Back to Results

Calabreses in York

Brassica oleracea var. italica

Calabrese
Vegetable Active in July

Calabrese (broccoli) produces a large central head of tightly-packed green buds, followed by smaller side-shoots after the main head is cut. It’s a cool-season brassica crop. Grow it in full sun with fertile, well-drained soil and keep plants watered during dry spells. Harvest the heads while firm, then leave the stem in the ground to allow side-shoots to develop.

Height
60cm
Sunlight
Full Sun
Water
Moderate Water
Add to garden

Growing Guide

Step-by-step instructions for growing Calabrese

Planting Calendar

Seed DirectLater
J
F
M
A
M
J
J
A
S
O
N
D
FertiliseNow
J
F
M
A
M
J
J
A
S
O
N
D
HarvestNow
J
F
M
A
M
J
J
A
S
O
N
D
MaintenanceLater
J
F
M
A
M
J
J
A
S
O
N
D

Growing Guide for

Change the guide to see different planting timelines and tips.

Sow Calabrese directly outdoors for a later harvest, useful for extending the cropping season into autumn.

  1. Sow Seeds Directly

    29 Apr – 29 May
    every 3 weeks

    Sow seeds directly into prepared soil from 29th April - 29th May. Make drills deep and space seeds apart, thinning later. Cover lightly with soil and water well. For a continuous harvest, sow a new batch every 21 days until midsummer.

  2. Thin Seedlings

    28 May – 4 Jun

    Thin seedlings to the final spacing of apart once they have two true leaves, around 28th May - 4th June. Remove the weakest plants, leaving the strongest to grow. Water after thinning to help the remaining plants establish.

  3. Install Pest Protection

    4 Jun – 11 Jun

    Protect plants from pests as they grow from 4th June - 11th June. Use fine mesh netting to cover the bed, securing it well to keep out butterflies and birds. Add brassica collars to each plant to prevent root fly damage.

  4. Feed Plants

    11 Jun – 25 Oct
    every 4 weeks

    Apply a nitrogen-rich fertiliser every 28 days from 11th June to encourage growth. Use a liquid feed or granular fertiliser, watering it in thoroughly. Discontinue feeding when the central head begins to form.

  5. Harvest Calabrese

    23 Jul – 25 Oct

    Cut the main head when it's compact and before the flowers open, from 23rd July. Harvest side shoots regularly as they develop until 25th October. Keep the soil moist to reduce the risk of bolting during dry spells.

Companion Plants

Tap a plant to see why it works (or doesn't) with Calabrese.

Good companions

Plants to avoid

Why companion planting matters

Companion planting can deter pests, improve pollination, and make better use of space. Some plants confuse pests or attract beneficial insects; others improve soil or offer shade to neighbours that need it.

Suggested Varieties

Popular varieties of Calabrese to consider

Belstar

A reliable F1 hybrid with good heat tolerance, producing medium-sized blue-green heads and abundant side shoots. It's resistant to bolting and suitable for UK summers.

Green Magic

An early-maturing variety with uniform, dense heads and a sweet flavour. It performs well in cooler conditions and is ideal for succession sowing.

Ironman

A vigorous F1 hybrid known for its large central head and prolific side shoot production. It has good disease resistance and is well-suited to organic growing.

Also in nearby towns

See how Calabrese timing shifts in other towns with different frost dates.