Which fertilizer is suitable for rhododendrons?
During the growing season, between April and October, it is a good idea to build up your rhododendron’s strength by providing additional nutrients. Ask the staff in your local garden centre for special rhododendron fertilizer. This is fertilizer enriched with magnesium or iron.
In autumn, you can prepare your rhododendron for winter by feeding it extra potassium. In spring, give it universal fertilizer. During long, dry periods in spring, watering more often is also advisable.