Gardeners Guide · Grow your own
Broad beans are one of the few beans tough enough to be sown in autumn and left outside through a typical UK winter.
Choose a hardy variety, give the plants good drainage and a sheltered position, and an autumn sowing can give you an earlier harvest the following year.
They don’t need much attention during the coldest months. The aim isn’t to produce lots of winter growth, but to establish sturdy young plants ready to take off when temperatures rise in spring.
Here’s how to do it.
Broad Beans at a Glance
| Broad Beans | |
|---|---|
| Autumn sowing | October–November |
| Harvest | From late spring/early summer |
| Difficulty | Easy |
| Position | Full sun |
| Spacing | Around 20–25cm |
| Sowing depth | Around 5cm |
| Containers | Yes |
| Frost hardy | Hardy varieties tolerate cold conditions |
| Main winter problem | Waterlogging and severe weather |
Why Sow Broad Beans in Autumn?
Most broad beans can be sown in spring, so why start them before winter?
The main advantage is:
an earlier harvest.
Autumn-sown plants establish before winter and then sit relatively quietly through the coldest period.
As temperatures increase in spring, they already have an established root system and can begin growing rapidly.
This can potentially give you broad beans several weeks earlier than a spring sowing.
An earlier crop may also help you harvest before blackfly populations become particularly troublesome, although autumn sowing doesn’t guarantee you’ll avoid them.
When to Sow Broad Beans in Autumn
For much of the UK, autumn broad beans are commonly sown around:
October to November.
Exact timing depends on your local climate.
The aim is to give the seeds enough time to germinate and establish without producing excessive soft growth before severe winter weather.
In colder or very exposed areas, sowing into pots under protection can be safer than direct sowing outdoors.
Choose the Right Variety
This is important.
Not every broad bean variety is equally suitable for overwintering.
Look specifically for varieties described as:
suitable for autumn sowing or overwintering.
One of the classic choices is:
Aquadulce Claudia
Aquadulce Claudia is widely grown for autumn sowing.
It produces long pods and has good cold tolerance.
For a beginner wanting to experiment with overwintering broad beans, it’s one of the first varieties I’d consider.
Where to Grow Overwintering Broad Beans
Choose a position with:
full sun, shelter and good drainage.
Shelter becomes more important during winter because young plants can be battered by:
- Strong winds
- Heavy rain
- Snow
- Repeated freezing and thawing
A sunny position also helps the soil warm more quickly when spring arrives.
Good Drainage Is Essential
As with autumn-planted garlic, winter wet can be a bigger problem than winter cold.
Broad beans don’t want their roots sitting in saturated soil for weeks.
If you have heavy clay or ground that regularly becomes waterlogged, consider:
- Raised beds
- Large containers
- Starting plants in pots
- Improving drainage before sowing
Don’t automatically assume winter crops need lots of watering.
In much of the UK, rainfall provides more than enough.
Preparing the Soil
Broad beans prefer reasonably fertile soil.
Before sowing, remove weeds and incorporate some:
well-rotted compost or organic matter
if the soil needs improvement.
Avoid creating an excessively rich bed.
Broad beans belong to the legume family and don’t need huge quantities of high-nitrogen fertiliser.
How to Sow Broad Beans
Broad bean seeds are large and easy to handle, making them ideal for beginners.
Sow each bean approximately:
5cm deep
and around:
20–25cm apart.
If you’re growing several rows, leave enough room between them for:
- Airflow
- Harvesting
- Supporting the plants later
Water after sowing if the soil is dry.
Sowing Broad Beans in Double Rows
A traditional approach is to grow broad beans in double rows.
Create two rows relatively close together and leave a wider path before the next pair.
This can make supporting the plants easier later.
Once mature, broad beans can become surprisingly tall and heavy.
Starting Broad Beans in Pots
If your garden is particularly wet, exposed or cold, starting the beans in pots can be a good alternative.
Sow individual beans into:
deep pots or root trainers.
Keep them in a cold frame, unheated greenhouse or similarly protected position.
You don’t want to give them tropical conditions.
The aim is simply to protect them from the worst winter weather.
They can then be planted outside once conditions improve.
Growing Broad Beans in Containers
Broad beans can also be grown entirely in containers.
Choose:
- A large, deep container
- Good-quality compost
- A compact variety where possible
Make sure the container has plenty of drainage holes.
Pots can dry out more quickly than garden soil, so check moisture levels during prolonged dry spells.
What Happens During Winter?
Don’t expect spectacular growth.
That’s not the objective.
Plants may remain relatively small for weeks or months.
Cold weather slows growth dramatically.
As long as the plants remain healthy, that’s fine.
When temperatures rise and daylight increases, growth should accelerate.
Do Broad Beans Need Frost Protection?
Hardy autumn-sown varieties can tolerate cold conditions.
However, very severe frost, prolonged freezing conditions or exposed winds can still damage young plants.
If particularly harsh weather is forecast, you can use:
horticultural fleece
for additional protection.
In colder regions, growing under a cloche or starting plants under cover may be more reliable.
Protecting Broad Beans from Wind
Wind can cause more trouble as plants become taller.
Broad beans can become top-heavy and may eventually flop or snap.
A simple support system works well.
Place sturdy stakes around the crop and run garden twine around the outside.
As the plants grow, add additional horizontal levels of string.
This creates a simple framework that holds the plants together.
Do Broad Beans Need Watering in Winter?
Usually very little.
Natural rainfall is generally sufficient.
Only water if conditions have been unusually dry and the soil genuinely needs it.
Overwatering cold soil increases the risk of problems.
Spring Care
Once temperatures rise, your overwintered plants should begin growing much more rapidly.
At this point:
- Remove weeds
- Check supports
- Water during prolonged dry spells
- Inspect plants for pests
You generally don’t need to feed broad beans heavily if they’re growing in reasonably fertile soil.
Supporting Broad Beans
Don’t wait until the plants fall over.
Install support before they become tall and heavy.
One of the easiest methods is:
- Place stakes around the row.
- Run string around the plants at approximately 30cm high.
- Add another level as they grow.
- Add more if necessary.
You don’t need to tie every individual plant.
The string framework supports the crop as a group.
Broad Bean Flowers
Broad beans produce distinctive flowers, usually white with dark markings, although colour varies by variety.
They’re highly attractive to pollinating insects.
Successful pollination leads to the development of pods.
During dry spring weather, keep the plants adequately watered while they’re flowering and setting pods.
Blackfly
Black bean aphids, commonly called:
blackfly
are probably the best-known broad bean pest.
They gather around soft new growth, often near the top of the plant.
Small populations can be tolerated.
Natural predators include:
- Ladybirds
- Hoverfly larvae
- Lacewings
Once the plant has produced enough flowers, gardeners traditionally pinch out the soft growing tip.
This can make the plant less attractive to blackfly.
Pinching Out Broad Bean Tops
Once the lowest flowers have formed small pods, you can remove approximately:
7–10cm of the growing tip.
This can:
- Reduce blackfly problems
- Direct more energy towards pod development
The tender tips are also edible when healthy and can be cooked like leafy greens.
Slugs and Snails
Young broad bean seedlings can be damaged by slugs and snails.
Autumn and mild winter weather can provide ideal conditions for them.
Check young plants regularly.
Keep the surrounding area reasonably tidy and use your preferred wildlife-conscious slug-control method if damage becomes serious.
Mice and Other Animals
Broad bean seeds are attractive to mice and other animals.
Sometimes a row appears to have completely failed when the beans have actually been dug up and eaten.
If this repeatedly happens in your garden, starting seeds in pots under protection can be much more reliable.
Why Haven’t My Broad Beans Germinated?
Possible reasons include:
The seeds rotted
Cold, saturated soil can cause seeds to rot.
Animals ate them
Mice can remove newly planted beans.
Temperatures are very low
Germination will be slower.
Old seed
Poor-quality or old seed can have reduced germination.
If direct sowing repeatedly fails, try starting plants in pots.
Why Are My Broad Beans Turning Black?
Black marks can have several causes.
If the tips are covered in clusters of tiny insects, blackfly is likely.
Dark, damaged foliage after severe cold may instead be weather-related.
Check the plant carefully before deciding what treatment is needed.
When Will Autumn-Sown Broad Beans Flower?
Autumn-sown plants generally begin flowering during:
spring.
Exact timing varies considerably depending on:
- Variety
- Location
- Winter temperatures
- Sowing date
The flowers are followed by developing pods.
When Are Broad Beans Ready to Harvest?
Autumn-sown broad beans can potentially begin cropping from:
late spring into early summer.
Harvest timing depends on how you want to eat them.
For tender young beans, pick pods relatively early.
For larger beans, allow the pods to develop further.
How to Tell When Broad Beans Are Ready
Feel the pods.
You should be able to detect the beans developing inside.
For young beans, harvest while they’re still relatively small and tender.
Older beans become larger and starchier.
Regular picking encourages you to catch the pods at their best.
Can You Eat Broad Bean Pods?
Very young pods can be eaten whole when tender.
Once they become larger and tougher, they’re usually shelled.
The beans inside mature pods may also develop tougher outer skins.
These can be removed after cooking if desired.
Successional Sowing
You don’t have to choose between autumn and spring broad beans.
Try both.
Sow one crop in autumn.
Then sow another in spring.
This can extend your harvest considerably.
If harsh weather damages your autumn crop, the spring sowing also acts as useful insurance.
Broad Beans Through Autumn and Winter
| Period | What to do |
|---|---|
| October | Begin autumn sowing |
| November | Continue sowing hardy varieties |
| December | Check seedlings and drainage |
| January | Protect from severe weather if necessary |
| February | Weed and inspect supports |
| March | Growth begins accelerating |
| April | Support plants and watch for blackfly |
| May | Flowering and pod development |
| June | Harvest early crops |
| July | Finish harvesting later pods |
What You’ll Need
Broad beans don’t require much specialist equipment.
I’d recommend:
Broad bean seeds suitable for autumn sowing
Hand trowel
Well-rotted compost
Garden stakes
Garden twine
Horticultural fleece
Deep pots or root trainers if starting under cover
If your soil becomes waterlogged during winter, a raised bed can also make growing overwintering broad beans considerably easier.
Broad Bean Growing FAQs
Can broad beans be sown in autumn?
Yes. Hardy varieties can be sown during autumn for an earlier crop the following year.
What is the best broad bean for autumn sowing?
Aquadulce Claudia is one of the classic varieties for overwintering in the UK.
When should I sow autumn broad beans?
October and November are common sowing months, although local conditions matter.
Can broad beans survive frost?
Hardy varieties can tolerate frost, although very severe or prolonged cold can damage young plants.
Should I water broad beans during winter?
Usually very little. Natural rainfall is generally sufficient.
Can broad beans grow in pots?
Yes. Use a large, deep container with good drainage.
Why haven’t my broad beans germinated?
Cold waterlogged soil, mice, old seed or very low temperatures are possible causes.
Do broad beans need support?
Usually yes. Taller plants can become top-heavy, particularly in windy conditions.
When do autumn-sown broad beans crop?
They can potentially begin producing beans from late spring or early summer.
Can I sow more broad beans in spring?
Yes. Growing both autumn- and spring-sown crops is an excellent way to extend your harvest.
Final Thoughts
Broad beans are an excellent crop for keeping the vegetable garden productive through the colder part of the year.
The key is choosing:
a hardy variety intended for autumn sowing.
For beginners, Aquadulce Claudia is a very good place to start.
Sow the beans in October or November.
Choose somewhere sunny and sheltered.
Make sure the soil drains well.
Then don’t worry if very little appears to happen during winter.
The plants aren’t supposed to be racing upwards in January.
They’re establishing themselves.
When spring arrives, they’ll already have a head start over newly sown plants.
Keep them supported, watch for blackfly and harvest the pods while the beans are still tender.
For an even longer season, follow your autumn crop with another sowing in spring.
That way you can potentially have fresh broad beans arriving over a much longer period rather than everything being ready at once.
Continue Your Winter Growing
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