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How to Grow Cauliflower

advancedGardeningseasonal9 steps

Safety Warnings

  • Mature heads will not tolerate hard freezes.

Tools Needed

Seedling tray — For indoor propagation
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Watering can/hose — For high-pressure water streams to remove aphids
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Materials

Cauliflower seeds — Varieties may be white, yellow, purple, or green(As needed)
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Tying material — For blanching white-headed varieties(As needed)
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Steps

1
Prepare a site with good soil and full sun exposure.
Tip: Cauliflower is the most finicky of the cole crops and requires high-quality soil.
2
Sow seeds indoors and harden seedlings off before transplanting.
Tip: Seeds germinate at temperatures between 45°F and 85°F.
3
Alternatively, direct seed about three months before the expected fall frost.
Tip: Plant seeds 1/8 to 1/4 inch deep, 1 inch apart in rows 18 to 30 inches apart.
Sow seeds 1" apart 1/4" depth Row spacing 18-30" Cross-section · Direct seeding placement and depth
4
Thin plants to 12- to 18-inch spacings.
Tip: Proper spacing is necessary for the plant to reach full development.
Thin plants 12-18" Healthy seedling Top view · Remove overcrowded seedlings to ensure adequate root space
5
Water consistently and maintain moisture.
Tip: Heads will not develop properly in hot or dry weather; timing is crucial.
6
Control weeds and monitor for pests like cabbage root maggots and cabbage aphids.
Tip: Use a hard stream of water to remove aphids from plants early in the day.
7
For white-headed varieties, tie the leaves over the heads to blanch them.
Tip: This prevents the head from becoming exposed to sun.
TIE LEAVES White head Protective leaf Blanching: Tie leaves over head to prevent sun scorch and browning
8
Harvest when the head is firm and the surrounding thick leaves begin to open.
Tip: Ensure harvest is completed before temperatures become too hot in midsummer.
9
To preserve for a short time, dig up the plant with roots attached and suspend head downward in a cool, moist cellar.
Tip: This is an alternative to immediate consumption.
Suspend Head Root ball attached Support beam Short-term preservation: inverted storage in cool cellar

Pro Tips

  • Seeds can be saved for 4 to 5 years.
  • Expect emergence 4 to 7 days after sowing.
  • Avoid planting during extreme heat as it inhibits head development.

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Sources

Synthesized from 10 verified sources:

Cornell ExtensionView →
GrowstuffView →
Gutenberg: War Gardens GuideView →
Old Farmer's AlmanacView →
Cornell ExtensionView →
Cornell ExtensionView →
Old Farmer's AlmanacView →
Cornell ExtensionView →
Cornell ExtensionView →
Old Farmer's AlmanacView →