillea umbellata. Still in the idea of contrast, you can also opt for theAjuga reptans 'Atropurpurea'.
- Persicaria affinis ‘Superba’ or Persicaria bistorta ‘Superba’ which are also excellent ground cover and which will bring volume to your plantation thanks to their inflorescence.
If you want to bring light to your plantation, then associate theAchillea umbellata with the Carex hachijoensis, the Potentilla megalantha or theHakonechloa macra "Aureola".