Appropriate fertilization of greenhouse grown sporophytes is necessary for consistent growth and production of fertile or spore-bearing fronds
In general, a low rate of fertilization is required for C-Fern and most other ferns. Good growth and fertile frond production can be achieved with PETERS® General Purpose Fertilizer (20-20-20, N-P-K). A solution of 9.6 g/10 gallons should be applied 1X weekly by saturating the pots or other containers . A regular watering schedule should also be maintained so that pots do not dry out. Different feed rates will give different levels of fertile versus vegetative frond production.