When is the best time to plant cauliflower?
Written by
Nguyen Minh
Reviewed by
Prof. Charles Hartman, Ph.D.The timing of planting is critical for growing successful cauliflower. I have planted too early in the spring and lost seedlings to the frost; I have also planted too late in the fall after the heads became loose. The two periods of planting are early spring and late summer. Consult your first and last frost dates to boom crispy, dense curds.
Spring Planting
- Start seeds indoors 6 weeks before last frost
- Transplant outdoors 2-4 weeks before last frost
- Use row covers to protect from cold snaps
Fall Planting
- Direct-sow seeds 12-14 weeks before first frost
- Opt for heat-tolerant varieties like Amazing
- Shade seedlings during late summer heatwaves
In many cases, fall crops are more productive than spring crops. The cooler weather slows down the bolting process, and the constant moisture helps plump the heads. My biggest Romanesco head (10"/25 cm) came from a September sowing. You can use shade cloth to protect young plants from summer heat that can linger on in the fall.
Steer clear of making these mistakes. Plant after the last frost, and you risk exposing your plants to heat stress. I transplanted Snow Crown in May, but the heads turned bitter and grainy. If you start late, look for hybrids bred to withstand heat. Be sure to monitor soil temps with a probe thermometer.
It's important to make adjustments that are specific to zones of the Zone. Gardeners in Zones 8-10 can plant winter crops if the risk of frost is not severe. I have been able to harvest crops in January by using a heavy mulch and cloches. Be mindful of your microclimates in your gardening experience, south-facing beds will warm up quicker during the spring but they can overheat your fall seedlings as well.
Read the full article: How to Grow Cauliflower: 7 Essential Tips for Success
