Rhododendrons are light feeders, so we recommend slow acting fertilizers which will not scorch the leaves when used as directed. Miracle-Gro Slow Release Fertilizer lasts the whole season and is very convenient. We developed our own slow release Rhododendron feed for best growth in the nursery. It's a great product which lasts 3 months and now our customers love it! Liquid feeds are excellent for quickly greening up any poor looking plants. Other products shown are useful to correct deficiencies in your soil.