Spacing Indica Azaleas

PHOTO: G.G. Gerbing Azalea

The old tried and true Indica azalea is, for much of the South East (zone 7b, 8, and 9), especially from Birmingham to Mobile here in Alabama, a durable landscape plant that doesn’t seem to be losing much of its popularity as newly developed, heavily marketed plants find their way into the local nurseries. Indicas, with their large, showy blooms that appear in mid spring, are not only a popular natural area plant, but also finding a home as a mid sized foundation plant. Why not! They are evergreen, offer pleasant looking foliage, and if pruned properly, stay full of leaves from the ground up. Add to that the ability to grow in shade or quite sunny conditions, and you’ve got a real winner.

There are an array of Indica varieties to choose from. My experience is that some Indica azaleas, like Formosa and Pride of Mobile, are probably more suited to South Alabama than other varieties. The two Indica azaleas that I have used extensively and like the best are G.G.Gerbing (white) and George Tabor (shade of white, pink and lavender).

When laying out Indica azaleas to install, spacing is important. Decide how you want a planting to look in, say five years. A grouping of three gallon Indica Azalea, for instance, might look very satisfying with a two and a half to three foot spacing (from the center of the plant to the center of the next plant), but in five years, you will find it difficult to even walk between your plants to prune them. If a solid, hedge-like mass of azalea is what you want, and the challenge of pruning a closely spaced planting doesn’t scare you (it does me), then the decision to create a more mature looking landscape, initially, might have been worth it.



PHOTO: George Tabor Azalea

A four and a half to five foot spacing (or even more), on the other hand, can be beneficial in a number of ways. A generous spacing will allow each azalea to grow with good air circulation. This means that the likelihood of your Indicas developing insect or disease problems is lessened. Maintaining a generously spaced grouping of azaleas will be easier, as well. While Indica azaleas can grow to well over ten feet tall and wide, keeping their size to about half of that is quite doable. With five foot or more spacing, your plants can be allowed to grow to a nice five foot tall by five foot wide size without needing drastic pruning to keep them there, and each azalea will have distinct form while the grouping, as a whole, will look full.

Of course, proper spacing is important with all plants. I can’t tell you how many times I’ve been called in to prune an over planted landscape. Some of these landscapes are less than five years old and it is nearly impossible to maintain them because of the improper spacing. There are times when the best option is to cut the plants to the ground and let them come back up as a new looking, bushy plants. This technique will then have to be repeated every few years. As an old fashioned hand pruner, to resort to that breaks my heart, but, I’m sure the landscape looked outstanding for the first couple of years.