🥦 When to Plant Broccoli
Start indoors; transplant 4 weeks before last frost
📅 Planting Calendar by USDA Zone
Broccoli is a cool-season crop — plant it around your last spring frost, and you can often start it earlier indoors or sow again for a fall harvest. Find the exact start-indoors, transplant, and direct-sow dates for your USDA zone in the table below.
Select your zone to highlight your dates. All dates are calculated from each zone's average frost dates — see how we calculate them.
| Zone | Last Frost | Start Indoors | Transplant | Direct Sow |
|---|---|---|---|---|
| Zone 2A | May 30 | Apr 4 | May 2 | — |
| Zone 3B | May 15 | Mar 20 | Apr 17 | — |
| Zone 4A | May 8 | Mar 13 | Apr 10 | — |
| Zone 4B | May 1 | Mar 6 | Apr 3 | — |
| Zone 5A | Apr 25 | Feb 28 | Mar 28 | — |
| Zone 5B | Apr 18 | Feb 21 | Mar 21 | — |
| Zone 6A | Apr 21 | Feb 24 | Mar 24 | — |
| Zone 6B | Apr 10 | Feb 13 | Mar 13 | — |
| Zone 7A | Apr 5 | Feb 8 | Mar 8 | — |
| Zone 7B | Mar 28 | Jan 31 | Feb 28 | — |
| Zone 8A | Mar 20 | Jan 23 | Feb 20 | — |
| Zone 8B | Mar 12 | Jan 15 | Feb 12 | — |
| Zone 9A | Feb 28 | Jan 3 | Jan 31 | — |
| Zone 9B | Feb 15 | Dec 21 | Jan 18 | — |
| Zone 10A | Feb 1 | Dec 7 | Jan 4 | — |
| Zone 10B | Jan 15 | Nov 20 | Dec 18 | — |
| Zone 11A | Jan 1 | Nov 6 | Dec 4 | — |
Broccoli is a cool-season brassica that produces both a main head and smaller side shoots.
Top Growing Tips
- Start indoors 6-8 weeks before last frost for spring crop
- Harvest main head before flowers open (when buds are tight)
- After main head is cut, side shoots keep producing for weeks
- Floating row covers protect against cabbage worms
- Fall plantings often produce larger heads than spring
Companion Planting
Good companions: onions, celery, potatoes, dill, chamomile
Avoid planting near: tomatoes, peppers, strawberries
Harvest Timeline
55-80 days from transplant
Growing broccoli in your region?
These dates come from your zone's frost windows. For the full month-by-month plan — succession sowing, variety picks, and timing tuned to your climate, not just your zone — our regional vegetable-gardening guides cover your area start to finish.
Find your regional growing guide