How to Grow White Hot Cauliflower
Brassica oleracea var. botrytis 'White Hot'
White Hot Cauliflower is a striking ornamental variety of Brassica oleracea prized for its dramatic white curds that emerge from green foliage. Gardeners grow it to add bold visual contrast to cool-season borders or containers, benefiting from its moderate heat tolerance and resistance to downy mildew.
Starting White Hot Cauliflower: indoors or direct sow?
🏠 Start indoors 4 weeks before your last spring frost, then move the seedlings outside.
Once seedlings have developed a few true leaves, harden them off gradually before transplanting outdoors two to six weeks prior to the last frost date.
Soil, care & harvest
Prepare loose, fertile soil with a pH between 6.0 and 7.0 for optimal growth. As a cool-season crop, start seeds indoors two to six weeks before your last spring frost date. Sow seeds about one-quarter inch deep in seed trays; they typically germinate within five to ten days once conditions are right.
Space plants eighteen to twenty-four inches apart to ensure proper head formation and airflow. While no trellising is needed, maintain consistent moisture by providing approximately 1.5 inches of water weekly. Apply a light layer of mulch around the base to retain soil moisture and suppress weeds throughout the growing season.
Watch for cabbage worms, aphids, flea beetles, and cabbage root fly; use row covers or hand-picking to manage them early. Prevent black rot, clubroot, and bacterial soft rot by ensuring good drainage and avoiding overhead watering. Harvest the white curds sixty-eight to seventy-five days after sowing when they are fully formed.
When to Plant White Hot Cauliflower
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
| Zone | Start Indoors | Direct Sow | Harvest |
|---|---|---|---|
| Zone 1 | April – May | June – July | August – September |
| Zone 2 | April – May | May – July | July – September |
| Zone 3 | March – April | May – June | July – October |
| Zone 4 | March – April | April – June | July – October |
| Zone 5 | February – March | April – May | June – November |
| Zone 6 | February – March | April – May | June – November |
| Zone 7 | February – March | March – May | May – November |
| Zone 8 | January – February | March – April | May – December |
| Zone 9 | January | February – March | April – December |
| Zone 10 | January | January – March | March – December |
| Zone 11 | January | January – February | February – December |
| Zone 12 | January | January – February | February – December |
| Zone 13 | January | January – February | February – December |
Companion Plants for White Hot Cauliflower
✓ Good companions
Repels cabbage worms and white cabbage butterfly with its strong aroma
Improves soil health and may enhance cauliflower flavor while attracting beneficial insects
Attracts beneficial insects like parasitic wasps that control cabbage worms
Natural fungicide properties help prevent clubroot and other soil-borne diseases
Deter aphids, whiteflies, and other harmful insects while attracting beneficial predators
Act as trap crop for aphids and flea beetles, drawing pests away from cauliflower
Repel cabbage maggots, aphids, and other brassica pests with their strong scent
Provides ground cover and has different nutrient needs, reducing competition
✗ Keep away from
Can shade cauliflower and compete for space, while beans may stunt brassica development
Compete for similar nutrients and may harbor pests that also attack brassicas
Both are heavy feeders competing for nutrients, and tomatoes may inhibit brassica growth
Nutrition Facts
Per 100g serving (USDA FoodData Central)
