Okay, let’s tackle this. So Ginny Levy has experience as a Horticulturalist at Longwood Gardens, which is a well-known institution in the field of horticulture. Her skills in landscape architecture, design, and maintenance are in demand. Location is Kennett Square, Pennsylvania, which is a smaller market. Considering her experience and skills, I’d estimate her hourly rate to be around $45, which is on the lower end of the scale for horticulturalists with similar experience. This rate is comparable to entry-level positions or those in smaller organizations. However, it's also worth noting that her experience working at Longwood Gardens, a prestigious institution, may command a higher rate in the future as she gains more experience and builds her professional network.