Brown Button Mushroom Grain Spawn

Brown Button Mushroom Grain Spawn

Lead time: < 4 Weeks
Incl. VATShipping calculated at checkout.

From the second your Urban Farm-It spawn hits your doorstep all the way to the saucepan, button mushrooms are a brilliant and simple place to start for anyone looking to grow or sell their own produce.

Our fresh living spawn is double-tested and axenic, meaning that it is free from all other competing species. You are guaranteed to get a harvest of healthy button mushrooms, and button mushrooms alone.

  • Suitable for hobbyists or professionals
  • A perfect venture for those looking at growing edible mushrooms
  • Naturally contain high levels of Vitamin D
  • Great way to reduce your supermarket waste
Agaricus bisporus
Inoculation Rate
8-10 litre spawn/ton
Recommended Substrate
traditional or synthetic Agaricus-compost
compost temperature: 23-27 °C; duration: 13-17 days; CO2-concentration: 5000-12000 ppm
Primordia Induction
(night time)* temperature: 20-21 °C; air temperature: 17-18 °C; relative humidity: 90-95 %; CO2-concentration: 1000-1200 ppm
number: 2 to 5; interval and conditions based on cultivation method
Total Production Cycle
from the end of incubation: 5 to 11 weeks
Average Yield
30 to 35 kg/m² at a fill weight of 90 kg/m² fully grown compost


Note: Please refer to the specific lead times shown on product pages for more accurate delivery times.

  1. Small Orders (E.g. 100ml Spawn, Plugs): Sent via Royal Mail large letters.
  2. Medium-Sized Orders (under 2kg): Royal Mail 24-48 hour tracked parcel.
  3. Large Orders (2kg+): via DPD Express.


  1. Standard Returns: Returns and exchanges within 14 days of receipt. The item must be unused and in its original packaging. See our returns policy here.

This does not apply to our Gift E-Cards, which are delivered via email.

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