For production of mushrooms, substrates may be used, if they are composed only of the following components:

1. (a)

   farmyard manure and animal excrements:

   1. (i)

      either from holdings producing according to the organic production method;

   2. (ii)

      or referred to in Annex I, only when the product referred to in point (i) is not available; and when they do not exceed 25 % of the weight of total components of the substrate, excluding the covering material and any added water, before composting;

2. (b)

   products of agricultural origin, other than those referred to in point (a), from holdings producing according to organic production method;

3. (c)

   peat not chemically treated;

4. (d)

   wood, not treated with chemical products after felling;

5. (e)

   mineral products referred to in Annex I, water and soil.