I have a lilac bush and a hibiscus planted in the same area ... what to feed?
What to Feed Lilac Bush
Certified GKH Gardening Expert
Lilacs do best when not fertilized. That said, you can use a general-purpose fertilizer (low in nitrogen) in the spring to help give lilacs a little boost. You can also add some compost in and around the soil. If you are having issues with blooming, use a high phosphorus fertilizer or add bone meal to the soil. This article will help with your hibiscus: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-fertilizing.htm