Plantes d’extérieur
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Organic seeds
Tourne-sol
Vigna unguiculata
Yardlong bean 'Liana' organic (Vigna unguiculata) produces green pods measuring 60 to 90 cm (2 to 3 ft) long that hang from tall climbing plants. In Tourne-Sol’s trials, this cultivar from Southern Exposure Seed Exchange was the clear winner: it appeared weeks earlier than every other variety and produced large quantities of delicious green pods. Packet BN554-a contains approximately 25 organic, open-pollinated seeds. Their flavour resembles green beans with a fresher, crisp edge that some compare to asparagus. The extraordinary pod length also creates a memorable vertical feature in an edible garden. These hanging pods are easy to recognize.
Direct sow outdoors after the last frost once the soil has warmed because the plants are frost tender. Tourne-Sol recommends starting outdoors and planting once per season. Install a tall, sturdy trellis before or at sowing time to support the vigorous vines and very long pods. The farm confirms outdoor production in zone 5. Performance in zone 4 remains uncertain on its product page; a warm, sheltered location or tunnel protection may extend favourable conditions without guaranteeing the same result. Check the support after wind and return displaced vines gently.
Harvest the green pods at approximately 45 cm (18 in) for the best flavour, then cook them thoroughly before serving. Frequent picking helps capture pods while they are still tender and crisp, before they become fibrous. Tourne-Sol does not list a number of days to maturity for ‘Liana’, so length, colour, and texture provide the most useful harvest indicators. Pods and beans should be eaten fully cooked, while the leaves and stems are not edible. To save seed, allow several pods to mature and dry completely on healthy plants. Label the dry seed clearly and store it away from moisture. Keep saved seed clearly labelled.
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