Brassica oleracea (Botrytis Group) 'Tirza'
cauliflower 'Tirza'
A Summer cauliflower variety that produces a compact head of pure white curds, perfect for small spaces or containers. It is the earliest cauliflower of the season, heavy cropping and shows some disease resistance
Buy this plant
Size
Ultimate height
0.1–0.5 metresTime to ultimate height
1 yearUltimate spread
0.5–1 metresGrowing conditions
Moisture
Well–drainedpH
Neutral, AlkalineColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green | |||
|---|---|---|---|---|
| Summer | Green | |||
| Autumn | Green | |||
| Winter | Green |
Position
- Full sun
Aspect
South–facing or West–facing
Exposure
Sheltered Hardiness
H3Botanical details
- Family
- Brassicaceae
- Native to GB / Ireland
- No
- Foliage
- Deciduous
- Habit
- Clump forming
- Genus
Brassicas can be annual, biennial or perennial plants, most are upright with alternate, often glaucous leaves, long taproots and clusters of cross-shaped, yellow or white flowers. The genus includes a number of species bred to produce food crops, such as cabbages, turnips, mustards and oilseed rape, as well as others grown for their ornamental value
- Name status
Accepted
How to grow
Cultivation
Grow in fertile, moist but well drained soil in full sun. Sow indoors in October and overwinter under glass before planting out to final position in March or April. See vegetable cultivation
Propagation
Propagate by seed. See sowing vegetable seeds or sowing seeds indoors
Suggested planting locations and garden types
- Patio and container plants
Pruning
No pruning required
Pests
May be susceptible to birds, cabbage caterpillars, cabbage gall weevil, cabbage root fly, cabbage whitefly, cutworms, flea beetle, mealy cabbage aphid, slugs and snails, swede midge
Diseases
May be susceptible to black rot, club root, downy mildew, foot and root rot, grey mould, leaf spot, white blister
Get involved
The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.