Brussels Sprouts

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Brussels sprouts ready for harvest (Photo: Allen Buchinski)

Pest management: Pests and diseases of Brussels sprouts

The Basics

Brussels sprouts are a cool season crop, preferring temperatures under 70º F. Sprouts maturing in hot weather and/or dry conditions are more likely to develop bitterness.

When to plant: 

• Transplant into the garden in Jul–Aug (possibly Sept).
• If grown from seed, start 4–5 weeks before desired transplant date.

Harvest window: 

• Sprouts form at the places on the stalk where the leaves attach.
• They are ready to pick when they are 1" in diameter and firm.
• Lower sprouts are ready first and should be harvested earlier than sprouts farther up the stem.

Care overview:

• Provide initial nitrogen fertilizer for growth, but avoid additional nitrogen after sprouts begin to form to keep the sprouts from splitting.
• Some growers like to remove the lower leaves, but it isn't necessary.

More links:

• Brussels sprouts 2006 trials
• Brussels sprouts information from the University of Illinois Extension

Recommended Varieties for Santa Clara County^*

Jade Cross

^* Many other varieties may also do well here in Santa Clara County. This list is based on UC Master Gardener trials, taste tests, and feedback from local growers.

Also: Cornell University has a disease-resistant Brussels sprouts variety listing.