Standard C-Fern sowing density is 300 spores/dish (60x15 mm Petri dish). This standard sowing density gives much more consistent results with respect to the ratio (or proportion of male to hermaphroditic gametophytes). Density can be reduce by adding more water before sowing or by using fewer drops of the spore suspension (1 -3). If fewer drops of the spore suspension are used, substitute drops of plain sterile water to still allow adequate spreading of spores.