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Vegetables to Sow in September for Autumn Growing
Introduction
September is a turning point in the gardening calendar. While summer crops are winding down, there’s still plenty you can grow to keep your allotment or garden productive. Sowing vegetables in September not only extends your harvest into autumn but also provides fresh, homegrown produce through the colder months. With the right varieties and protection, you can enjoy crisp salads, leafy greens, and even overwintering crops that will reward you in spring.
This guide covers the best vegetables to sow in September for autumn growing, with practical tips to help you succeed in UK conditions.
Why Sow Vegetables in September?
- Extend the growing season – keep harvests going after summer.
- Make use of space – fill gaps left by harvested crops.
- Grow hardier crops – ideal for salads, greens, and overwintering veg.
- Reduce food bills – fresh produce saves money during colder months.
- Prepare for spring – overwintered crops give a head start.
Vegetables to Sow in September
1. Spinach
- Quick-growing and hardy.
- Sow directly into soil or containers.
- Protect with fleece for winter harvests.
- Pick leaves regularly to encourage new growth.
2. Rocket
- Fast-growing salad crop.
- Sow in rows or scatter-sow for cut-and-come-again harvests.
- Best grown under cloches in colder regions.
- Harvest young leaves within 4–6 weeks.
3. Lettuce
- Choose hardy winter varieties such as ‘Arctic King’ or ‘Winter Gem’.
- Sow under cloches, cold frames, or in a greenhouse.
- Sow little and often for a steady supply.
- Protect from slugs and cold snaps.
4. Radishes
- One of the quickest crops you can grow.
- Sow little and often for small harvests into autumn.
- Best under cloches by late September.
- Ready to eat in as little as 4 weeks.
5. Spring Onions
- Sow varieties like ‘White Lisbon Winter Hardy’.
- Can be left to overwinter for early spring harvests.
- Sow directly in rows or containers.
6. Pak Choi
- Perfect for stir-fries and salads.
- Sow under cover or outdoors in mild areas.
- Prefers cooler autumn weather.
- Protect from pests with fleece.
7. Mizuna and Oriental Greens
- Hardy, fast-growing leafy veg.
- Ideal for cut-and-come-again harvests.
- Sow in modules or directly into the soil.
- Can be harvested throughout autumn and winter with protection.
8. Kale
- Sow dwarf or baby leaf varieties for quick autumn greens.
- Larger kale can be sown now and overwintered for spring growth.
- Very hardy and low maintenance.
9. Mustard Greens
- Strong-flavoured leaves great for salads or cooking.
- Sow outdoors or under cover.
- Grow quickly and can withstand cooler weather.
10. Broad Beans
- Sow hardy varieties such as ‘Aquadulce Claudia’.
- Sow in September–October for early crops next spring.
- Protect seedlings with cloches or fleece.
11. Peas
- Hardy varieties like ‘Meteor’ or ‘Kelvedon Wonder’.
- Sow in well-drained soil and cover for protection.
- Early crops ready in late spring.
12. Turnips
- Quick-growing roots and tasty greens.
- Sow directly in rows for a late autumn crop.
- Varieties such as ‘Tokyo Cross’ are ideal.
Tips for Sowing in September
- Use protection: Cloches, fleece, or cold frames help extend the season.
- Choose hardy varieties: Look for “winter hardy” or “cold-tolerant” on seed packets.
- Sow little and often: Stagger sowings to spread out harvests.
- Watch for slugs: Autumn can be wet, so protect seedlings.
- Try containers: Great for small gardens and easy to move to shelter.
Growing Under Cover
For gardeners with greenhouses, polytunnels, or cold frames, September sowings can thrive for longer. Salads, spinach, and oriental greens do especially well under cover, providing fresh pickings throughout autumn and into winter.
Conclusion
September is a fantastic month to keep your garden productive. By sowing hardy salads, leafy greens, root crops, and overwintering veg, you can enjoy homegrown produce well beyond summer. With the right protection and careful variety choices, your garden will continue to reward you through autumn, winter, and into the next spring.
Top 10 Questions About Sowing Vegetables in September
1. Is September too late to sow vegetables in the UK?
No — many hardy salads and greens thrive when sown in September.
2. What’s the quickest crop to sow in September?
Radishes — ready in as little as 4 weeks.
3. Can I still sow lettuce in September?
Yes, choose hardy winter varieties under cover.
4. Should I use cloches for September sowings?
Yes, they protect seedlings from frost and pests.
5. Can I sow broad beans in September?
Yes, hardy types like ‘Aquadulce Claudia’ can overwinter.
6. What salads grow best in autumn?
Rocket, mizuna, pak choi, and winter lettuces.
7. Can I grow peas over winter?
Yes, sow hardy peas in September for spring harvests.
8. What root crops can I sow in September?
Turnips and radishes are ideal.
9. Do I need a greenhouse to sow in September?
Not essential, but it extends the season for many crops.
10. Can I grow kale from a September sowing?
Yes, small plants will provide autumn greens and overwinter for spring.