Pods mature to an unusual purple black
Easy to spot and harvest
A decorative addition to the veg plot
Height Up to 300cm (118in)
Spread Up to 30cm (12in)
2 Options From£3.99 (
Your runner beans don’t have to be green! Runner Bean ‘Black Knight’ produces pods which start off green but mature to a purple black making them easy to spot and harvest. Attractive bright red flowers and juicy pods. Height: 3m (10'). Spread: 30cm (12").
1 Packet (20 seeds) (KC9411)
Sow runner bean seed indoors from mid April for transplanting later on, or direct sow outdoors from late May to July.
Indoors, sow seed at a depth of 5cm (2") in 7.5cm (3") pots or trays of free-draining, seed sowing compost. Place in a propagator or seal container inside a plastic bag at a temperature of 18-20C (64-68F) until germination which takes 7-10 days. Once germinated, grow runner beans on in cooler conditions until all risk of frost has passed and runner bean plants are large enough to be transplanted. Gradually acclimatise them to outdoor conditions over 7 - 10 days before planting runner beans outdoors in rich fertile, well drained soil in full sun or semi shade with protection from strong winds. Avoid freshly manured soil which will promote lush foliage instead of beans.
Alternatively direct sow runner beans outdoors at a depth of 5cm (2") and a distance of 30cm (12") apart. Plant runner beans in rows that are 1.5m (5') apart, or where space is limited, grow beans onto a wigwam structure. Runner beans require support from garden canes, strings or netting which should be put in place at the time of planting.
Seeds and garden supplies will normally be delivered within the time period stated against each product as detailed above. Plants, bulbs, corms, tubers, shrubs, trees, potatoes, etc. are delivered at the appropriate time for planting or potting on. Delivery times will be stated on the product page above, or in your order acknowledgement page and email.
Orders for packets of seed incur a delivery charge of £2.99.
Orders which include any other products will incur a delivery charge of £6.99.
Where an order includes both packets of seeds and other products, a maximum delivery charge of £7.99 will apply - regardless of the number of items ordered.
Large items may incur a higher delivery charge - this will be displayed in your shopping basket.
Please see our Delivery page for further details, and more information on different charges that may apply to certain destinations.
For more information on how we send your plants please visit our Helpful Guide on plant sizes.
Thompson & Morgan strives to ensure that all its plants are delivered to you in the perfect condition for planting. Sadly, the time it takes to deliver to certain locations in the UK means that we can't guarantee this, so regretfully we are unable to ship live plants to the following areas: HS, IV41-IV49, IV51, IV55-56, KW15-KW17, PA34, PA41-48, PA60-PA78, PA80, PH40-PH44, TR21-TR24, ZE1-ZE3