Q: after 10 years today I cut my pachysandra completely level with soil, and i'm assuming it will recover nicely. When and how often should I fertilize?
When you see it leaf out and actively growing, give it some Plant Tone by Espoma at the recommended rate. I'd also dust the area with an inch or so of good quality compost. Once a year will be fine. Do keep the area watered so the soil stays moist. Best And Happy Yardening, Nancy