Question: What kind of fertilizer do I use on my new shrubs?

Answer: Since you’re probably going to be buying most of your new shrubs, not transplanting them, they’re probably going to come to you in containers with all of their roots intact. That means you could use a high-phosphate root stimulator when you plant them. Soon thereafter, however, you should probably switch over to a regular lawn-type food (high-nitrogen or all-nitrogen) to promote new stem and leaf growth.