What is the difference between hydrangeas and rhododendrons?

Both rhododendrons and hydrangeas are sensitive to soil pH, and both grow best in acidic soils with a pH level between 5 and 5.5. Hydrangeas, however, are less sensitive and will tolerate soils with a higher pH. The flowers of French hydrangea will vary depending on the pH of the soil in which the shrub is growing.Click to see full answer. Similarly, how do you tell the difference between azaleas and rhododendrons?Azaleas have appressed hairs which is hair parallel to the surface of the leaf. Instead of having hair, most Rhododendrons are often scaly or have dots underneath the leaves. Azaleas also have tubular or funnel shaped flowers. Rhodi flowers are more bell shaped.Furthermore, which is easier to grow azaleas and rhododendrons? Most members of the heath family require acidic soil. When you have naturally acidic soil in your yard, it is a lot easier simply to grow acid-loving plants rather than trying to change the pH level. On average, rhododendrons are larger shrubs than azalea plants, and they have larger leaves. Subsequently, question is, what does a hydrangea look like? Hydrangeas are often prized as much for their dried flowers as for their live ones, particularly mopheads (Hydrangea macrophylla), the species with large, ball-like clusters of pink, blue, purple, white or red flowers. If uncut, the flower heads dry, become bronze-brown and remain intact on the shrub.Where do rhododendrons grow best?Unlike many blooming plants, rhododendron does not like full morning sun in winter and does best when planted in dappled shade on the north side of a building. Growing rhododendrons are happiest in a location protected from the wind and not under eves of a building.