If you watched Monty Don on BBC Gardeners' World this November, you may have been reminded that gardening doesn't have to stop when the temperatures drop!
Broad beans are one of the few vegetables that can germinate in surprisingly cool soil, making them an excellent choice for autumn planting.
While much of the vegetable garden is winding down for winter, sowing a hardy variety of broad beans now could reward you with a delicious early harvest next May or June.
Here's how to get started.
Why sow broad beans in autumn?
Most gardeners associate sowing vegetable seeds with spring, but broad beans are different.
These hardy plants can germinate in soil temperatures as low as around 5°C, although germination will be slower in colder conditions.
By sowing in October or November, young plants can establish before the coldest winter weather arrives. Growth slows considerably during winter, but the plants are ready to get going again as temperatures rise in spring.
There are several advantages to autumn sowing:
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An earlier harvest: Enjoy fresh broad beans in late spring or early summer, often several weeks ahead of spring-sown crops.
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Make use of empty beds: Put part of your vegetable garden to productive use over winter.
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Get ahead of spring: One less seed-sowing job when the busy growing season begins.
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Support healthy soil: Broad beans are legumes, forming a relationship with soil bacteria that enables them to fix atmospheric nitrogen.
Which broad beans are best for autumn planting?
Not every variety is suitable for overwintering, so choosing the right seed is important.
One of the most reliable choices for UK gardeners is Broad Bean 'Aquadulce Claudia'.
This traditional, winter-hardy variety has earned the RHS Award of Garden Merit and is particularly well suited to sowing in October and November.
It produces long pods filled with tender, creamy beans and is an excellent choice for an early crop.
🌱 Discover Broad Bean 'Aquadulce Claudia' seeds at Natural Grower
How to sow broad beans in autumn
Broad beans are wonderfully straightforward to grow, making them a great choice for beginners and experienced gardeners alike.
1. Choose a sheltered spot
Select a sunny position with well-drained soil.
Broad beans tolerate cold conditions, but they dislike sitting in waterlogged ground. This is particularly important during wet British winters.
If your soil is heavy clay or tends to remain very wet, consider sowing in deep pots or modules under cover instead.
2. Prepare the soil
Remove weeds and gently loosen the soil before planting.
Adding well-rotted compost or organic matter can help improve soil structure, particularly where the ground is compacted.
Broad beans generally don't require heavy feeding because they can fix nitrogen through their root systems.
For gardeners looking to improve their vegetable beds naturally, Natural Grower's Peat-Free Multi-Purpose Compost can also be used to add organic matter to garden soil.
3. Sow your seeds
Broad bean seeds are large and easy to handle.
For autumn planting:
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Sowing depth: Approximately 5cm.
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Spacing between seeds: Around 20cm.
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Between double rows: Approximately 20–23cm.
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Between pairs of double rows: Around 60cm.
Sowing in double rows helps the plants support one another as they grow.
Place each seed into the soil, cover gently and firm the surface. Water lightly if the ground is dry.
4. Protect young plants over winter
Hardy broad beans can withstand cold weather, but prolonged severe frosts, strong winds and waterlogged soil can still cause problems.
In colder or exposed gardens, use horticultural fleece or cloches to provide additional protection during particularly cold spells.
Mice can also be troublesome, as they enjoy freshly sown broad bean seeds. If this is a problem in your garden, starting the seeds in pots or modules under cover may be more successful.
5. Let nature do its work!
Once established, broad beans generally need very little attention throughout winter.
Don't worry if growth appears to stop during the coldest months. As the soil warms in spring, the plants should begin growing more vigorously.
Taller varieties may need supporting with canes and garden twine as they develop.
Can I start broad beans in pots instead?
Absolutely!
If you have heavy soil, live in a particularly cold area or want to protect the seeds from hungry mice, sowing into pots is a useful alternative.
Use deep pots or modules filled with a well-draining, peat-free growing medium.
If using Natural Grower's Peat-Free Compost for seed sowing, we recommend mixing it approximately 50:50 with soil, sand or coir to create a suitable growing medium.
Sow one seed approximately 5cm deep in each pot and keep them somewhere cool and protected, such as an unheated greenhouse or cold frame.
Avoid leaving plants in small pots for too long. Once they are established, harden them off and plant outside when conditions are suitable.
Looking after your broad beans in spring
As the weather warms, your overwintered broad beans will begin growing more quickly.
Keep an eye on the following:
Support: Tall varieties benefit from canes and string to prevent wind damage.
Watering: Keep the soil adequately moist during flowering and pod development, especially in dry spring weather.
Blackfly: These small black aphids often gather on tender growing tips. Check plants regularly and encourage natural predators such as ladybirds. Pinching out infested growing tips once the first pods have formed can also help remove aphid colonies.
When can you harvest autumn-sown broad beans?
One of the biggest rewards of autumn sowing is the possibility of an earlier harvest.
Depending on your location, variety and winter weather, broad beans sown in October or November may be ready to pick from May or June.
For the sweetest, most tender beans, harvest while the seeds inside the pods are still young.
Fresh broad beans are delicious lightly steamed, tossed into salads, added to risottos or served with a little olive oil and fresh mint.
Is November too late to sow broad beans?
Not necessarily!
Early November is still a good time to sow hardy varieties such as 'Aquadulce Claudia', particularly in milder areas with well-drained soil.
However, if the ground is already frozen, very wet or your garden is particularly exposed, you may get better results from sowing under protection or waiting until late winter or early spring.
There's no need to rush seeds into unsuitable soil.
Give your vegetable garden a head start 🌱
Autumn gardening can be just as rewarding as spring gardening, and broad beans are a lovely reminder that there's always something to look forward to.
With a little preparation now, you could be picking your first delicious homegrown beans while other gardeners are only just getting started.
Why not sow a few rows this November and look forward to an early harvest next year?
🌱 SHOP BROAD BEAN 'AQUADULCE CLAUDIA' SEEDS
Happy growing from Natural Grower!
