I have Holly shrubs that are dying from the center out. I had someone tell me they have bugs and also need to be fertized. What would you recommend me using as an insecticide spray and fertilizer?
Certified GKH Gardening Expert
This article has information about common problems with holly: https://www.gardeningknowhow.com/ornamental/shrubs/holly/diseases-of-holly-bushes-pests-and-diseases-damaging-holly-bushes.htm
As for pesticide, I would recommend neem oil. It works on most insect pests and is safe to use. As a bonus, it's also an effective fungicide, which should help with any fungal issues caused as a result of the insects. Here is more information: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
In regards to fertilizing holly, fertilize once a year (preferably in spring) with a balanced fertilizer. There is a fertilizer called Holly-Tone that is specifically made for holly and is very good.