Calabrese Broccoli Growing Guide
Brassicaceae family
Days to Harvest65 days
SunlightFull Sun
Frost ToleranceHeavy
Spacing18/sqft
Germination5-10 days
HardinessHardy
Germ. Temp75°F
Start Indoors6 weeks before last frost
Growth Stages
- Seedling
- Early Vegetative
- Late Vegetative / Harvest Ready
Planting Dates by Zone
| Zone | Start Indoors | Transplant | Direct Sow | Harvest |
|---|---|---|---|---|
| Zone 1a | Apr 13 | Jun 8 | — | Aug 7 |
| Zone 1b | Apr 13 | Jun 8 | — | Aug 7 |
| Zone 2a | Apr 3 | May 29 | — | Jul 28 |
| Zone 2b | Apr 13 | Jun 8 | — | Aug 7 |
| Zone 3a | Apr 10 | Jun 5 | — | Aug 4 |
| Zone 3b | Apr 3 | May 29 | — | Jul 28 |
| Zone 4a | Mar 24 | May 19 | — | Jul 18 |
| Zone 4b | Mar 20 | May 15 | — | Jul 14 |
| Zone 5a | Mar 17 | May 12 | — | Jul 11 |
| Zone 5b | Mar 17 | May 12 | — | Jul 11 |
| Zone 6a | Mar 17 | May 12 | — | Jul 11 |
| Zone 6b | Mar 4 | Apr 29 | — | Jun 28 |
| Zone 7a | Mar 4 | Apr 29 | — | Jun 28 |
| Zone 7b | Feb 27 | Apr 24 | — | Jun 23 |
| Zone 8a | Feb 22 | Apr 19 | — | Jun 18 |
| Zone 8b | Feb 8 | Apr 5 | — | Jun 4 |
| Zone 9a | Feb 6 | Apr 3 | — | Jun 2 |
| Zone 9b | Jan 27 | Mar 24 | — | May 23 |
| Zone 10a | Jan 9 | Mar 6 | — | May 5 |
| Zone 10b | Dec 17 | Feb 11 | — | Apr 12 |
| Zone 11a | Dec 17 | Feb 11 | — | Apr 12 |
| Zone 11b | Dec 4 | Jan 29 | — | Mar 30 |
| Zone 12a | Nov 20 | Jan 15 | — | Mar 16 |
| Zone 12b | Nov 20 | Jan 15 | — | Mar 16 |
| Zone 13a | Nov 20 | Jan 15 | — | Mar 16 |
| Zone 13b | Nov 20 | Jan 15 | — | Mar 16 |
Frequently Asked Questions
How long does it take to grow Calabrese Broccoli?
Calabrese Broccoli takes approximately 65 days from planting to harvest.
How much sun does Calabrese Broccoli need?
Calabrese Broccoli requires full sun (6+ hours direct sunlight per day).
How far apart should I plant Calabrese Broccoli?
Plant Calabrese Broccoli at 18/sqft using square foot gardening spacing.
Can Calabrese Broccoli survive frost?
Calabrese Broccoli is tolerant of heavy frost and can withstand freezing temperatures.
How long does Calabrese Broccoli take to germinate?
Calabrese Broccoli seeds germinate in 5-10 days at an optimal temperature of 75°F.
When should I start Calabrese Broccoli seeds indoors?
Start Calabrese Broccoli seeds indoors 6 weeks before your last frost date, then transplant 2 weeks after last frost.
Plan Your Calabrese Broccoli Garden
Track Calabrese Broccoli from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
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