|Achillea clavennae; photo by Todd Boland|
- Description and general information
- Achillea clavennae is also known as silvery yarrow. They are native top the eastern Alps and the Balkan Peninsula. Plants form low rosettes of divided, fragrant, silvery-pubescent leaves which are partially evergreen. In mid-summer arise stems 15-25 cm that are topped with a flat cluster of white flowers. Prompt dead-heading often results in a second flush of flowers in early autumn.
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- This yarrow requires well-drained soil in full sun to light shade. They are not fussy in regards to soil pH. Do not over-fertilize as it will encourage lush foliage and few flowers. Plants are reasonably drought-tolerant. They are rated from USDA zones 3-8.
- Bloom period
- Mid-summer with sporadic blooms through fall.
- Seed, cuttings or division.
- Seeds may be sown at 15-20 C with no stratification required.
- Plants may be dug and divided in early spring in colder zones or in the fall in milder zones.
- Plants spread by short rhizomes. Non-flowering sections of rhizome with a rosette attached may be taken as cuttings in summer and root quite quickly.
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Created by Todd Boland.
Last Modification: Thursday 24 of March, 2011 17:55:18 CDT by Todd Boland.
The original document is available at http://nargs.org/nargswiki/tiki-index.php?page=Plant+of+the+Month+April+2011