How to Grow Runner beans UK
On this page
- Runner bean (Phaseolus coccineus)
- Regional Planting Calendar
- Quick Facts
- At a Glance
- Soil & Growing Conditions
- Growth Stages
- Harvest & Storage
- Diseases
- Pests
- Companion Planting
- Pollination
- Runner Beans, Cane to Pod
- Plan your Runner beans planting
- Growing Runner bean in another region
- References
- Frequently Asked Questions
In the UK, runner beans are sown mid May to late June, and planted out mid May to late June.
Timing is the decision that matters most in the UK: there are 4 separate regional planting out windows, ranging from mid May in Southern England to late May in Scotland.
The short answer
- Sow
- Mid May to late June
- Plant out
- Mid May to late June
- Site
- 6+ hours of sun
- Biggest risk
- Bean rust
Core growing advice on this page is checked against named horticultural sources — see References.
Runner bean (Phaseolus coccineus)
12 sources cited · Verified
Regional Planting Calendar
| Region | Sow | Plant out |
|---|---|---|
| Southern England | mid May to late June | mid May to late June |
| Midlands derived | late May to late June | late May to late June |
| Northern England | late May to late June | late May to late June |
| Scotland | late May to late June | late May to late June |
Rows marked derived are interpolated between regions our sources do state, because no source we consulted gives a figure for that region specifically. They are deliberately wider to reflect that uncertainty.
Southern England - detail & sources
RHS: soil must reach 12°C for germination, "usually by mid-May in the south of the UK". Directly sourced regional figure, not interpolated.
Midlands - detail & sources
DERIVED: interpolated midpoint between RHS's stated south (mid-May) and north (+2 weeks) figures; no Midlands-specific source exists.
Northern England - detail & sources
RHS: soil must reach 12°C for germination, "usually... two weeks later in the north" than the mid-May southern date. Directly sourced regional figure.
Scotland - detail & sources
RHS gives one figure for "the north" without splitting Northern England from Scotland; applied identically here rather than fabricating a further split. "usually... two weeks later in the north" than the mid-May southern date.
Quick Facts
| Factor | Value |
|---|---|
| Sunlight | 6-10 hours direct sun |
| Germination temp | 10°C |
| Optimal growing temp | 12-26°C |
| Minimum survivable temp | 5°C |
| Soil texture | RHS: fork in "lots of home-made garden compost or well-rotted manure - at least two bucketfuls per square metre/yard". Neither source states a soil texture requirement. |
| Drainage | RHS: a "sunny, sheltered position". |
| Lifecycle | tender annual; frost will damage plant tissue |
| Edible parts | pods |
At a Glance
Soil & Growing Conditions
Water: RHS: "regular watering is usually required, especially once they start to flower and form pods"; containers require "frequent and generous watering". Univ. of Maryland: "Keep the root zone moist by watering deeply and regularly during dry periods. Water more frequently when pods begin to develop". RHS gives a specific volume for pod set: water "giving 5-11 litres per sq m (1.1-2.2 gallons per 10 sq ft) twice a week"; "Lack of moisture at the roots" is the first listed cause of failure to set pods.
Growth Stages
| Stage | BBCH | Notes |
|---|---|---|
| Sowing & germination | 0 | Sow 5cm deep. Seed needs soil of at least 12°C to germinate and will not survive frost, so it is usually started indoors mid-April to May and planted out only after the last frost. RHS. |
| Establishment & support | 3 | Two seeds sown at the base of each cane outdoors, thinned to one. Climbing types need a support such as a double row of 2.5m canes with 45-60cm between the rows and plants 15-30cm apart within each row; dwarf varieties need only 30cm between plants and 50cm between rows. RHS. |
| Flowering & pod set | 6 | Cropping begins around midsummer. RHS. |
| Cropping | 8 | Continues for eight weeks or more provided pods are picked regularly, ideally every two to three days, while young, tender and stringless at about 20-25cm long. Letting pods mature stops the plant flowering and producing any more. RHS. |
Harvest & Storage
When to pick: RHS: pick pods "young, tender and stringless, about 20-25cm (8-10in) long. The pods should snap easily and the beans inside should still be small and pale in colour."
Storage
Univ. of Maryland: store beans "In a perforated plastic bag in the refrigerator for up to one week. Beans freeze well". RHS states no storage method.
Diseases
Pests
Companion Planting
Pollination
Pollinating insects (bees and other flower visitors)
RHS: runner beans depend on "pollinating insects" and bees to set pods. Causes of failure to set include "Lack of pollinating insects, perhaps because of cold, wet or windy weather" and "Very hot weather, especially at night, which inhibits the germination of pollen grains". Also listed: lack of moisture at the roots; acid soils below pH 6.5; "Nectar-robbing bumblebees" (noted as having "very limited effect"); "Birds, especially house sparrows, which peck at the flowers"; and infrequent harvesting -- "it is important to pick beans every two or three days, otherwise the pods will start to swell and set seed, which inhibits further pod production". Remedies: plant in a sheltered site to encourage bees, add organic matter, lime if pH is below 6.5, mulch, and on hot days water well in the morning and sometimes the evening to cool the plants. IMPORTANT NEGATIVE FINDING -- RHS: "Don't mist or spray the flowers with water (as used to be advocated) as this has not been shown to help pod-set and may deter bees."
Runner Beans, Cane to Pod
Plan your Runner beans planting
When to sow and plant Runner beans depends on your own frost dates. Check the UK vegetable planting calendar, or the month-by-month guides that cover Runner beans: May, June. To work out where it fits in your beds, sketch your plot in the free Garden Layout Planner.
Growing Runner bean in another region
Sowing dates, frost timing and local advice differ by country. Use the guide for where you garden.
References
-
Carries action thresholds rather than only descriptions: three thrips per flower may interfere with pollination and cause defectively shaped pods; corn earworm warrants treatment at 5% damaged pods or one larva per 3 ft of row; tarnished plant bug at one bug per 6 ft of row; stink bugs at one per 10 ft on snap beans and one per 15 ft on lima beans, which are more sensitive. Mexican bean beetle completes egg-to-adult in about a month with three generations a year, and Wade and Black Valentine are resistant or tolerant. Lesser cornstalk borer causes 30-50% stand loss on late plantings after 1 July on sandy soil in hot dry conditions. Spider mites can complete a generation in as few as eight days in hot dry weather.
12 independent sources are cited for this crop. Where they disagree - soil pH is the clearest case - every figure is preserved rather than averaged into false precision.
Frequently Asked Questions
When should I plant runner beans out in the UK?
In Southern England, from mid May. In Scotland, wait until late May. Treat these as a guide rather than a fixed date — the governing rule is to plant out only once frost risk has passed and temperatures are reliably warm enough.
When do I sow runner beans?
Sow mid May to late June, at around 10°C for germination.
What problems affect runner beans?
Our data links 3 diseases and 13 pests to this crop. See the sections above for each one and how to manage it.
Plan next season before the problems start
Most of the advice on this page comes down to timing and spacing — sowing at the right moment, rotating beds, and giving plants enough airflow. The UK Garden Planner lays your plot out month by month so those decisions are already made before the season starts.
Get the UK Garden Planner →Instant PDF download · Written for UK growing conditions
How this guide is put together
The growing data on this page — sowing windows, pests, diseases, soil and site requirements — comes from named horticultural sources, listed in References below, checked against RHS and Met Office guidance. An automated pipeline assembles that verified data into the page you're reading: it selects which facts to lead with and builds the surrounding prose and layout. It does not invent a date, a source or a number — where a verified value for a field isn't available, the page leaves it out rather than guessing. A person reviews and publishes each page; nothing goes live unverified.
Related Problem Guides
Last verified 2026-08-06
Where To Go From Here
Take this crop from reading into a written plan for your own beds.
Keep going
Plan the next step
Use the printable SoilCommander planner for your region to turn this guide into sowing dates, bed layouts and weekly garden tasks.