Artemisia 'Powis Castle'
wormwood
- Position: full sun
- Soil: well-drained, fertile soil
- Rate of growth: fast-growing
- Flowering period: August
- Hardiness: fully hardy
Artemisias are prized for their light, almost silver, aromatic foliage rather than for their flowers, which are dull and insignificant. This cultivar has fine, fern-like, aromatic leaves and tiny, yellow-tinged silver flowers in August. The billowing foliage of this woody stemmed perennial is ideal for a sunny rock garden or border. Although it's one of the hardiest varieties of wormwood, do plant it in a well-drained site, as the plant is likely to be short-lived in poorly drained soil. - Garden care: Cut back in early spring, but be careful not to cut into the old, woody stems that do not have buds unless it needs complete regeneration, as this may kill the plant. It helps if you can wait until the new buds are breaking before tackling it, as this will give you an indication as to where to make the cut. They fill out really quickly after pruning, but the tips may need pinching out to prevent them getting leggy.
How to get more flowers

Many flowering plants can be encouraged to produce better and longer-lasting displays with the minimum of effort. A plant produces flowers in order to reproduce and ensure the survival of the species. Once a plant has flowered and fertilisation has...
Read full articleHow to use companion plants
Companion planting is a method of growing different plants adjacent to one another for the benefit of one or both of the companions. Some plants are thought to confuse or act as a decoy to potential pests, while a few...
Read full articleMediterranean
Mediterranean gardens can take on various guises from the rustic and rambling to the formal elegance of an Italian courtyard. However, they all have key features in common, including the use of exotic, sometimes tender, drought-tolerant plants in pots and...
Read full articleMarch pruning of trees, shrubs and climbers
Use the following notes as a guide when pruning trees, shrubs and climbers in your garden during the month of March. I’ve included timely advice on Abeliophyllum, Artemesia, Brachyglottis, Brunfelsia, Buddleja, Ceanothus, Clematis, Colutea, Cotinus, Daphne, Eccremocarpus, Elsholtzia, ...
Read full articleChelsea Chop and other methods of extending the flowering season
Many gardeners who are happy, even gung-ho, with the secateurs when pruning shrubs and climbers are surprisingly reluctant to take the shears to herbaceous perennials. Maybe this is because it just doesn’t seem quite right to be cutting back all...
Read full article




Combine this billowing mound of finely cut, grey-green foliage with sun lovers on your hottest, driest sites for summer exuberance
Val Bourne - Garden Writer