Answer: Alpine Edelweiss is called Leontopodium alpinum and grows 6 inches tall, bearing three or four flowers. Leontopodium sihiricum has flowers twice the size of the Alpine Edelweiss but the leaves are similar in appearance.
Edelweiss grows best in fast draining soil in full sunshine. A rock garden is perfect; the plants form a low clump of silvery grey foliage, bearing odd clusters of woolly white flowers in early summer. These can be cut, or even dried. Edelweiss is short-lived in gardens, but will sometimes self seed when happy. Best in regions with cool summers and drought-tolerant once established.
I cannot find Edelweiss plants for you so you may want to order seeds to sprinkle in your rock garden. Enjoy!
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