Whimsical Colors!
The best part about the botanical gardens are their conervatory or green houses. Inside you will find plants that will sit still for you (won't be blowing in the wind), which is great for macro shots.
Here are some pictures from my recent trip to the New York Botanical Garden. It features a HUGE conservatory that's broken down into tropical, subtropical, and desert sections, with plenty of opportunity for photography.
Well here are some pictures I took from there. Some of them were tweaked slightly in photoshop to give them a slight emphasis. Enjoy!