The text is more difficult to read than most sites. It doesn't need to be black and white, but more contrast might help.

I like the pictures, especially on the front page.

People have already commented on the location being unclear at first glance. I'd add that mentioning that some of your services (like classes, planning, etc.) might be helpful to people across a wide section of North America. That way people don't see Oklahoma and think they should stop paying attention because they are in Iowa.

I don't expect you'd be an expert on native plants in both Flordia, Nevada and Montana, so knowing what areas you're comfortable with would be helpful. It might be helpful to day you cover something like the midwestern USA, or between the Rockies and the Atlantic, or whatever the case may be.

Overall, I like the concept and might even be able to send some people your way if you can cover East Central Illinois and have rates my friends can afford.