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Runner Bean Seeds, Black Knight
Description
(Phaseolus coccineus) Pole bean. A scrumptious edible ornamental with scarlet red blooms that yield inky black beans. The young tender pods make superior snap beans. Allow the pods to swell and the beans to mature and you will be rewarded with a culinary delight. The dried beans are a deep obsidian color, and their flavor and texture are fantastic!
- 65-80 days
- Full Sun
- Sprouts in 5-8 days
- Ideal Temperature: 60-85 Degrees F
- Seed Depth: 1”
- Plant Spacing: 8”
- Frost Hardy: No
Growing Tips, Tricks and FAQs
Growing Tips
Black Knight runner beans thrive in full sun with rich, well-drained soil. Incorporate organic matter like compost or well-rotted manure into the soil before planting. These beans benefit from consistent moisture, so regular watering is essential, especially during dry periods. Mulch to retain soil moisture and keep roots cool.
When to Grow
Plant Black Knight runner beans after the last frost date when soil temperatures are consistently warm. In mild climates, you can start seeds indoors 4-6 weeks before the last frost and transplant them outside after hardening off. For direct sowing, wait until late spring when the soil is adequately warmed.
How to Sow and Plant
Sow seeds 1 inch deep. Space plants about 8 inches apart in rows. If starting indoors, use biodegradable pots to minimize root disturbance during transplanting. Ensure seedlings are well-watered and kept in a sunny spot. Harden off seedlings for at least a week before transplanting them outside. Plants mature in 65-80 days.
How to Grow
Support vines with a trellis or other climbing structures. Regularly water the plants and use mulch to help retain soil moisture. Fertilize with a balanced or potassium-rich fertilizer once flowers appear. Avoid high-nitrogen fertilizers to prevent excessive foliage growth at the expense of bean production.
How to Save
This is a self-pollinating bean that can on occasion be insect pollinated. To prevent crossing between different runner bean varieties, isolate by 500 feet.
Allow pods to brown and dry. Beans are ready for saving when they are so hard that your fingernail cannot dent them.
Store in a cool, dark, dry place.
Runner bean vines also produce a tuber that can be dug in fall and saved over winter. This can be replanted in spring and plants will establish and bloom earlier.
FAQ
How do I support Black Knight runner beans?
Use trellises or other sturdy climbing structures. Ensure supports are tall enough, as the vines can reach significant heights.
What are common pests and diseases for Black Knight runner beans?
Common issues include aphids, slugs, snails, bean rust, and bacterial blight. Employ organic pest control methods and ensure good air circulation around plants to prevent diseases.
When should I harvest Black Knight runner beans?
Harvest pods when they are 6-8 inches long and tender for the best flavor. Regular harvesting encourages continued production. Mature pods can be left to dry for seed saving.
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