Square dot

(Psophocarpus tetragonolobus)

• Type of vegetable : fruit (leaves, seeds and tubers can also be eaten)
• Optimum growth pH range : greater than 5.5
• Optimal growth temperature range : 18°C ​​(night) - 25 to 32°C (day)
• Organic matter needs : loves fertile soils
• Rooting : low
• Special requirements : perennial plant that does not tolerate root asphyxia with water requirements of the order of 1000 mm. Quantitative plant of short days (12h) but certain cultivars are insensitive to the length of the day. Tuber initiation is favored by cool conditions. Well adapted to equatorial climates.

• Seed characteristics

• Number of seeds per gram : 4
• Nursery : No
• Sowing depth : 30 - 40 mm
• Line spacing : 90 - 100 cm
• Interplant : 40 - 60 cm
• Remarks : Long conservation of seeds but scarification necessary for old seeds. Sow in beds in poorly drained areas.

• Seed germination time

Note: multiplication by tuber also possible.

• Duration of the crop cycle under optimal growing conditions

• Optimal conditions for storing green fruits

The seeds are easily stored, the tubers can be kept for up to two months.