SproutSmart
SproutSmart™ Intelligent Garden Sowing

Calabrese Green Sprouting

Broccoli
Zone 1b Save Garden

Planting Schedule

Add Calabrese Green Sprouting to your garden to build a schedule and get reminders.
Botanical illustration of Calabrese Green Sprouting
75d to harvest

Tender, sweet sprouting florets emerge in a cascade of deep green—lush to the eye and delightfully mild on the palate. Calabrese Green Sprouting forms a sturdy, blue-green head that quickly gives way to abundant side shoots, each one crisp-tender with a fine, succulent bite. Ideal for gardeners who love repeat harvests, it shines in fresh salads and shines just as brightly when roasted, steamed, or folded into hearty sauces for weeknight abundance.

Sowing Tips

Soil Temperature

Direct sow or transplant when soil at planting depth holds 40°F for reliable germination and early growth.

Expert Note

For continuous harvest, cut the main head cleanly and keep plants evenly watered to trigger multiple side shoots.

Crop Dates

Growing note: Zone 1b has only 61 frost-free days — shorter than this crop's 75-day maturity. Outdoor planting is not viable; use protected cultivation.
MilestoneDate
Last FrostJun 1st
Growing ApproachProtected Environment Only

Crop Details

TraitValue
Days to Maturity75
Sun RequirementsFull SunFull sun
Growth HabitUpright
Support NeededNone
Planting DepthNormal
Germination Temp (°F)45
Min Soil Temp (°F)40
Min Night Temp (°F)35
Harden Off (days)6

Today's Conditions

Outdoor planting for Calabrese Green Sprouting in Zone 1b typically begins around Indoor Lights Only. Wait until soil reaches at least 40°F before transplanting Calabrese Green Sprouting.

Garden Alerts

Zone 1b has only 61 frost-free days — shorter than this crop's 75-day maturity. Outdoor planting is not viable; use protected cultivation.

Recommended Companions

Red Baron Onion
View Details →
German White Garlic
View Details →
White Plume Celery
View Details →
Red Venture Celery
View Details →
Ebenezer White Onion
View Details →
Inchelium Red Garlic
View Details →

Frequently Asked Questions

What disease is most likely on Calabrese (Brassica oleracea var. italica) and how do I treat it?
Watch for black rot, which shows as yellowing V-shaped leaf lesions that darken and spread, especially in cool, wet weather. Remove and destroy infected leaves immediately, avoid overhead watering, and improve airflow by spacing plants well. If it keeps spreading, rotate out of Brassicaceae beds for several years and consider an approved copper or biological fungicide labeled for brassicas in your area.
How often should I water Calabrese during the main growing phase?
During heading and sprout development, keep the soil evenly moist—aim for about 1 to 1.5 inches (2.5–4 cm) of water per week depending on rainfall. Water deeply when the top 1 inch of soil (2–3 cm) starts to dry, rather than giving frequent light sprinklings that encourage shallow roots and stress. Consistent moisture helps prevent uneven sprouting and bitter-tasting florets.
How can I tell when Calabrese is ready to harvest?
Harvest when the main head is fully formed and tight, with flower buds still firm and green, before any yellow blossoms appear. After cutting the main head, continue harvesting the side shoots when they reach the size of your thumb and the buds are still tight. For most home plantings, this is around 75 days from sowing/transplanting, but head firmness is the true trigger.

Sowing Tips

Soil Temperature

Direct sow or transplant when soil at planting depth holds 40°F for reliable germination and early growth.

Expert Note

For continuous harvest, cut the main head cleanly and keep plants evenly watered to trigger multiple side shoots.

Botanical illustration of Calabrese Green Sprouting

Tender, sweet sprouting florets emerge in a cascade of deep green—lush to the eye and delightfully mild on the palate. Calabrese Green Sprouting forms a sturdy, blue-green head that quickly gives way to abundant side shoots, each one crisp-tender with a fine, succulent bite. Ideal for gardeners who love repeat harvests, it shines in fresh salads and shines just as brightly when roasted, steamed, or folded into hearty sauces for weeknight abundance.