When to plant
A cool-season crop. Start transplants indoors 4–6 weeks before last frost for spring planting. Broccoli is frost-hardy and actually tastes sweeter after light frost. In most climates, a fall crop (planted in midsummer) produces the best-tasting heads.
Soil & site
Broccoli is a heavy feeder that needs rich, well-drained soil. pH 6.0–7.0. Work in a generous layer of compost before planting. Like all brassicas, broccoli benefits from calcium in the soil — add garden lime if soil pH is below 6.0. Deep soil preparation (30 cm) supports strong root systems.
Feeding
Apply a nitrogen-rich fertilizer (blood meal, fish emulsion) every 3–4 weeks. Switch to a balanced fertilizer as the head begins to form. A calcium foliar spray reduces tip burn and hollow stem. Stop heavy nitrogen feeding once the head is developing.
Common problems
Cabbage worms (green caterpillars from white butterflies — hand-pick or use Bt spray weekly). Aphids on new growth and under leaves. Clubroot (swollen, distorted roots in acidic soil — test and raise pH). Flea beetles on young transplants — use row cover. Downy mildew in cool wet conditions.
When to harvest
Broccoli is ready when the head is dense, tight, and dark green — before any yellow flowers open. The head should feel firm, not soft. Buds should be compact. If the head starts to loosen or you see any yellow, harvest immediately.
How to harvest
Cut the main head with a sharp knife, leaving 10–15 cm of stem. Cut at a slight angle to prevent water pooling on the cut stem. After the main head is harvested, leave the plant in the ground — it will produce many smaller side shoots (florets) for weeks. Harvest side shoots when they reach 5–8 cm.
Storage & use
Store unwashed broccoli in the refrigerator in a loose bag for up to 5 days. For long-term storage, blanch 3 minutes in boiling water, shock in ice water, dry, and freeze for up to a year. Broccoli stored at room temperature yellows within a day.
Companion planting
Chamomile improves growth and flavor of broccoli when planted nearby.
Useful for growing broccoli
A few things that make this one easier — chosen for this plant, not a generic list.
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