The industry roadshow, which aims to demonstrate how to make a neglected garden into an attractive one, has been to Cardiff, Antrim, Wales, Alexandra Palace, Edinburgh, National Plant Show, and Solex this year, as well as seven garden centres.
The collection of gardens will be on display at Stratford upon Avon Home & Garden Show on 17-19 July and BBC Children in Need Car Fest at Oulton Park, Cheshire from 31st July - 2nd August.
Arnold thanked the industry for donating products and Westland for transport. He said in 2016 the roadshow would be at fewer, but different venues and could be "self-contained on a double decker bus".
He said he wanted to involve garden centres more so traffic can be driven to them.