We visited Abbotsbury in Dorset last week, well worth the trip (but look for 2 for 1 offers online first). Massive place on 20 acres, looking immaculate and growing some rather rare and tender plants due to its very mild location. Check out our blog for pictures (Abbotsbury Subtropical Gardens ~ Alternative Eden)
As you probably remember it is just down the road for me and I have been three times this year, a great place, not always full of colour but always something interesting to see.