What does a rhododendron leaf look like?
Rhododendrons are evergreen. This means they are always green, both in winter and in summer. Most rhododendrons have oval leaves.
Are your rhododendron’s leaves turning yellow or brown? This is usually a sign of iron or magnesium deficiency. In that case, try moving your plant to a spot where the soil has a lower pH level and give your rhododendron iron supplements and magnesium-rich fertilizer.
Tip: Adding peat to the soil will reduce the pH level