Broccoli (Calabrese)

📖 About This Plant

Broccoli (Calabrese) is the standard green heading broccoli of North American gardens — named for the Calabria region of southern Italy where this type was developed — producing tight, dark-green central heads on compact, branching plants that provide weeks of harvest from a single planting. Unlike the Purple Sprouting Broccoli familiar to UK gardeners, Calabrese produces its main central head first (typically 4–8 inches across), followed by a succession of smaller side shoots after the central head is harvested. The flavor of fresh garden Calabrese is significantly sweeter and more complex than commercial broccoli, which is typically harvested before full flavor development for shipping. Broccoli is one of the most nutritionally complete vegetables available, providing vitamins C and K, folate, sulforaphane (a potent anti-cancer compound), and fiber in meaningful amounts per serving.

📊 Quick Facts

📅 When to Plant in Your Area

🌱 Care Tips

Calabrese broccoli produces its best heads in cool weather — aim for harvest in cool autumn rather than hot summer. Start transplants indoors 4–6 weeks before the fall transplant date, which should be 10–14 weeks before your first expected fall frost. This timing puts harvest in September–October when temperatures are dropping and flavor is best. Space transplants 18 inches apart — crowded broccoli produces small, loose heads. Feed at transplanting with a high-nitrogen fertilizer and again when small central heads are visible. Water consistently at 1–1.5 inches per week; water stress causes premature heading (small, loose, open curds). The imported cabbageworm (white butterfly larvae) is the primary pest; apply Bt spray or use fine mesh row cover for complete protection without pesticides. Harvest the central head when it is 4–8 inches across and tight — before any individual florets begin to open and turn yellow. Cut with 4–6 inches of stem. After cutting the central head, the plant will produce multiple lateral shoots (side-shoot broccoli) for several more weeks of harvest. These side shoots are often sweeter and more tender than the initial head. Feed with balanced fertilizer after cutting the main head to support this secondary production. Broccoli tolerates light frost and actually tastes better after mild cold exposure.

🤝 Companion Plants

These plants grow well alongside Broccoli:

🌿 Related Vegetable

More vegetable that grow in similar conditions:

❓ Frequently Asked Questions