Ferns from Seed

Collect the spore-fronds towards the end of summer,just as the spore-cases begin to open. Place them on a sheet of paper
in a box for a few days, keeping it in a dry place. Most of the spores
will fall out, the others may be rubbed out with the hand. These
spores will keep good a long time, but are best sown within a year.
Fill the pots with good heavy loam, water freely, and apply a coating
of charcoal, coarse sand, and sphragnum moss, rubbed through a fine
sieve. Damp the surface, sow the spores thinly, and cover with glass.
Keep the soil moist by standing the pots for a time each day up to
their rim in water. No surface water should be given. Stand the pots
in a warm, light place in the greenhouse, but keep them shaded from
the sun. When the surface is covered with growth, prick out into pans
or boxes, using a rich, light soil. When they are large enough pot
them off singly in thumb-pots, re-potting as soon as these are filled
with roots.