How to Grow Runner Beans

, written by Ann Marie Hendry gb flag

Runner beans on wigwams

We all know that beans are a musical fruit, or good for your heart, depending on which version of the rhyme you learned when you were a nipper, but in the UK at least no vegetable garden or allotment plot is complete without a wigwam foaming with scarlet-flowered runner beans.

The reason? Well, not only do they make a delectable vegetable, they are drop-dead gorgeous too.

Sowing and Growing Runner Beans

Runner beans were traditionally planted atop filled-in trenches dug the previous autumn and stocked with well-rotted manure or shredded newspaper. Kitchen waste will work too, because the main reason for doing this is to provide a deep, moist root run that will help runner beans to resist drought. Drought is a major enemy of beans, so avoid this at all costs.

Start sowing runner beans in spring and keep sowing every couple of weeks until early summer to spread out the harvest. Exactly when to sow will depend on your climate, so check out our Garden Planner for customised advice. The earliest seeds can be sown in modules or seed trays in a greenhouse, tunnel or on a sunny windowsill for transplanting later on.

Runner beans dislike cold soil, so wait until the soil has warmed to at least 10ºC (50ºF) before planting them out. You can warm soil a week or so in advance of sowing or planting using cold frames, cloches, horticultural fleece, or even just sheets of plastic.

Runner bean seedlings

Later sowings can be made directly where they are to grow, but beware of hungry slugs and make sure to protect seedlings from wind damage. Covering them with a cloche (even a recycled plastic bottle will do) will provide all the shelter they need until they establish.

In cool or windy locations you can protect plants and boost pod production by growing them to maturity in a greenhouse or tunnel – just make sure to ‘stop’ the plants, or pinch out the growing tips, when they near the roof.

While closely-related French beans are self-pollinating, runners need help from pollinators such as bees, so yields will be hampered by a wet, cold summer when insects are unlikely to be flying. A dry summer is bad news too, so make sure to water during rainless spells and mulch to preserve that moisture.

Beans are usually pretty trouble-free, but keep an eye out for black bean aphids infesting the growing tips. If this happens, clip off the tips and dispose of them.

Runner beans on a wigwam

Supporting Runner Beans

Get supports in place before planting your runners. Any frames or trellis need to be sturdy enough to support these lanky beans, which grow to well in excess of 2m (6.5 feet) tall and which will become extremely heavy when laden with pods. Netting is often used along with canes or poles to allow the vines to clamber about freely.

Bean wigwams look just as attractive in the flower garden as they do in the vegetable garden. Runner beans were originally grown purely as ornamental plants, so you can find exciting flower colour choices such as ‘Scarlet Runner’ or the ravishing red-lipped white flowers of ‘Painted Lady’.

You may need to tie young plants in to their supports initially, but once they’ve got a grip they should manage on their own. If they’re catching the wind they may need to be tied in at intervals.

A row of beautiful runner beans

When the plants reach the top of their supports, pinch out their growing tips to help divert energy into flower and pod production – and to avoid the plants turning into a jungle of tangled stems and foliage.

Such tall, leafy plants will cast shade, so plan your garden to include shade-loving crops behind your towering beanstalks.

Harvesting Runner Beans

Keeping up with weeding, watering and mulching is important while the beans are growing. Apply an occasional liquid feed too. Harvesting will commence around midsummer and continue until the first frosts. Runner beans will crop slightly later than French beans, so for variety and to extend the season it can be worth growing both.

Pick your beans while they’re still quite small to avoid any stringiness, though having said that modern cultivars are usually bred to be stringless. Pick at least every other day, because you’ll be astounded at how rapidly a bean pod can grow – they seem to go from flat to fat in the blink of an eye!

Runner bean pods

If you’re going to be away during the summer, invite friends and neighbours to help themselves to your beans to encourage continued cropping for when you return. Alternatively you could use the break as an opportunity to switch from producing fresh pods to maturing beans for drying. Gluts of the whole fresh pods can be chopped, blanched if you wish (I never do, I can’t tell the difference!) then frozen.

Beautiful, productive, and delicious – what more could a vegetable gardener ask for? Share your runner bean growing tips or favourite varieties with us in the comments section below.

Plants Related to this Article

Pests, Beneficial Insects and Plant Diseases

< All Guides

Garden Planning Apps

If you need help designing your vegetable garden, try our Vegetable Garden Planner (for PC & Mac) or if you'd prefer an app for your mobile or tablet device, our iPad & iPhone app Garden Plan Pro is available on the App Store here.
Garden Planning Apps and Software

Vegetable Garden Pest Warnings

Want to Receive Alerts When Pests are Heading Your Way?

If you've seen any pests or beneficial insects in your garden in the past few days please report them to The Big Bug Hunt and help create a warning system to alert you when bugs are heading your way.

Show Comments



Comments

 
"Can Runner beans be grown in containers? If so, how deep do they need to be. Id like to grow an edible privacy screen on my deck and thought these would be perfect "
Paula on Thursday 13 April 2017
"Hi Paula, I'd go for a container about 12 inches (30cm) deep to give your runners' roots plenty of room, and make sure to keep the soil moist."
Ann Marie Hendry on Friday 21 April 2017
"Great article-got a quick question...something keeps eating the flowers off my beans...?birds? I don't use chemicals, and can't see aphids on them, (probably down to the loads of birds my garden is home to). D'you think strips of flapping plastic might work? Sue."
sue on Friday 14 July 2017
"Hi Sue. Birds such as sparrows will sometimes peck the flowers off runner beans. You could try using strips of flapping plastic to frighten them off, or alternatively net your beans to keep them off altogether. We've got an article on keeping birds away from your crops that you might find interesting - type 'Bird Control in the Garden' in the search box at the top of the page."
Ann Marie Hendry on Tuesday 18 July 2017
"Why are my runner shrivling they are young beans about 3"long."
Chrissy on Tuesday 25 July 2017
"The containers I asked about earlier,did work well thanky out to Ann Marie Hendry for advice. However, White fly infested my runner beans. I didn't catch them in time and they completely decimated the vines. Garden centre thinks they possibly came off neighbours tropical outdoor plants. Can I reuse soil? How can I prevent future infestations that won't hurt beneficial insects? "
Paula on Tuesday 25 July 2017
"Hi Chrissy. I'd say there are two main contenders for why your little runners are shrivelling up: dry soil, or poor pollination. Runner beans do enjoy quite a lot of water, so if it's been dry where you are, this is a good bet. You may need to water heavily every day if dry weather persists. Paula, whitefly don't live out any of their life cycle in the soil, so the soil in your pots can be reused. It would be worth adding a few handfuls of fresh compost, potting soil or slow-release fertiliser to replenish it when you add the next crop. Growing flowers in pots near your vegetables will help to attract pest predators as well as pollinators, and they will help to control whitefly and other pests."
Ann Marie Hendry on Tuesday 25 July 2017
"This is a beginner's question too simple for the answer to appear in guides! HOW do I harvest runner beans? 1) Cut with secateurs or similar 2) Pull off at top of bean leaving stalk attached to plant 3) Pull off whole of stalk with bean, back to where it attaches to stem And whilst I am asking; having overbought at the adjacent church's plant sale I had to put 4 Runner beans and two tomatoes into a 20"x15"x10"High container. (Recycling bin from the last but 2 council scheme). All growing well. Beans 8ft high and lots of flowering; toms 4ft high and plenty little fruits appearing. But the tomato leafs are going brown. From googling I think either Early Blight or Magnesium deficiency. I have been keeping well watered but only fed a couple of times. And again today. Any tips? "
SteveP on Saturday 12 August 2017
"Hi Steve. Beans have to be harvested quite carefully because it's easy to accidentally yank the stem and break it (been there, done that!). You can snip the thin stalk that attaches the bean to the main stem with secateurs, but with practice you'll find that you can nip it off with your thumb and forefinger just above the top of the bean. It's a good idea to use two hands for this, especially at first - one to pluck, and the other to hold the stalk so it doesn't pull on the plant. If you're in the UK it's unlikely that your tomatoes are affected by early blight (though late blight is common here), but if the leaves are yellowing it could be a magnesium deficiency. We have an article called Troubleshooting Tomato Problems, which covers magnesium deficiency - use the search box at the top of this page to find it. I hope that helps!"
Ann Marie Hendry on Saturday 12 August 2017

Add a Comment

Add your own thoughts on the subject of this article:
(If you have difficulty using this form, please use our Contact Form to send us your comment, along with the title of this article.)

 
   
(We won't display this on the website or use it for marketing)



Captcha


(Please enter the code above to help prevent spam on this article)



By clicking 'Add Comment' you agree to our Terms and Conditions