Edelweiss From Seed – Chill Then Surface-Sow

Grow edelweiss from seed by giving the tiny seed a cold spell, sowing it on the soil surface, and keeping that surface moist until seedlings show.

Give the seed a cold spell, then sow it on the surface

Edelweiss is raised from seed more often than from a division. The seed is tiny, and it germinates better after a cold, moist spell that mimics a mountain winter. [1] Mix the seed with a little damp seed compost or sand, bag it, and refrigerate it for about three to six weeks. Then scatter it on the surface of a gritty mix and press it in. Do not bury it. [2] Mist so the surface stays just moist. Germination is slow and uneven — plan on three to six weeks, sometimes longer, and do not give up after the first week. [3] Seed is the usual way to start this plant. [4] See How to Grow Edelweiss for the grown clump.

1. Mix the seed with a little moist compost or sand, seal it in a bag, and refrigerate it for three to six weeks.
2. Fill a tray with a lean, gritty seed mix. Sow the seed on the surface and press it in. Do not cover it, or only dust it with fine grit.
3. Set the tray in bright light. Mist to keep the surface just moist for three to six weeks, until seedlings appear.
4. Thin to the strongest seedling in each cell once two true leaves show.

Sow outdoors before the last frost, or start it indoors cool

You can skip the refrigerator if you sow outdoors in early spring, before the last frost, and let the weather chill the seed in place. Press it onto a firm, sunny, gritty seedbed and mist until seedlings show. Thin them later to about 8 inches. To start indoors, finish the fridge chill first, then sow on a gritty tray in bright, cool light four to six weeks before the last frost. Harden the seedlings off for a week — a few hours outside at first, then more sun — and set them out after frost, with the crown high, as on Planting Edelweiss.

1. For a direct sowing, scatter seed on a firm, sunny, gritty bed in early spring before the last frost, press it in, and mist until seedlings show.
2. Thin the plants to about 8 inches once they have two true leaves.
3. To start indoors, chill the seed first, sow on a gritty tray, keep it lightly moist in bright cool light, then harden off and plant out after frost.

If the seed never comes up, it was probably buried, skipped the cold spell, or left to dry out. Next time press it on the surface after a chill, and keep that surface just moist until seedlings show.