What a lovely way to spend a Saturday afternoon! ...Although I'd probably recommend going on cooler day. It is a lot of walking and sunshine...so really, regardless of the heat, you should slather on the sunscreen and stay hydrated!
It takes about an hour to 1.5 hours (going at a brisk pace) to cover all of the gardens on display. Some gardens are nicer than others, and there are a few that are still under construction. My favorites were the Sunken Garden, the Rose Garden, and the Thai Temple Garden. I thought that all of these displays are well thought-out and perfectly executed!
Looovve!! I'll be back in the fall when the leaves change colors. (: