Growing Rhododendrons

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Although gardeners have been cultivating Rhododendrons since the 18th century, they didn’t become more widely known until the 1900’s. At present, there are now more than 900 species and 8,000 varieties of Rhododendron worldwide. Rhododendrons are a related variety of the Azaleas that grow in a great variety of shapes and sizes.

The growth of rhododendrons ultimately depends on the climate of the country where it is planted. They perform best when the exposed to direct sunlightfor less than four hours a day.

Rhododendrons grow much better under more sheltered conditions, away from damaging cold winds. They require an acid soil of pH level of 5 or less, although it is still possible to grow rhododendrons on a slightly higher pH level of soil. The soil that grows rhododendrons should be treated with acidifier to prevent yellowing leaves or poor growth.

It is suggested that to improve the soil, you should mix in organic matter before planting. Bear in mind to avoid using mushroom compost as it may contain lime with a high pH level, which is not suitable for planting rhododendrons.

Rhododendrons’ roots tend to be quite shallow, so they should be planted at the same depth as they were grown in the pot. Forking around the plant to rid off the weeds is not advisable so as to not disrupt the roots. Instead, have ground-cover plants such as hostas and Geranium macrorrhizum that will surround the plant with a thick carpeting of leaves and flowers.

Once the rhododendrons are planted, there is less need for feeding or pruning. Given that it is planted under an ideal condition, rhododendrons do not require much attention or care. However, deadheading after flowering is recommended as it directs the energy of the flowering plant to the formation of new flower buds. Subsequently, it also improves the health of the plant.

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