Homegrown broccoli tastes nothing like the tired florets in supermarket bags: cut in the morning and on the plate by lunch, it is sweet, nutty and tender in a way shop-bought never is. Broccoli is also more generous than most vegetables — cut the main head and the plant keeps producing side shoots for weeks, sometimes months, from the same roots.
This guide covers the two types beginners grow — quick summer calabrese and overwintering purple sprouting — plus sowing times, firm planting, the harvest trick that keeps plants producing, and the netting that protects brassicas from their many enemies. Written for Central and Western Europe, no experience assumed.
| Care point | What broccoli needs |
|---|---|
| Sun | Full sun — the more the better |
| Water | Regular — keep soil evenly moist |
| Soil & pH | Rich, firm, well-drained; pH 6.5–7.5 |
| Sow calabrese (Central Europe) | March–June (indoors or direct) |
| Sow purple sprouting | May–June |
| Spacing | 45 cm apart each way |
| Days to harvest | Calabrese 70–100 days; purple sprouting 200+ days |
| Difficulty | Easy — but netting is essential |
Step 1: Know your two broccolis — calabrese vs purple sprouting
Calabrese is the familiar green-head broccoli: sown in spring, harvested in summer and autumn, done in one season. It is the quick win — sow in April, eat in August. Purple sprouting broccoli is the patient one: sown in early summer, it grows through autumn and winter, then produces armfuls of purple spears in late winter and early spring — exactly when the garden offers almost nothing else.
Beginners should grow both: a row of calabrese for summer eating and a row of purple sprouting for the hungry gap in March and April. They need identical care; only the timing differs. Good beginner varieties: 'Belstar' or 'Marathon' for calabrese; 'Early Purple' or 'Red Arrow' for purple sprouting.
Step 2: Sow at the right time — and firm the soil
Sow calabrese March to June — early sowings indoors in modules (see our seed-starting guide), later sowings direct where they will grow. Sow purple sprouting May to June in a seedbed or modules for transplanting. Stagger calabrese sowings a month apart for a longer harvest rather than one glut.
Brassicas hate loose, fluffy soil — they grow best in firm ground. Tread the bed firm before planting, and set each plant slightly deeper than it was growing. Firm planting anchors plants against winter winds and grows sturdier stems; it is the single most skipped step in brassica growing.
Step 3: Plant firmly with generous spacing
Space plants 45 cm apart each way — broccoli grows into substantial plants and crowded ones stay small and bolt early. Water in well, and mulch around (not over) the young plants to hold moisture (see our mulching guide).
Like kale, broccoli is a hungry brassica that appreciates rich soil: work compost into the bed before planting (see our soil basics guide). In exposed gardens, earth a little soil up around the stem base in autumn for extra anchorage against gales.
Step 4: Keep them fed and watered
Broccoli needs steady moisture to form good heads — drought at head-forming time gives small, loose, bitter heads. Water deeply once or twice a week in dry spells, following the method in our watering guide.
Feed hungry plants through the season: a nitrogen-rich feed or compost mulch in midsummer keeps leaves growing strongly. Do not overfeed late in the season, though — soft, sappy autumn growth is more vulnerable to frost damage on overwintering purple sprouting.
Step 5: Harvest the head — then keep picking side shoots
Cut the central head when the buds are tight and firm, before any yellow flowers open — once it flowers, that head is past its best (though still edible). Cut with about 10–15 cm of stem, making a clean slanted cut so rain runs off the stump.
Here is the payoff: do not pull the plant. Within weeks it produces side shoots from the leaf joints — smaller spears you harvest the same way, again and again. A healthy calabrese plant gives side shoots for 6–8 weeks after the main head; purple sprouting produces spears for two to three months in spring. This cut-and-come-again habit is the same principle as chard and kale — the plant keeps feeding you as long as you keep picking.
Step 6: Net against pigeons and cabbage whites — non-negotiable
Broccoli has two serious enemies and netting defeats both. Cabbage white butterflies lay eggs from April; their caterpillars strip plants to skeletons within days. Pigeons shred unprotected brassicas in autumn and winter. The fix is one job: cover with fine netting from planting until harvest, draped over hoops so birds cannot peck through to the leaves.
Check under leaves for tiny yellow eggs and squash them — a 30-second job that prevents an infestation. See our pests guide for the full organic controls. Un-netted broccoli in most gardens is not a crop, it is a pigeon feeding station — net it.
Troubleshooting: common broccoli problems
Holes in leaves, green caterpillars underneath: Cabbage white caterpillars — pick them off by hand and net the plants. Badly stripped plants usually recover if the growing point survives, but prevention beats cure.
Plants tall, leggy and rocking in the wind: Planted too shallow in loose soil. Plant firmly and deeply, tread the ground firm, and earth up stems in autumn. Staking rescues the worst cases.
Yellow leaves despite watering: Usually nitrogen hunger in poor soil — feed with a nitrogen-rich fertiliser. Our Plant Doctor guide to yellow leaves walks through the full diagnosis.
Heads bolted straight to flower: Heat or drought stress at head formation, or a variety sown at the wrong time. Keep plants watered, mulch to keep roots cool, and sow each type in its proper window.
What to do this October
October is crossover month for broccoli: late calabrese is still producing side shoots — keep picking them before frosts finish the plants. Meanwhile, purple sprouting sown in summer should be sturdy young plants by now: net them against pigeons before the hungry months, earth up the stems, and clear yellowing lower leaves.
Do not be tempted to harvest purple sprouting yet — the spears come in late winter and spring, and picking now just weakens the plants. Patience is the whole game with PSB. See the full October checklist for the month's other jobs.
Frequently asked questions
Which is easier — calabrese or purple sprouting?
Calabrese is faster and simpler (one season, summer harvest). Purple sprouting needs patience and winter netting but rewards you with spring spears when nothing else crops. Grow calabrese first; add PSB in year two.
Can I grow broccoli in pots?
One plant per 15-litre pot minimum — they are big, hungry plants. It works, but pots need constant watering and feeding. In the ground is easier and more productive.
Why did my broccoli flower immediately?
Stress — usually a cold check after transplanting or drought at head formation. Harden off properly, plant out after frost, and keep plants consistently watered.
How long does one plant keep producing?
Calabrese: main head plus 6–8 weeks of side shoots. Purple sprouting: 2–3 months of spears in late winter and spring. Keep picking and the plant keeps producing.
Related guides
- How to Grow Kale at Home: Beginner's Guide — the other hardy brassica
- Common Garden Pests and How to Stop Them — beat cabbage whites and pigeons
- Starting Seeds Indoors: A Beginner's Guide — start calabrese on the windowsill
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