The lights variety of azaleas were made in 1957 and are a cross between Japanese azaleas and Chinese azaleas. Lemon lights are lemon yellow in color and grow 4 to 5 feet tall. The striking deciduous bushes bloom in May with large, showy flowers. Once the season changes to fall, lemon light azaleas turn color. Prune lemon light azaleas to control their size and shape, and to promote good, healthy and long-lasting blooms.
Prune lemon light azaleas in the early spring, before the plant has new growth. You can cut off new blooms but the shrub will have more than enough time to recover and bloom in the season.
Remove branches that are in the shade. The lack of sunlight will cause them to die off eventually anyway. Cut them deep inside the bulk of the lemon light azalea, where they meet healthy wood.
Cut off the tallest branches that are sticking out of the plant and ruining the plant's appearance. Do this over a few seasons to avoid shock. Use the shears to trim them down within the plant. New growth will fill in the gaps.
Cut branches that are diseased, damaged or dead in order to free up nutrients to the rest of the shrub. Make the cut at a side branch that is about a third of the diameter of the unwanted branch. Cut as close to the side branch as possible to avoid a stub.
Trim off a few more long branches the following year, spreading out the pruning of lemon light azaleas over a three-year period. New growth will sprout at the base, creating a desirable rounded shape.