Whether or not acid-loving plants like rhododendrons thrive is mainly dependent on the soil conditions. The soil must be low in lime (acid), and it must be moist without being too wet.
All the necessary nutrients, including micronutrients, must be available to the plants.
Rhododendron Mix
Garden soil does not normally fulfil the requirements of acid-loving plants, which is why we have created a special Rhododendron Mix.
It is a mixture of fine and coarse moss peat, to which organic fertilizer, NPK fertilizer and slow-release micronutrients have been added.