Okay, let’s break it down. Jeffrey Borger is an instructor at Penn State University, which is a reputable academic institution. His skills in teaching, higher education, and horticulture are valuable, but not extremely rare. Considering his role as an instructor, I'd estimate his hourly rate to be on the lower side of the spectrum. Let’s look at some benchmarks for instructors in the US. According to data from the Bureau of Labor Statistics, instructors can earn between $25 and $40 per hour. Since Jeffrey has a Master’s degree and teaching experience, I’d place him in the middle of this range. However, given his specific skills and location, I’d estimate his rate to be around $75 per hour.