Agaricus bisporus

White Button Mushroom

Strain: M 7205

 M 7205 mycelia white button mushroom champignon blanc equivalent U3 Horst


  • Heavy, large mushroom with very good storage 
  • Very suitable for the fresh market


This strain produces mushrooms with large, evenly rounded caps which, according to the growing conditions, is smooth to slightly scaly.  The stem is white, cylindrical and straight.  Rather difficult species concerning the fructification, but in the adequate growing conditions this strain produces mushrooms of an excellent quality, with a very long shelf-life. 



Recommended substrate

traditional or synthetic Agaricus-compost


8-10 litre spawn / ton

humidity: 66-70%
N level: 2.2 à 2.4%
level of ammonia: max. 0,05% (500 ppm)


compost temperature:

23-27 °C


13-17 days

CO2-concentration: 5000-12000 ppm
Casing soil humidity: 72-76 %
thickness: 4 à 5 cm
  • either deep ruffling, 9-10 days after casing
  • either apply cac-ing
Ripening phase room temperature: 24- 28 °C
relative humidity: 95-99%
CO2-concentration: 5000-12000 ppm

Fruiting induction


19- 20 °C

air temperature: 17-18 °C

relative humidity:

90- 91 %

CO2-concentration: 800-1000 ppm


2 to 6

Total production cycle

from the end of incubation: 5 to 11 weeks

Average yield

27 à 31 kg/ m² at a fill weight of 90 kg/ m² fully grown compost

 Important remark: the cultivation guidelines in our technical data sheets are a compilation of the data given to us by experienced cultivators.  Individual differences in the cultivation conditions can seriously affect the results.