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Water Chestnut (Singhara)KharifFarmer-saved tuber/seedling (local biotype)Updated 7 September 2026

Local Green-spined biotype

A second common farmer-saved biotype grown alongside the red-spined type in many of the same ponds, including Kashmir's Dal Lake, with a greener nut regarded locally as slightly milder in taste.

SeasonKharif
Maturity period~6–7 months
Expected yield20–30 q/ha, pond-dependent
Suitable soilPond/diked-field silt (standing water)

Quick facts

Crop
Water Chestnut (Singhara)
Type
Farmer-saved tuber/seedling (local biotype)
Season
Kharif
Maturity period
~6–7 months
Expected yield
20–30 q/ha, pond-dependent
Suitable soil
Pond/diked-field silt (standing water)

About this variety

The Local Green-spined biotype is grown widely alongside the red-spined type across singhara-growing ponds in Bihar, eastern Uttar Pradesh, West Bengal and, notably, the traditional boat-family fishery of Kashmir's Dal and Wular Lakes. Like the red-spined type it is propagated informally from farmer-saved tubers or self-sown seedlings rather than through any certified seed channel — there is no institute-released, branded green-spined cultivar. Growers in some areas describe the green-spined nut as slightly milder and less starchy in taste than the red-spined type, though this is a matter of local preference and market habit rather than a documented, measured difference.

Key characteristics

    Plant typeFarmer-saved tuber/seedling (local biotype)
    Maturity~6–7 months
    Yield potential20–30 q/ha, pond-dependent
    Disease resistanceNot formally documented
    SoilPond/diked-field silt (standing water)
    SeasonKharif

Yield & maturity

Maturity period

~6–7 months

Expected yield

20–30 q/ha, pond-dependent

Actual yield depends on sowing time, soil, irrigation, weather, seed quality and crop management.

Pest & disease considerations

Major diseases

  • Not formally documented

Advantages & considerations

Why farmers may choose it

  • Well established in both the Bihar–Bengal belt and Kashmir's Dal Lake fishery, giving a genuinely wide track record across two very different growing regions.
  • Regarded locally as a milder-tasting option worth offering alongside the red-spined type for buyer variety.

Things to consider

  • No formal quality guarantee or institutional seed source — sourcing depends entirely on local growers or ponds.
  • The mild-taste distinction from the red-spined type is anecdotal, not measured in published research.

Suitable regions

States this variety is recommended for — check locally, since a state can have more than one recommended zone.

  • Bihar
  • Uttar Pradesh
  • West Bengal
  • Jammu and Kashmir