Intermediate Wood Fern ...... 200 Spores Intermediate Wood Fern ..... 200+ Spores This listing is for 200+ spores from the Intermediate Wood Fern, Dryopteris intermedia. The Intermediate Wood Fern will reach from 24" to 36" tall and prefers to grow in open moist woods. Planting Instructions - Spread the spores on the surface of a humus-rich sterilized soil and cover with plastic to retain moisture. For more detailed information please send me a message and I'll provide you with links to a selection of excellent step by step instructions.