When should I sow kale in the UK?

Mid-April to early June. Earlier than April risks bolting before the plant has matured; later than June and the plants won't be big enough by autumn to crop through winter. Successional sowing isn't usually needed — a single sowing in May gives plants that produce from October until they bolt the following spring.

Why are pigeons stripping my kale?

Winter food shortage. From October onwards, woodpigeons hit any unprotected brassicas and can reduce a plant to a stump overnight. Net firmly with enviromesh or pigeon netting supported on hoops 30 cm above the plants — they peck through anything touching the foliage. Re-tension after windy nights.

What's the difference between cavolo nero, curly kale, and Red Russian?

Cavolo Nero (also called Tuscan kale or black kale) has long dark blue-green strap leaves, slightly bitter, holds up to long cooking — the classic for Italian beans-and-kale dishes. Curly Kale has tightly ruffled leaves, sweeter after frost, the hardiest of the three. Red Russian is tender with serrated red-tinged leaves, the best raw in salads but less winter-hardy than the others. Grow all three for variety.

When do I harvest kale?

From October when plants have substantial leaves, until the plant bolts in March or April. Pick outer leaves continuously rather than cutting the whole plant — the centre keeps producing through winter. After cold frosts the flavour sweetens noticeably; pre-frost leaves are coarser and slightly bitter.

Does kale really taste better after frost?

Yes — frost triggers the plant to convert starches into sugars as an antifreeze response, sweetening the leaves. The difference is real and noticeable in November-onwards leaves versus October leaves. It's the reason December kale tastes good and August kale tastes bitter.

Can I grow kale in containers in the UK?

Dwarf varieties (Dwarf Green Curled, Petit Posy crosses) do well in 40-litre containers. Full-size cavolo nero in containers is possible but underwhelms — kale wants deep roots. Containers on hard ground need rope-and-stake stability in autumn winds. Net against pigeons the same as ground plants.

Chou frisé

Brassica oleracea var. sabellica

Sow kale seed from mid-April to early June in a seedbed or modules; transplant to a sunny spot 45 cm apart from June onwards. Kale is very hardy (RHS H5–H6) and crops right through a UK winter — the leaves actually sweeten after frost. Pick outer leaves continuously from October to April; the plant keeps producing new growth from the centre. Cavolo Nero (black kale) is the classic Italian for Tuscan beans and kale crisps; Red Russian is more tender; Curly Kale shrugs off the worst weather. Pigeons are the main winter problem — net the plants between October and March or the birds will strip them. Slugs and cabbage white in summer; pigeons in winter; otherwise easy.

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