Why Autumn Matters in the Garden
Many gardeners wind down as summer fades, but autumn is actually one of the most important seasons for a productive plot. The work you do between September and November — clearing beds, improving soil, planting garlic, protecting tender plants — directly determines how well your garden performs the following year.
September: Harvest, Sow, and Start Tidying
Harvest
- Lift mainc crop potatoes before the soil turns cold and wet. Leave them to dry in the sun for a few hours before storing in hessian sacks or paper bags in a cool, dark, frost-free place.
- Harvest winter squash and pumpkins once the skin is fully hardened — test by pressing your thumbnail gently against the surface. Cure them in a warm spot for 10–14 days to toughen the skin before storing.
- Pick the last of the outdoor tomatoes and bring green ones indoors to ripen on a windowsill.
- Harvest apples as they ripen — the fruit should come away easily when gently lifted and twisted.
Sowing
- Sow autumn/overwintering salad leaves (lamb's lettuce, mizuna, winter purslane) in a cold frame or polytunnel for harvests through to spring.
- Sow green manures (e.g. phacelia, winter field beans, mustard) on empty beds to protect soil from erosion and add organic matter when dug in next spring.
- Sow broad beans of an overwintering variety (e.g. 'Aquadulce Claudia') for an early crop next summer.
October: Soil Work and Planting for Next Year
Improve Your Soil
October is the ideal time to add organic matter to vacant beds. Spread a generous layer (5–10cm) of well-rotted manure or compost across the surface and let winter rain and frost work it in, or dig it in lightly. This is far better than leaving bare soil exposed to the elements all winter.
Plant Garlic and Onion Sets
Garlic planted in October to early December will establish roots before winter and produce far bigger, better-flavoured bulbs than spring-planted garlic. Break bulbs into individual cloves and plant 15cm apart, pointed tip just below the surface. Overwintering onion sets can also go in now.
Clear and Compost
- Pull up and compost the remains of finished crops (beans, courgettes, sweetcorn) — except any diseased material, which should be binned.
- Cut down asparagus ferns to the ground once they turn yellow.
- Lift and store dahlias and other tender tubers before the first hard frost.
November: Protect, Prune, and Plan
Protect Tender Plants
- Mulch the crowns of tender perennials (artichokes, outdoor ginger) with a thick layer of straw or bracken to protect from frost.
- Cover brassicas with fine netting to protect against pigeons, which become a significant pest once other food sources dry up.
- Move any container-grown tender plants (citrus, figs in cold climates) into a frost-free greenhouse or conservatory.
Winter Pruning
Once apple and pear trees have dropped their leaves, winter pruning can begin. This is also a good time to prune gooseberries and currant bushes — removing old, unproductive wood and opening up the centre of the bush to improve airflow and light penetration.
Plan for Next Year
The quiet months are perfect for reviewing what worked this season and what didn't. Sketch out your crop rotation plan — moving brassica, legume, root, and allium families to different beds each year to reduce the build-up of pests and diseases. Order seeds from catalogues while the best varieties are still available.
Quick Autumn Checklist at a Glance
- Harvest and store root crops, squash, and apples
- Sow green manures on empty beds
- Plant garlic and overwintering onion sets
- Add compost or manure to vegetable beds
- Clear spent crops and add to compost heap
- Net brassicas against pigeons
- Begin winter pruning of fruit trees and bushes
- Plan crop rotation and order seeds for next year
A productive autumn sets the foundation for a thriving growing season ahead. Little and often is the key — spread the work across weekends and it's entirely manageable, even rewarding.