A bean whose pods are measured in tens of centimeters. Yardlong bean, also known as asparagus bean or snake bean, is an Asian relative of the common bean with thin, hanging pods 30–60 cm long. They are fiberless, more delicate and sweeter than ordinary green beans, while the climbing, highly ornamental plant produces crops from the end of July until frost in a warm summer.
At a glance
- Pods: green, thin, 30–60 cm, fiberless
- Growth habit: climbing annual, 2–3 m, requires support
- Direct sowing / under cover: May
- Sowing for transplants: second half of April
- Harvest: end of July – October
- Position: very warm, sunny, sheltered from wind; polytunnel
- Difficulty: moderate – requires plenty of warmth
- Number of seeds per packet: approx. 35 (5 g)
What makes this variety stand out
Botanically, yardlong bean belongs to a completely different genus than common bean (Vigna, not Phaseolus) and is closely related to adzuki and mung beans. It originates from the tropics of South Asia, which explains its character: it loves heat and tolerates drought better than common beans, but does not tolerate cold at all. The pods grow in pairs from a single node, reach half a meter within a few days, and are harvested young, while they are still as thin as a pencil.
The pods have a delicate, slightly nutty flavor, with no fibers or “papery” shell. Less watery than green beans, they hold up excellently when stir-fried – this is a vegetable used in classic stir-fry dishes. In Central Europe, it is most reliable in a polytunnel or beside a south-facing wall; in open ground, it needs a truly warm summer.
Growing step by step
Sowing (May, outdoors or in a polytunnel): only once the soil has reached at least 15–18°C – usually after 15 May. Sow 2–3 seeds per spot, 2–3 cm deep, spacing plants 60–80 × 40 cm along supports. Germination takes 7–14 days.
Transplants (second half of April): to get ahead of the season, sow one seed per 8 cm pot at 22–25°C and plant out at the end of May, taking care – yardlong bean does not like its roots to be disturbed.
Supports: netting, stakes or strings 2–2.5 m high; in a polytunnel, train it like cucumbers. The stems twine around the support by themselves.
Care: water moderately at the base – the plant tolerates short periods of drought but not waterlogging. Mulching and a warm, sheltered position are essential. Nitrogen fertilization is unnecessary (it is a legume). Harvest the pods every 2–3 days when they are 30–50 cm long and still smooth, before the seeds become prominent.
Uses
Yardlong bean is a vegetable of Asian cuisine: stir-fried in a wok with garlic and ginger, used in curries, or prepared as “vegetable spaghetti” whole or cut like green beans – boiled, fried or blanched. It is also suitable for freezing and preserving. The plant is striking, with purplish flowers and long hanging pods on a pergola creating an exotic effect, while also providing good cover for a polytunnel wall.
Gardener’s tip
Yardlong bean reacts to cold immediately – seedlings in cold soil simply stop growing and turn yellow. Wait to sow until nighttime temperatures remain steadily above 10°C, and if growing outdoors, cover young plants with horticultural fleece for the first 2–3 weeks. Pick the pods young: overgrown pods lose their crispness and inhibit flowering.
Specifications
| Latin name | Vigna unguiculata subsp. sesquipedalis |
| Pod color | green |
| Height | 2–3 m (climbing plant) |
| Position | sunny, very warm, sheltered |
| Seasonality | annual plant |
| Sowing time under cover | second half of April (transplants) / May (polytunnel) |
| Direct sowing time | second half of May |
| Harvest time | end of July – October |
| Spacing | 60–80 × 40 cm |
| Net weight | 5 g (~35 seeds) |
| Series | Traditional |
| Manufacturer | W. Legutko |
| EAN code | 5903837426904 |