🌳Limelight hydrangeas 🌳 Fertilizer: don’t need much fertilizer, but you if you want you can apply a slow-release granular fertilizer in the spring and also feed them in late summer or early fall with a controlled release fertilizer to encourage next season’s flowers. (I typically do not fertilize my Limelights but this is an option if you wanted to). Pruning: In the spring, you can prune Limelight hydrangeas by cutting them back by one-third of their total height. Look for branches that are cr