How to Grow Purple Sprouting Broccoli

Purple Sprouting Broccoli

Brassica oleracea var. italica

vegetable

Purple Sprouting Broccoli is a cold-hardy brassica that produces tender purple florets and shoots in late winter and early spring. Unlike standard broccoli, it doesn't form a large central head but rather produces numerous smaller side shoots over several months. It's prized for its sweet, delicate flavor and extended harvest season.

Looking for a specific variety?

Early Purple Sprouting Late Purple Sprouting Red Sprouting Broccoli White Sprouting Broccoli Nine Star Perennial Broccoli Cavolo Nero

Growing Conditions

☀️

Sun: Full sun, 6-8 hours daily; tolerates partial shade in hot climates

💧

Water: Consistent moisture is critical; water deeply 1-2 inches per week. Reduce watering slightly in winter but maintain soil moisture. Avoid waterlogging.

📏

Spacing: 18 inches

📅

Days to maturity: 150-200 days from transplanting (long season crop)

🌱

Planting depth: 0.25 inches for seeds; transplant at 3-4 weeks old

Soil

Type: Well-draining, fertile loamy soil with high organic matter

pH: 6.0-7.5

Amendments:

Compost or aged manure Balanced fertilizer (10-10-10 or similar) Lime if soil is too acidic Kelp meal for trace minerals

Growing Zones

Find your zone →

Thrives in zones 3-9, with best performance in zones 5-8 where it overwinters well

3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a

Growth Stages

Seedling

3-4 weeks

Small plants with 2-4 true leaves, typically 3-4 weeks old at transplanting

Keep soil consistently moist but not waterlogged. Provide bright light to prevent leggy growth. Harden off gradually before transplanting.

Vegetative Growth

8-12 weeks

Plants develop 6-10 true leaves and establish a strong root system; leaf color deepens to blue-green

Water regularly and maintain soil fertility. Apply mulch to regulate temperature and moisture. Monitor for early pest infestations.

Overwintering

8-12 weeks

Plants enter dormancy in cold climates; growth slows considerably but plants remain alive under snow and frost

This is essential for purple sprouting broccoli's flavor development. Ensure good drainage to prevent waterlogging. Light winter mulch may help in severe climates (zones 3-4).

Shoot Production

6-10 weeks

As temperatures warm in spring, purple flower buds form on main stem and side shoots; tender shoots are deep purple or blue-green

Begin harvesting when shoots are 4-6 inches long. Regular harvesting encourages continued production. Side-dress with nitrogen fertilizer in early spring to support growth.

Harvest & Decline

4-8 weeks

Continued production of shoots over several weeks; plants eventually flower and bolt as temperatures warm

Harvest shoots regularly to extend season. Remove any yellow or wilting leaves. Plant will decline by late spring/early summer in most climates.

Companion Planting

Plan your garden →

Plant with:

Lettuce Spinach Chard Beets Carrots Onions Garlic Thyme Chamomile Marigolds

Avoid planting near:

Tomatoes Peppers Beans Fennel Dill Cabbage family members (to avoid pest concentration)

Common Pests

Use row covers until plants are established. Hand-pick caterpillars. Apply Bacillus thuringiensis (Bt) if needed.
Use row covers on young transplants. Neem oil spray. Diatomaceous earth around plant base.
Strong water spray to dislodge. Insecticidal soap. Encourage beneficial insects like ladybugs.
Ensure good drainage and soil pH above 6.8. Avoid planting brassicas in same location for 4+ years. Remove affected plants immediately.
Ensure good air circulation. Sulfur dust or baking soda spray. Remove affected leaves.

Uses

🍳

Spring Vegetable & Tender Shoots

Culinary

Purple sprouting broccoli shoots are sweeter and more tender than standard broccoli, excellent steamed, roasted, or in stir-fries. Both shoots and young florets can be eaten raw in salads or lightly cooked as a delicate side dish. [source]

💊

Cruciferous Vegetable Benefits

Medicinal

All brassicas are rich in glucosinolates and sulforaphane, compounds linked to cancer-preventive properties and detoxification support. Purple varieties additionally contain anthocyanin antioxidants. [source]

🏠

Winter & Spring Provision

Household

Purple sprouting broccoli fills the hungry gap between autumn and spring harvests when few fresh vegetables are available. Its long season and cold hardiness make it valuable for year-round gardening. [source]

🦋

Pollinator Support

Wildlife

If left to flower, purple sprouting broccoli provides an important early spring nectar source for bees and other pollinators emerging from winter dormancy. [source]

🍳

Extended Harvest Window

Culinary

Unlike standard broccoli which produces one main head, purple sprouting varieties yield multiple harvests over 6-10 weeks, providing consistent tender shoots throughout late winter and spring. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Begin harvesting in late winter to early spring when central shoots are 4-6 inches long with tight, unopened florets. Cut shoots with 2-3 inches of stem attached. Pinch off the top 1-2 inches to encourage branching and continued production. Regular harvesting extends the season. Harvest before flowers open. Season typically runs February-May in northern climates, October-April in milder regions.

Fun Facts

🌱 Purple sprouting broccoli was nearly extinct by the 1970s but was saved by dedicated organic farmers and seed savers in Britain, where it remains a beloved heirloom crop.
🌱 The cold exposure actually improves the flavor—starches convert to sugars in freezing temperatures, making shoots harvested after frost noticeably sweeter than those picked before winter.
🌱 Unlike heading broccoli, purple sprouting varieties don't form a large central head; instead, the entire above-ground plant becomes edible as multiple tender shoots develop throughout the season.

Want personalized planting timelines?

Get started free