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MushroomRabiSpawn (hybrid strain)Updated 23 September 2026

S-11 (Button Mushroom)

One of the most widely cultivated button mushroom strains in India, along with U-3 and imported strains such as Horst H3 — grown commercially in the organised cold-room sector as well as by smaller composting units.

SeasonRabi
Maturity period6–7 weeks to first flush (after 2–3 weeks of composting)
Expected yield10–15 kg fresh mushroom/sq.ft of compost bed
Suitable soilGrown on a composted wheat-straw/poultry-manure/gypsum substrate, not soil

Quick facts

Crop
Mushroom
Type
Spawn (hybrid strain)
Season
Rabi
Maturity period
6–7 weeks to first flush (after 2–3 weeks of composting)
Expected yield
10–15 kg fresh mushroom/sq.ft of compost bed
Suitable soil
Grown on a composted wheat-straw/poultry-manure/gypsum substrate, not soil
Release
A long-established commercial strain in the Indian mushroom trade; not tied to a single recent institute release date

About this variety

S-11 is a widely used commercial hybrid strain of white button mushroom (Agaricus bisporus) in India, valued for consistent cropping on a well-prepared wheat-straw compost under the cool, controlled conditions button mushroom needs. Like other button strains, it is not grown from true seed but from spawn — grain fully colonised with the mushroom mycelium — spawned into pasteurised compost and cased with a soil-and-lime layer before fruiting.

Key characteristics

    Plant typeSpawn (hybrid strain)
    Maturity6–7 weeks to first flush (after 2–3 weeks of composting)
    Yield potential10–15 kg fresh mushroom/sq.ft of compost bed
    Disease resistanceNo special disease resistance claimed; needs careful compost and room hygiene against wet/dry bubble
    SoilGrown on a composted wheat-straw/poultry-manure/gypsum substrate, not soil
    SeasonRabi

Sowing & cultivation

  • SpacingStandard compost-bed cropping: 10–15 kg compost/sq.ft of bed area, cased and cropped in the same bed

Yield & maturity

Maturity period

6–7 weeks to first flush (after 2–3 weeks of composting)

Expected yield

10–15 kg fresh mushroom/sq.ft of compost bed

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

Pest & disease considerations

Major diseases

  • No special disease resistance claimed; needs careful compost and room hygiene against wet/dry bubble

Advantages & considerations

Why farmers may choose it

  • Consistent, reliable cropping on standard wheat-straw compost
  • Well understood by Indian growers and spawn labs — widely available and widely documented

Things to consider

  • Needs a proper composting set-up and a cooler, controlled fruiting room — not a low-equipment beginner crop the way oyster mushroom is
  • No special disease resistance — good compost pasteurisation and casing hygiene decide the outcome as much as the strain itself

Suitable regions

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

  • Himachal Pradesh
  • Punjab
  • Haryana
  • Uttar Pradesh
  • Tamil Nadu