Full sowing calendar
Sowing calendar
What to sow in September
September is the last month where outdoor sowing genuinely pays off. Spinach and rocket sown in the first half are harvested in October and November; anything later overwinters and only grows on in February. Indoors the reverse begins: herbs moved to the windowsill now keep going for months.
Start indoors
Sow outdoors
Harvest now
- Growing basil on a windowsillMarch to June, indoors on the windowsill
- Sowing and growing radishes in a potMarch to September, resow every two weeks
- Growing loose-leaf lettuce in a pot or troughMarch to September, every three weeks
- Growing cherry tomatoes on a balconyStart indoors March to April, outdoors after mid-May
- Growing mint in a potSow April to June, or take cuttings year-round
- Growing spinach in a troughMarch to May and August to September
- Growing parsley in a potFebruary to April indoors, April to July outdoors
- Growing rocket in a troughMarch to May and August to September
- Growing microgreens: harvest in ten daysAll year round, a new tray weekly
Jobs this month
- Bring basil and other frost-tender herbs indoors.
- Sow spinach in the first half of the month for an autumn harvest.
- Reduce watering as temperatures drop.
Your own calendar
Cropsy builds a sowing calendar for your plants and your space, with reminders on the day it matters.
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