How to Fertilize apple 'Red Devil'?
Feed fruit tree fertilizer twice yearly in spring and autumn

apple 'Red Devil' · Malus domestica 'Red Devil'
Thrives in deep, fertile, moist but well-drained soil in a sunny, sheltered position. Will not thrive on very acid soils, shallow chalk soils or with shade for more than half the day. Tree height will depend on the rootstock and training method. May require fruit thinning to improve fruit size and quality. See apple cultivation
Feed fruit tree fertilizer twice yearly in spring and autumn