Cauliflower Seeds
How to Grow Cauliflower
Start plants indoors where you can provide a germination temperature of 70ºF (21ºC) or more and early growth temperatures of at least 60ºF (16ºC). Start in flats a month before the last frost date so the seedlings will be no more than four five weeks old when they go into the garden. Move the seedlings from flats to 2" growing cells as soon as they can be handled. Moderate but even moisture is critical at this time. You can direct-sow seeds in midspring for early crops or in early summer for fall crops. Transplants that are older than five weeks are too easily stressed by shock, Older plants may become root bound and stop growing. These plants only produce buttons. Cauliflower is the easiest of the cabbage family to stress, then it acts like a two year old and bolts. Cauliflower can be set back by cool temperatures in spring and hot weather in summer, or dry conditions any time. Cauliflower requires a pH of at least 6.5 but it grows best and is most likely to be free of root diseases in a nearly neutral or slightly sweet soil (6.8-7.2)
Sowing
Seed Depth: ¼-½" (6-13 mm)
Germination soil temperature: 80º F (27ºC)
Days to Germination: 6
Sow indoors: 4-6 weeks before last frost
Sow outdoors: From last frost date to late spring
Growing
pH range: 6.5-7.5 (best at 6.8-7.2)
Growing soil temperature: 60-70º F (16-21ºC)
Spacing in beds15" staggered pattern, 3 rows to a bed.
Watering: Moderate and even.
Light: Full sun for best yield, tolerates light shade.
Nutrient requirements: N= high, P=high, K=high
Rotation considerations: Precede with nitrogen fixing cover crop, avoid following cabbage family crops.
Good Companions: Bush beans, beet, carrot, celery, cucumber, dill, lettuce, mint, nasturtium, onion family, pea, potato, rosemary, sage and spinach.
Bad Companions: Pole bean and strawberry
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