when to fertilize rhododendrons northwest

Best answer


Early spring

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  • When should I fertilize my Rhododendron?

  • You can start fertilizing rhododendron bushes at planting time, and do it again in early spring as flower buds swell. Use a light hand, since applying too much rhododendron fertilizer can do more harm than good. Sprinkle on once again very lightly at leaf emergence if the new leaves look pale.

  • When should I fertilize my azaleas in South Africa?

  • In less fertile soils, a complete fertilizer designed for acid-loving plants may be applied in late winter or early spring. Be careful to use only the amounts recommended for rhododendrons and azaleas, which do not need as much fertilizer as other plants.

  • When should you prune rhododendrons and azaleas?

  • If you have older shrubs that have grown spindly, you can rejuvenate them by heavy pruning. The best time to prune these plants is soon after flowering, so not to interfere with flower bud formation for the following year. Rhododendrons and azaleas prefer slightly acid soils.

  • What is the best fertilizer for azaleas and rhododendrons?

  • You may notice some fertilizers in the garden store specifically for azaleas and rhododendrons. These specialty fertilizers are formulated with ammonium sulfate to acidify the soil at the same time as providing nitrogen. If your soil is naturally acid, no need to buy these expensive specialty products for feeding your rhodies.

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