Ideas for the concept map

Hi all,
I've been thinking about the concept map that is due Sunday. Here are a few ideas of things we might want to touch on as we develop our project. Hopefully this brainstorming format doesn't bother anyone...!

Types of gardens - water gardens, indoor gardens, fruit and vegetable gardens
Importance of gardening - environmental benefits, self sustaining, erosion control, eating health/organic
The role of weather/climate - different zones where plants grow, how climate affects the landscape around us
Logistics - what plants need to grow (water, sunlight, fertilizer)
Anatomy of a plant
How plants reproduce
Importance of gardens here, vs around the world

These are just a few of the things that come to mind when I think about teaching fourth or fifth grade students about gardening. I like the idea of being able to tie in weather, science and social studies.

What am I missing? What else do you guys think?