Agaricus bisporus var. hortensis

Portobello, Portabella, Champignon de Paris

Strain: M 7243

 M 7243 Champignon de Paris - Portobello - Portabella


  • commercialisation in open of closed form
  • resistant to mushroom diseases
  • excellent taste, beautiful color
  • very good storage


This heavy, brown-scaled mushroom with convex cap and at the base thickened stem is and remains one of the most appreciated mushroom-species.  Is successfully grown in caves as well as beds, and commercialised with closed cap as "Champignon de Paris” or with opened cap as "Portobello” or "Portabella". 



Recommended substrate

traditional or synthetic Agaricus-compost


9-10 litres spawn/ ton

humidity: 66-73%
N level: 1.5 à 1.8 %
level of ammonia: max. 0,05% (500 ppm)


compost temperature:

22-27 °C


14-17 days

CO2-concentration: 5000-12000
Casing soil humidity: 72-76 %
thickness: 4 à 5 cm
  • either deep ruffling, 3-6 days after casing
  • either apply cac-ing
Ripening phase room temperature: 22-27 °C
relative humidity: 92-99 %
CO2-concentration: 5000-12000 ppm

Fruiting induction (Champignon de Paris)


19- 21 °C

air temperature: 14-17 °C

relative humidity:

92- 99 %

CO2-concentration: 1100-1500 ppm
Fruiting induction (Portobello) temperature: 19- 21 °C
air temperature: 14-17 °C
relative humidity: 92- 99 % - heavier watering
CO2-concentration: 1500-2500 ppm


2 tot 6

Total production cycle

from the end of Incubation: 5 to 12 weeks

Average yield

23 à 28 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.