How to Fertilize begonia 'Silver Queen'?
Weak balanced feed every few weeks in growth season

begonia 'Silver Queen' · Begonia 'Silver Queen'
Under glass grow in light, well-drained loam-based or loam-less potting compost in bright filtered light with shade from hot sun at an optimum of 19°C. Water moderately when in growth and apply a balanced liquid fertiliser at alternative waterings. Keep barely moist over winter. See Begonias: houseplants for further advice.
Weak balanced feed every few weeks in growth season