Flower Sprouts in Zone 5a & 5b
Brassica oleracea
When to plant flower sprouts in zone 5b
Zones 5a and 5b 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 | Mar 29–Apr 5 |
|---|---|
| Direct sow / transplant outside | Apr 26–May 3 |
| Estimated harvest | Aug 4–Aug 11 (~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 5's season
Zone 5b's frost-free window runs about 148 days, from May 10 to October 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 5b 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 5b: when to start seeds indoors, when to direct-sow, and when to expect a harvest.
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