Broccoli
cool-season crop
At a glance
| Suitable zone groups | All four zone groups (3-4, 5-6, 7-8, 9-10), as a cool-season annual |
|---|---|
| Planting window | See the guide text below, in general terms relative to your last spring frost |
| Sun | Full sun |
| Soil | Fertile, moist, well-draining soil rich in organic matter |
| Watering | Consistent watering, soil evenly moist |
About this plant
Broccoli is a hardy, frost-tolerant cool-season vegetable suitable for spring and fall gardening across all climate zones. Plant in early spring for an early summer harvest, or set out transplants in late summer for a fall crop. Broccoli grows best in full sun and fertile, moist, well-draining soil rich in organic matter.
Consistent watering is critical to prevent the heads from flowering early. Provide a thick layer of mulch around the base of the plant to retain soil moisture and keep the root system cool as temperatures warm up.
Common beginner failures and fixes
- Premature flowering or bolting: Water regularly and apply mulch to keep roots cool during warm spells.
- Cabbage worms eating leaves: Cover young plants with lightweight floating row covers or handpick caterpillars.
- Loose or small main heads: Ensure the soil is rich in organic matter and watered evenly throughout growth.
- Stunted plant growth: Avoid crowded spacing and plant in a full-sun location with fertile soil.
Beginner checklist
- Select a spot with full sun exposure and well-draining, rich soil.
- Mix organic compost into the planting area before planting.
- Plant early in the spring or in late summer for a fall crop.
- Apply mulch around plants to conserve soil moisture and suppress weeds.
- Harvest the main center head while buds remain tight and firm.
Zone groups and planting windows here are general guidance. Confirm your own zone and last frost date locally before planting.