How much sun is full sun?

Full sun is defined as having direct exposure to the sunlight for at least six hours of the day.  

How much shade is full shade?

Full shade is defined as having less than four hours of any sun exposure.  

What is a tender perennial?

A tender perennial is a plant that has a perennial life cycle in a climate warmer than the one you are gardening in. 

In what climate zone is York, PA located?

Here in the York area, we are in climate zone 6b.