Cauliflower
Cauliflower rewards patient gardeners with dense, creamy heads that thrive in the cool, crisp days of spring and fall.
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The Fussiest Brassica Worth Every Bit of Effort
Cauliflower is a cultivated variety of Brassica oleracea, the same remarkable species that gave us broccoli, cabbage, kale, and kohlrabi. Its edible portion, called the curd, is actually a mass of undeveloped flower buds packed tightly together on a compressed stem. Classic curds are white, but modern varieties offer shades of purple, orange, and lime green, each with subtly different flavors and nutrient profiles.
Originally developed from wild cabbage native to the Mediterranean and western Europe, cauliflower has been cultivated for at least 2,000 years. It became especially prized in Italian and French cuisine before spreading globally. Today it has found a second life as a low-carb substitute for rice, pizza crust, and mashed potatoes, making it one of the most versatile vegetables in the modern kitchen.
Planting & care
Start seeds indoors 4-6 weeks before your last frost date, or direct sow in late summer for a fall harvest. Transplant seedlings when they have 4-5 true leaves, spacing them 18-24 in apart in rows 24-30 in apart. Cauliflower demands consistently fertile, well-draining soil with a pH of 6.0-7.0. Work in generous compost before planting and side-dress with a balanced fertilizer every 3-4 weeks to fuel steady, uninterrupted growth.
Consistent moisture is non-negotiable. Uneven watering causes loose, ricey curds or premature bolting. Mulch well to retain soil moisture and moderate temperature swings. When the curd reaches 2-3 in across, practice blanching by gathering the outer leaves over the head and securing them with a rubber band or soft twine. This shields the curd from sunlight, keeping it white and mild-flavored. Self-blanching varieties skip this step entirely. Watch for cabbage worms, aphids, and clubroot, which are the most common threats.
Timing Is Everything
Cauliflower is uniquely temperature-sensitive. Exposure to frost after transplanting can trigger 'buttoning,' where plants form tiny, unusable curds instead of a full head. Equally, temperatures above 80°F cause the curd to brown, separate, or bolt. Nail your planting window, aiming for heads to mature when daytime temps sit between 60-70°F, and you will be rewarded with the tight, brilliant curds this vegetable is known for.
How much sun does Cauliflower need?
Cauliflower grows best in full sun.
How often should you water Cauliflower?
Give it about 1-1.5 in per week.
When is Cauliflower ready to harvest?
Cauliflower is usually ready in 55-100 days from transplant, depending on variety.