Gai lan
Gai lan (Brassica oleracea var. alboglabra) is a plant. It grows best in full sun and has moderate water needs.
About Gai lan
Gai lan is a perennial plant that grows 50 cm tall. It grows fast. It is self-fertile, so you only need one.
The flowers attract pollinators.
How to plant gai lan
Gai lan does best in full sun, but also copes with part shade. It grows in sandy soil, loam and clay. It does best at a pH of 5.5–6.5. In a forest garden it belongs in the herb layer.
Plant plants 45 cm apart, at least 30 cm. It struggles in compacted soil, so keep the soil loose.
A year with Gai lan
Spring. It has white flowers in April–June. Sow seed in April. Plant out in April. Protect it from insects in May–September.
Summer. Water during dry spells in June–September.
Winter. It rests through the winter.
Pests and diseases
Gai lan can be attacked by cabbage worms, aphids, flea beetles, cabbage loopers and harlequin bugs. Diseases include downy mildew.
Companions and wildlife
Gai lanThe family
Gai lan is a variety of Wild cabbage, in the genus Brassica. Open a species to see what lies under it.
Gai lanvar. alboglabraThis page
Sources
Added to the wiki 12 October 2026
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