What to sow in Cardiff in August
In August, Cardiff averages 17 °C, with nights around 14 °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
- Onion (Allium cepa)
- Beet (Beta vulgaris)
- Endive (Cichorium endivia)
- Fennel (Foeniculum vulgare)
- Lettuce (Lactuca sativa)
- Radish (Raphanus sativus)
- Welsh onion (Allium fistulosum)
- Cabbage (Brassica oleracea)
- Chives (Allium schoenoprasum)
- French bean (Phaseolus vulgaris)
- Spinach (Spinacia oleracea)
- Rape (Brassica napus)
- Quinoa (Chenopodium quinoa)
- Brown mustard (Brassica juncea)
- Chinese chives (Allium tuberosum)
- Coriander (Coriandrum sativum)
- Dill (Anethum graveolens)
- Arrach (Atriplex hortensis)
- Borage (Borago officinalis)
- Pot marigold (Calendula officinalis)
- Garden cress (Lepidium sativum)
- Opium Poppy (Papaver somniferum)
- Mexican groundcherry (Physalis philadelphica)
- Foxtail millet (Setaria italica)
Sow indoors
In pots or trays somewhere warm, to plant out later.
New next month, in September
- Mountain arnica (Arnica montana)
- Lavender (Lavandula angustifolia)
- Amatungulu (Carissa macrocarpa)
- Canihua (Chenopodium pallidicaule)
- Maca (Lepidium meyenii)
- Sweet Chestnut (Castanea sativa)
- Caper (Capparis spinosa)
- Meadow saffron (Colchicum autumnale)
- Breckland thyme (Thymus serpyllum)
- Indian shot (Canna indica)
- Cape pondweed (Aponogeton distachyos)
- Biting Stonecrop (Sedum acre)
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.