How to Fertilize Cape primrose 'Ruby'?
Balanced feed every few weeks in active growth

Cape primrose 'Ruby' · Streptocarpus 'Ruby'
Grow as a houseplant in free-draining compost on an east or west-facing windowsill, or grow in a temperate or warm greenhouse in bright filtered light with shade from hot sun. Water sparingly as compost dries in winter and in the growing season water freely allowing compost to dry out between waterings; feed fortnightly with a high-potassium fertiliser. See Streptocarpus cultivation
Balanced feed every few weeks in active growth