White Elm Oyster Mushroom Grain Spawn

White Elm Oyster Mushroom Grain Spawn

Lead time: 2-10 Days (Business Days)
Incl. VATShipping calculated at checkout.

Select Substrate (+£5.99)

Chopped Wheat Straw

Select Growing Bag (+£8.99)

Oyster Mushroom Growing Bags

White Elm Oyster Mushrooms are a North American variety with a strong woody flavour and are an excellent addition to any soup or stir fry.

Our spawn is stored in optimum conditions using specialist breathable bags. This means that the organism is always at its healthiest and ready for inoculation.

  • The ideal growing conditions for white elm oyster mushrooms are: 13-20 C
  • We recommend a storage temperature of no higher than 5 C
  • First harvest: 3-5 weeks
  • Typically harvest <1.5kg over 3-5 flushes
Pleurotus ostreatus var. Florida
Inoculation Rate
Mix with ± 1-10% spawn
Recommended Substrate
Hardwood / (wheat) straw
room temperature: 20-22°C; substrate temperature: 25-30°C; duration: 12-14 days
Primordia Induction
(night time)* temperature: lower to 6-15°C; relative humidity: 90-95%
Fruiting Conditions
room temperature: 13-20°C; relative humidity: 85%; CO2-concentration: less than 1000ppm; light: 800-1500 lux
Number: 2-3; interval: 8-10 days; between flushes: relative humidity increase to 90-95%
Total Production Cycle
Ca. 3 months
Average Yield
200 to 250 g saleable mushrooms per kg fresh substrate


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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