Azaleas are flowering perennials that are rather hardy, but they do require some care, especially as they grow older. Restoring the health and vitality of old azaleas is a multiple-step process. Your old azalea needs a boost of nutrients, plenty of moisture and pruning. Older azaleas can become overgrown, spindly and even become covered in moss. Your main objective in restoring your old azalea is to remove old and dead growth to encourage new, healthy growth.
Things You'll Need
- Pruning shears or loppers
- Copper-based fungicide
- All-purpose fertilizer
- Organic mulch
- Soil pH test kit (optional)
- Lime, peat moss or aluminum sulfate (optional)
Cut away all dead, overgrown or weak branches in late winter or early spring. Prune half of the oldest limbs and shoots down to the ground. Apply a copper-based fungicide to the wounds.
Feed your old azaleas a full dose of all-purpose fertilizer in June, in August and again in October. Follow the dosage instructions on the package.
Water once every week or two weeks to keep the soil moistened. Spread a thick, 3- to 4-inch layer of organic mulch around the base of the plant, covering the root system.
Trim back spent flowers and stems down to the next set of buds in late spring or early summer, right after the azalea finishes blooming.