Broccolini in Zone 10a & 10b

Brassica oleracea var. italica x alboglabra

When to plant broccolini in zone 10b

Zones 10a and 10b share the same average frost dates in our data, so this page covers both.

Method: Start indoors: Start indoors from seed, then transplant outside. Broccolini needs a head start most zones can't give it by direct-sowing alone.

Start indoors	Dec 26–Jan 2 '27
Direct sow / transplant outside	Jan 30–Feb 6
Estimated harvest	Mar 26–Apr 2 (~55 days after transplanting)

Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 1.5-2 ft.

Broccolini is a cross between broccoli and gai lan, both of which this site already covers separately. It is worth its own square because you harvest it on a completely different rhythm.

How broccolini fits zone 10's season

Zone 10b's frost-free window runs about 324 days, from January 30 to December 20. Broccolini needs about 55 days from transplant to first harvest.

Good companions

No standout companions recorded yet for Broccolini.

Where to buy broccolini seeds

See why we recommend these suppliers →

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