Learn how to plant, grow, and care for rhododendron and azalea shrubs with this planting guide from The Old Farmer's Almanac. Rhododendrons have very shallow roots, which means they take well to transplanting. It also means, however, that you have to take care not to plant them too deep. Discover Pinterest’s best ideas and inspiration for Rhododendroncare.Rhododendrons Full Growing Guide: How to Plant, Grow, and Care for Rhododendrons. Rhododendrons are relatively easy to care for. However, they do require some attention from you at certain times of the year. We reveal what you should pay attention to when caring for them. Dead Heading. What you need to do is gently snip out the seed pod with a pair of scissors taking great care to avoid cutting any of the new growth at the same time. A rhododendron is a garden plant that originates from South and South-East Asia. This ornamental plant is hardy and easy to care for. You’ll recognise it as an evergreen bush or shrub. How to care for your rhododendron. It is important to remember that this plant is naturally adapted to very dry conditions, so you can let it dry out considerably between waterings. Here you’ll find the best tips for rhododendroncare, including how to plant rhododendrons and the best soil to use!