The Cache is a clear Tupperware container, about 6" by 4" by 2". Original contents: seashell, spongebob toy, fifty cents (two quarters), smiley top, scorpion paperweight, small oneway sign, log AND pencil. The title might throw you off a little, but it does mean what it says. Look for a cave; what kind of cave, well, I'll leave that for you to find out...
There are plenty of trees in the garden, and some of them are near the cache. If they start to mess up your GPS, just walk around in circles where there are no trees overhead and it should be back to normal. If there are any problems, I will happily answer your querry. If you need an extra hint, and if you do than you must be blinder than a bat (joking), you can contact me here.
The only problems you may experience are that these gardens are a very popular place, and many people walk through them everyday. All week long people tend to them, so try your hardest not to give away anything (or look absurd, tromping around in bushes). Another obvious clue that I want to make certain everyone knows: The cache is not in any of the gardens! If you're GPS tells you that the cache is behind any of the fences that surround the vegetation that grows there, than it is wrong. You do not need to go past the fences, and I do not want any of the beautiful plants to be harmed or destroyed because of geocaching. It is inside the garden, but not inside the garden.
One last thing, I've noticed in my recent trips to the garden and my cache that there is a pretty clear trail strait to the cache. I would greatly appreciate it if you would do your best to cover your tracks, just so as not to make the obvious any more obvious. Thank you very much, and now I will leave you to go searching!