rosebay rhododendron

Rhododendrons require consistent watering for healthy growth and flowering. Water the rosebay rhododendron (Rhododendron maximum) with 1-2 inches of water weekly during the growing season (spring and summer). Water deeply, applying the water slowly at the base of the plants and avoiding overhead watering. During periods of heat and drought, increase watering if needed. Increase watering to 3-4 inches per week if the soil is sandy and dry. During the fall and winter period, reduce watering to every other week when the plant is not actively growing. Be sure not to over-water the plant as it can cause root rot.

Rosebay Rhododendron (Rhododendron maximum) appreciates full sun, which it needs for a minimum of 6 hours daily, preferably during the morning hours. Without it, the plant will not flower. Too much direct exposure to sunlight during the hottest part of the day can harm the flowers, however, so providing some shade in the afternoon is beneficial. Rosebay rhododendron will generally thrive in any light condition from full sun to partial shade, but it is best for the plant to have full sun for the greatest number of hours without being scorched by the intensity of the afternoon sun rays.

Rosebay rhododendrons (Rhododendron maximum) should be pruned when new growth begins in spring. Generally, pruning should begin in late March/early April and should be light (no more than 25%). The purpose of pruning is to shape and control the size of the shrub. Remove dead and poorly placed branches, and reshape the shrub as desired. Heavier pruning can be done to reduce size if necessary. Large, old rhododendrons can be hard-pruned every 2 to 3 years to remove a third of the oldest branches, thinning it and rejuvenating the plant. However, take care not to remove too much of the older wood, as this can cause a die-back of the whole shrub.