What to sow in Cardiff in December
In December, Cardiff averages 8 °C, with nights around 6 °C.
Frosty nights are usual from December to February: the last frost typically comes in February.
A typical winter's coldest night: −2 °C.
Warm months (15 °C or more on average): June to September.
Sow outdoors
- Lettuce (Lactuca sativa)
- Spinach (Spinacia oleracea)
- Brown mustard (Brassica juncea)
- Borage (Borago officinalis)
- Garden cress (Lepidium sativum)
- Mountain arnica (Arnica montana)
- Turnip-root chervil (Chaerophyllum bulbosum)
- Crown daisy (Glebionis coronaria)
- 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
Sow indoors
In pots or trays somewhere warm, to plant out later.
- Celery (Apium graveolens)
- Endive (Cichorium endivia)
- French bean (Phaseolus vulgaris)
- Parsnip (Pastinaca sativa)
- Coriander (Coriandrum sativum)
- Dill (Anethum graveolens)
- Arrach (Atriplex hortensis)
- Garden leek (Allium porrum)
New next month, in January
- Carrot (Daucus carota)
- Pea (Pisum sativum)
- Pot marigold (Calendula officinalis)
- Mexican groundcherry (Physalis philadelphica)
- Buckwheat (Fagopyrum esculentum)
- Cardoon (Cynara cardunculus)
- Hyssop (Hyssopus officinalis)
- Crimson Clover (Trifolium incarnatum)
- Macadamia nut (Macadamia integrifolia)
- Apple (Malus domestica)
- Banana passion (Passiflora mollissima)
- Walnut (Juglans regia)
Set Cardiff as your place in the app to see what to sow in your own garden, with your sowings and the weather. Set my place
Month by month
Worked out from the last ten years of Cardiff's climate and each plant's needs: germination temperature, frost limit and time to harvest.