While taking care of some family issues in Florida ,I took some time out to paint. It's challenging designing paintings when you are surrounded by many similar types of vegetation.
To alleviate the "Green" problem, I have a simple three plan objective in place.
First, organize your masses in light and shade pattern. Light and Shade is beginning of understanding of light key.
Second is to make your color notes within the masses separate and distinct from one another. This is the fun part of the painting where you can actually go over the top with color. Make bold and beautiful pure color notes as possible. The last objective is to resist green in your masses only use when you must use the green.
Trying to express light key and organizing your masses is essential to plein air painting. By the time you adjust the painting a few times; you begin to see that vegetation and foliage isn't as green as you might have thought.