Veg Patch jobs for September

Tidy, prep and sow

September is a turning point in the veg patch. You’re still enjoying the last of the summer harvests, but you can feel autumn creeping in with its cool mornings, shorter evenings, and the perennial question ‘is it too early to put the heating on?’.

1. Keep Sowing Where You Can

It’s easy to think September means the end of sowing, but there’s still plenty you can get in the ground. Hardy crops like spinach, winter lettuces, rocket, pak choi, lamb’s lettuce, spring onions, broad beans (for an early crop next year), and radishes can all be sown now for cut and come again leave over the winter period. If you have a greenhouse or polytunnel, use it to extend the season with salads and herbs.

1. Prepare Beds for Onions and Garlic

Onions and garlic are best planted in October, so now’s the time to prepare. Start by removing weeds, then dig in a good layer of well-rotted compost or manure to feed the soil and improve structure. If your soil is heavy clay, consider adding grit or sand to improve drainage—garlic in particular hates sitting in water over winter. A light scattering of wood ash (from untreated wood) can also help, as alliums enjoy slightly more alkaline conditions. If you have a wood burning stove the ashes will work well to help promote more alkaline condition. Taking the time now means your beds will be in perfect condition when planting day arrives.

2. Harvest Summer Crops

September is a generous month, and continuing to harvest summer crops keeps plants productive while making sure nothing goes to waste.

• Potatoes should be lifted and dried off before being stored in paper sacks somewhere cool, dark, and frost-free. Some people do leave potatoes in the ground – however I find they can suffer from critters nibbling away at them. So probably better to lift them as store them now.
• Tomatoes benefit from regular picking—this encourages the plants to ripen the remaining fruit. Store ripe ones in a cool place, or pick green ones to ripen indoors. Freeze or can for storage.
• Chillies can be frozen whole, threaded and dried, or turned into sauces for winter use.
• Melons are best eaten fresh, but they’ll keep in the fridge for a week or two.
• Apples can be stored in shallow trays in a cool shed or garage, checking regularly to remove any that start to spoil. Obviously they can be frozen for pie filling later or turned into apple cider vinegar.

By harvesting regularly, you’re making space in the beds for autumn and winter crops, while also reducing the risk of pests and diseases that thrive on forgotten, overripe fruit.

3. Clear Spent Crops and Mulch Beds

Once beans, courgettes, or sweetcorn have finished, remove the plants and compost them if they’re healthy. Then, mulch the bare soil with compost, well-rotted manure, or leaf mould. This not only adds nutrients back into the soil but also protects it from heavy rain, erosion, and compaction over winter. Worms and soil life will work the mulch down naturally, leaving you with healthier, easier-to-dig beds in spring

4. Sow Green Manure

If you’ve got beds that won’t be used over winter, consider sowing a green manure such as rye, vetch, or clover. You can buy ‘green manure ‘ seeds in any reputable garden centre or nursery. Green manure is fast-growing and acts as a living blanket for your soil, preventing weeds from taking hold and improving fertility. In spring, simply cut the growth down and dig them into the soil, where they’ll rot and provide a natural nutrient boost. Some green manures, like clover also fix nitrogen, making them particularly useful for the following year’s hungry crops. Don’t worry about digging them in too much if you are a no dig gardener. Generally green manure is easy to pull up if that works better for you or just cut them down leaving the roots and then plant you spring crops into the soil.

5. Tidy Perennials and Structures

• Cut back asparagus once the fronds turn brown to tidy the bed and prevent disease. The cut fronds can then be composted.
• Check supports for Brussels sprouts, kalettes, and any cabbages that are likely to get large and heavy. Technically supports should go in when you initially plant the seed or the plug plant. However, if you forgot put them in now but be careful not to damage the plant roots when you do.
• Prune back strawberry runners you don’t want, and tidy the plants for winter.
• Tie in any long canes or stems of blackberries, raspberries, or tayberries to prevent wind damage.
• If you grow rhubarb, now’s a good time to remove any old, tatty leaves and add some compost around the crowns.

A bit of care for perennials now helps them face the winter battering and ensures better crops next year.

6. General Maintenance

September is the perfect month for those small but important jobs that can easily be forgotten.

• Clear leaves and moss from paths to prevent slipping in the wet.
• Clean oil and sharpen tools. It’s good practice to perform this regular maintenance and September is the perfect time/
• Repair or replace damaged fences, gates, or water butts before winter weather makes things worse. It’s easier to do these tasks in the cool of late summer/early autumn as opposed to battling the January weather.
• Check sheds and compost bins for leaks, and patch them up.
• Lag outdoor taps or set up insulation to prevent freezing later on.
• As the need for the hosepipe lessens with the increased rainfall outside consider giving it a clean along with any attachments prior to packing it away for the winter.
• Turn and cover compost beds – turn while the weather is still reasonable and cover as you don’t want too much water in compost when it’s maturing.

All of these little jobs will save you trouble once the cold and wet really set in.

Garden Furniture and Delicate Items

Don’t forget the non-veg side of your garden. Bring in fairy lights, lanterns, and delicate ornaments that might not survive autumn gales or frosts. Secure or store garden furniture, parasols, and cushions—a sudden storm can do a surprising amount of damage. Even moving pots closer to walls or grouping them together can offer extra protection.

Greenhouse and Polytunnel Care

Your greenhouse or polytunnel can make a huge difference to how much you grow through autumn, so give it some love:

• Close doors at night to hold in warmth, but keep vents cracked during the day to reduce damp.
• Sweep paths and clean glass or plastic to maximise light.
• Mend any tears in polytunnel covers or cracks in greenhouse panes—autumn winds can make small problems much worse.
• Wash down benches and trays to reduce pests and disease.
• Remove weeds from under staging or pathways where slugs like to hide.

A well-maintained greenhouse will stay warmer, cleaner, and healthier through winter.

The Little Extras

There are always a few extra touches to think about:

• Pick herbs like basil, parsley, and mint, and dry or freeze them for winter use.
• Collect seeds from flowers and veg you’d like to grow again next year. Dry, store and don’t forget to label. For the importance of labelling see Labelling simple but vital
• Gather fallen leaves for the leaf mould pile—it’s free, rich mulch for future seasons.
• Dig out your waterproofs and wellies now and get them ready – you will undoubtedly need them!
• Plant spring bulbs in corners of the veg patch for a splash of colour early next year. Try some daffodils, tulips or alliums.
• Enjoy the last of the summer sunshine on the plot—it won’t be long before the days get much shorter.

Final Thoughts

September is all about balance: enjoying the abundance of summer while quietly getting ready for winter. Clearing, mulching, sowing, and tidying now will make life so much easier later. Plus, there’s something deeply satisfying about stepping into autumn knowing your plot is prepped, protected, and ready to keep producing. Winter may seem far off, but as every gardener knows, it sneaks up quickly—so best to be a step ahead

If you enjoyed this post or found it useful please consider subscribing to the solitaire gardener community. Subscribing is free and will keep you up to date with posts and exclusive content directly to your inbox. Just type your email address in the box below and hit the subscribe button.