Growing Lupines from Seed in Boise: Color Variation and Heat Dormancy

Your 'Russell's Hybrid Mix' lupine in Boise (Zone 6b) sets seed pods yearly. You want more plants and wonder: will seeds give the mix colors, or just the parent's dark salmon-purple?

Seed Reality Check

• Hybrids don't come true. Seeds produce variable offspring—some similar, some reverting to wild-type blue/purple, some novel.
• You won't get the full catalog mix. That requires controlled crosses.
• Expect a surprise palette—part of the fun.

Boise-Specific Strategy

• Hot summers (80–100°F) = summer dormancy. Plants die back, return in spring.
• Sow in spring (after last frost, ~April), not fall. Fall-sown seedlings may rot in winter wet.
• Planting depth: 1/8–1/4" (seed length). Light aids germination.
• Keep moist, not soggy. 10–20 days to germinate at 60–70°F.

Pro Tip: Scarification Helps

Lupine seeds have hard coats. Nick with nail clipper or rub between sandpaper → soak 24 hrs → sow. Boosts germination 2–3×.

Long-Term

• Lupines are short-lived (3–5 years) but self-sow.
• Allow some pods to shatter naturally.
• Thin seedlings to 12–18".

You'll get a unique, evolving lupine patch—not a catalog copy. That's the beauty of open-pollinated hybrids.