Pest management: Pests and diseases of Brussels sprouts
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.
- 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.
- 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.
Recommended Varieties for Santa Clara County*
* 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 Brussels sprouts variety listing developed as part of their Citizen Science Program.