Rhododendrons like soil with a high amount of organic matter and mulch, so when planting or transplanting add bark dust, steer manure, or compost to the soil if it is not already very rich in organic ...

Q:I've heard that applying worm castings to the soil is an effective treatment for thrips on rhododendrons. Do you agree? If so, how thick should the layer be and is there an ideal season for it?

Rhododendrons are evergreen shrubs that produce stunning spring blooms. Learn more about rhododendrons, their care, and ways ...