This should be an easy suburban park & grab if you want it to be? Otherwise take a bit of time and see whats on offer at this lovely venue. Take a stroll through the very well kept gardens, or grab a bite & cuppa, its all available. Take note of the access times for retrieval: Mondays - closed, Tuesday - Sunday 08h30 - 17h00. Please take care as not to stand in or in any way damage the flowerbeds when searching, no need to when locating this one!
Anyway that said, the cache you are looking for is a home made replica of something you would find in most gardens, bring a pen as it only contains a log sheet. Be aware of potential muggles when retrieving and please replace the container as found.