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Isatis tinctoria, Isatis, Da-Quing-ye |
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Isatis is the first flower to appear
in spring. A long spike of lemon yellow blooms appears on this three
to four foot biennial. The foliage is dark blue-green and is
used for blue dye. Non-invasive and self-perpetuating in its own bed,
it can be cut back after seed harvest for a modest fall re-growth.
Gentle, willing and non-demanding, this is a plant you can rely on.
Grow specs: Isatis does well with direct seeding, thinned to 10 inches. 3-4 feet. Sandy loam. Full sun. The plant has been used traditionally as a germicide, antipyretic and antiseptic for sore throat and hepatitis. It also clears internal heat. (Photo © Steven Foster) $3.00 |
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