What to plant in Castille-La Mancha in October
October brings a sharp drop in temperatures to Castille-La Mancha with an average of 13.7°C, alongside the autumn rains providing 71.6 mm of precipitation. This climate allows the direct sowing of cold-hardy root crops, legumes, and alliums, as well as the outdoor transplanting of overwintering brassicas and leafy greens before winter frosts arrive in November and December.
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Sowing
Recommended sowing
Broad Beans
Sow directly outdoors 5 cm deep; establish root systems before November cold (t_min drops to 4°C).
Garlic
Plant cloves pointed end up, 3-4 cm deep in well-draining soil to prevent fungal issues from autumn rains.
Peas
Direct sow in rows; plants will slow vegetative growth as November approaches (t_avg 7.6°C).
Spinach
Sow directly in shallow drills; autumn temperatures support leaf growth without premature bolting.
Radish
Direct sow continuously in October to harvest before the sharp temperature decline in December (t_avg 5.1°C).
Carrots
Sow in loose, deep soil free of stones; germination takes 2-3 weeks under current 13.7°C average.
Turnip
Sow in well-worked soil; ready for harvest in late autumn or early winter.
Swiss Chard
Direct sow 1-2 cm deep; establishes hardy crowns before minimum temperatures drop to 4°C in November.
Seedlings
Seedlings
Cabbage
Transplant established seedlings 40-50 cm apart; firm soil around the base to protect against wind.
Broccoli
Set transplants out immediately so roots anchor before November's t_min of 4°C.
Leek
Transplant into deep trenches or holes, burying most of the white shank to promote blanching.
Onion
Space seedlings 10-15 cm apart in rows; avoid burying the bulb base too deep to reduce rot risk.
Tasks
Monthly tasks
Clear spent summer crop debris to reduce overwintering pest populations and fungal pathogens. Incorporate compost or well-rotted manure into vacant beds to prepare for winter and spring plantings. Apply a 5-7 cm layer of organic mulch around newly established seedlings to retain soil warmth and moderate the impact of approaching November frosts (t_min 4°C). Ensure garden beds have effective drainage channels to handle October's 71.6 mm of precipitation.