Humber Avenue Community Allotments

Sowing and Planting – Time Line suggestion

This is a general guide to planting and sowing times for a garden in the South of England. Weather permitting of course !

January

The month of waiting for longer and warmer days. Prepare seeds trays and pots for sowing next month.

February

Best start date is after Valentines Day when light is increasing at last, and fast.

Sow undercover broad beans, spinach, lettuce, peas for shoots, onion, salad onion, early brassicas (cabbage, calabrese, kohlrabi, cauliflower, turnips), radish, bulb fennel, parsley, coriander, dill. With warmth aubergine, pepper, chilli – sow these by early March

Sow outside broad beans, garlic if not already done

March

Sow undercover as for February plus peas, Boltardy beetroot, celery & celeriac mid month. With warmth tomatoes – sow before mid month for undercover cropping, melon at month’s end

Sow outside broad beans, garlic if not already, and after mid month sow lettuce, spinach, peas, onion, salad onion, early brassicas, parsley, coriander, dill, parsnips, first early potato late March.

April

Sow undercover as for March (except its getting late for celeriac, sow asap), leeks, leaf beet, beetroot (all varieties), chard at month’s end, tomatoes for outdoor growing. With warmth and around mid month, cucumber, courgette, squash, sweetcorn

Sow outside all potatoes, broad beans, lettuce, spinach, peas, salad onion, early and autumn brassicas, parsley, leeks, leaf beet, carrots

May

Sow undercover Courgette, French and climbing beans, leaf beet, beetroot, chard, lettuce, winter brassicas, salad onion. Plus leeks and winter squash by early May.

Swede at end May

Sow outside same as undercover, also maincrop potatoes in early May, carrots, parsnips but keep seedbed moist until germinated.

June

Sow undercover beetroot, swede, lettuce, leaf beet, chard, kale, purple sprouting broccoli, cauliflower for both autumn & spring, calabrese for autumn harvests.

After solstice sow endive, chicory, kohlrabi and Florence fennel.

Sow outside same as undercover, also carrots.

July

Sow undercover Kohlrabi, lettuce, leaf beet, chard, endive, chicory, Florence fennel, chervil, coriander. Plus beetroot and savoy cabbage in first week.

After mid month, land cress, wild rocket, Chinese cabbage and spinach.

At month’s end, mustards, pak choi, salad rocket, turnips – though first week August is often better.

Sow outside same as undercover, and carrots until mid July.

August

Sow undercover endive and Florence fennel until 10th, lettuce (late August sowings to overwinter as small plants), claytonia, oriental leaves, salad rocket, turnips multisown and true spinach.

August is fantastic for sowing salad rocket, oriental leaves and spinach. Sow by mid month in order to have vigorous harvests through autumn, sow late month for smaller plants in autumn that may overwinter more strongly.

  • chervil – coriander – dill – land cress – wild rocket -spinach by mid August for autumn cropping,
  • any salads in mid August for planting September and to grow under a cloche,
  • spinach – spring onion –  spring cabbage late August for overwintering small.

Sow outside same as undercover but approximately a week earlier

September

Sow undercover 

  • For outdoor planting to crop in autumn/winter lambs lettuce, mizuna, salad rocket,
  • For outdoor planting to overwinter small, in early September sow lettuce, spinach, chervil, coriander, dill.
  • For undercover planting sow in early to mid September all salads (includes spinach, chard mustards, kale etc which you can grow large for cooking), spring onion.

Sow outside same as undercover but a week earlier, last salad sowings by 10th September.

October

Outside sow garlic. You can also sow onion sets though I recommend caution with these as they risk harbouring mildew over winter which infects onions in May and thus reduces growth/storage potential of spring-sown onions. Spring onions sown in August, White Lisbon type, seem less prone to this.

November

Last sowings

From early November its worth sowing broad beans to overwinter as small plants, such as Aquadulce Claudia and Monica; sowing in December is possible too, both undercover (unheated) and outside, likewise for garlic.

December

Feet up !

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