Take 1 fistful of vermicompost or cowmanure, Take 1 fistful of mix fertilizer (bonemeal, sterameal, hornmeal, mustard fertilizer), Take 1 fistful of coffee ground.
Mix them all and apply once in every month.
Provide them only morning direct sunlight of 2hours from 8 am to 10 am.
Water everyday but don't overwater. Don't water on the leaves.
