Rhododendron is one of our most beloved garden shrubs – and it is easy to understand why. With its large, vibrant flowers and lush foliage, it creates a sense of magic in both small and large gardens. In addition, rhododendron is a relatively easy plant to care for once it has had the right start.
Rhododendron often blooms in spring and early summer, offering flowers in shades ranging from white and pink to purple and deep red. The shrub is also evergreen, meaning it brings life to the garden all year round.
It is perfect for borders, as a specimen shrub, or planted in larger groups for a stunning floral display.
How to plant rhododendron
1. Choose the right location
Rhododendron thrives best in partial shade, preferably where it receives morning sun but is protected from strong afternoon sunlight. It also likes to be sheltered from harsh winds.
2. The right soil is the key
The most important thing for rhododendron is acidic, loose soil, ideally similar to woodland soil. Ordinary garden soil is often too compact or too rich in lime.
Use preferably:
-
rhododendron compost
-
peat-based soil
-
leaf mould compost
3. Plant shallowly
Rhododendron has shallow roots, so it should not be planted too deeply.
Do the following:
-
Dig a wide hole, about 40–50 cm deep.
-
Fill it with rhododendron compost.
-
Place the plant so that the top of the root ball sits level with the ground.
-
Water thoroughly after planting.
4. Plant at the right time
The best time to plant is:
-
spring (April–May)
-
early autumn (August–September)
This allows the roots to establish before extreme heat or cold.
Care – how to help rhododendron thrive
Watering
Rhododendron enjoys moist soil but does not like sitting in water.
Keep in mind:
-
Water extra during dry periods
-
Use rainwater if possible, as hard tap water may affect the soil
Feeding
Feed in spring, just as the plant begins to grow.
Use:
-
rhododendron fertiliser
-
organic feed suitable for acid-loving plants
Avoid feeding late in summer, as the plant may struggle to prepare for winter.
Pruning
Rhododendron rarely needs pruning, but you can remove:
-
dead branches
-
damaged parts
-
faded flowers (to encourage new buds)
This is best done directly after flowering.
Tips for success – common mistakes to avoid
-
Do not plant in lime-rich soil
-
Avoid planting too deeply
-
Do not forget watering during the first year
-
Add a layer of bark or leaves to protect the roots and retain moisture
Rhododendron likes conditions similar to the forest – cool, moist and sheltered.
Author: Emma Vogiatzi – gardener
Fact-checked by: Erik Hoekstra
Last updated: 2026-01-29