This channel is best viewed using the 'playlists' feature. Each season of every show gets it's own playlist.
Series on RU-vid tend to have lots of missing episodes (videos are blocked in different countries on a seemingly random basis), 99% of shows have full seasons on moving-gardens.com, either downloadable, or streamed via the 'DailyMotion' site (if blocked on YT and available).
All 'one offs' and miscellaneous episodes are in the non-series playlist.
RU-vid block Most Gardeners World episodes to the UK, USA and Australia - if you're in one of those countries, either get a VPN plugin for you browser, or head to MG and download them :)