Flower Sprouts in Zone 3a & 3b
Brassica oleracea
When to plant flower sprouts in zone 3b
Zones 3a and 3b share the same average frost dates in our data, so this page covers both.
Method: Start indoors: Start indoors from seed, then transplant outside. Flower Sprouts needs a head start most zones can't give it by direct-sowing alone.
| Start indoors | Apr 18–Apr 25 |
|---|---|
| Direct sow / transplant outside | May 16–May 23 |
| Estimated harvest | Aug 24–Aug 31 (~100 days after transplanting) |
Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 2-3 ft.
Flower Sprouts is a separately trademarked kale x Brussels sprouts cross from a different breeding line than Kalettes, though the two are similar in concept: small, ruffled, purple-and-green florets running up a tall stalk instead of the tight round sprouts of a standard Brussels plant.
How flower sprouts fits zone 3's season
Zone 3b's frost-free window runs about 98 days, from May 30 to September 5. Flower Sprouts needs about 100 days from transplant to first harvest.
Good companions
No standout companions recorded yet for Flower Sprouts.
Where to buy flower sprout seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing flower sprouts" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 3b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing Flower Sprouts in USDA zone 3b: when to start seeds indoors, when to direct-sow, and when to expect a harvest.
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