What to sow in London in December
In December, London averages 7 °C, with nights around 4 °C.
Frosty nights are usual from November to March: the last frost typically comes in March.
A typical winter's coldest night: −3 °C.
Warm months (15 °C or more on average): June to September.
Sow outdoors
- Lettuce (Lactuca sativa)
- Spinach (Spinacia oleracea)
- Borage (Borago officinalis)
- Garden cress (Lepidium sativum)
- Mountain arnica (Arnica montana)
- Turnip-root chervil (Chaerophyllum bulbosum)
- Alfalfa (Medicago sativa)
- Phacelia tanacetifolia
- White mustard (Sinapis alba)
- White clover (Trifolium repens)
- Winter vetch (Vicia villosa)
- Chervil (Anthriscus cerefolium)
- Lavender (Lavandula angustifolia)
- Amatungulu (Carissa macrocarpa)
- Maca (Lepidium meyenii)
- Watercress (Nasturtium officinale)
- Sweet Chestnut (Castanea sativa)
- Caper (Capparis spinosa)
- Liquorice (Glycyrrhiza glabra)
- Sea-buckthorn (Hippophae rhamnoides)
- Pacific Silver Fir (Abies amabilis)
- Thymus maroccanus
- Breckland thyme (Thymus serpyllum)
- Indian shot (Canna indica)
Sow indoors
In pots or trays somewhere warm, to plant out later.
New next month, in January
- Celery (Apium graveolens)
- Endive (Cichorium endivia)
- Carrot (Daucus carota)
- French bean (Phaseolus vulgaris)
- Parsnip (Pastinaca sativa)
- Cape Gooseberry (Physalis peruviana)
- Brown mustard (Brassica juncea)
- Coriander (Coriandrum sativum)
- Dill (Anethum graveolens)
- Arrach (Atriplex hortensis)
- Pot marigold (Calendula officinalis)
- Mexican groundcherry (Physalis philadelphica)
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Month by month
Worked out from the last ten years of London's climate and each plant's needs: germination temperature, frost limit and time to harvest.