There are 43 gardens and show features in all.
Tom Massey and John Ward's Landform Consultants-built conceptual UNCHR's Border Control garden is funded with £20,000 of UNCHR money and £5,000 from the RHS to highlight the plight of refugees and has probably won most publicity ahead of the show.
Show gardens including Antonia Young's Cancer Research, Fisher Tomlin's Bowel Disease UK and Paul Hervey Brookes' Dog's Trust garden are highlights.
A butterfly dome reappears two years after Eden Project ran one at the show.
Water gardens return after an eight year gap under Viking Cruises sponsorship.
Squire's Garden Centres has an 80th anniversary garden.
There are around 100 growers exhibiting across the show.
Many will have to plan their schedule differently in 2017 as the new RHS Chatsworth show launches on 7-11 June 2017, potentially impacting on BBC Gardeners' World Live (which was 16-19 June 2016) and Gardening Scotland (2-4 June 2017).