Garden ReLeaf raised £61,379 on its 8 March fundraising day.
The event, initiated by Boyd Douglas Davies in 2012, is designed to kick start the garden centre season, raise cash for Greenfingers and be a fun day in centres.
Actor Robert Carlyle backed the day this year on video at the GIMA awards, where a total of £116,000 raised in two years was unveiled. The 2014 event will be on 14 March 2014.
Douglas Davies said a 1914-2014 fundraiser for Gardening Leave would involve garden centres selling Suttons poppy seeds to commemorate the start of World War One. GIMA, HTA and Dobbies have backed the plan.
GIMA awards presenter Gyles Brandreth said: "The garden industry has a lot of core values but is as modern as tomorrow.
GIMA president Vicky Nuttall said of this year's weather: "Good things go to those that wait." She said the industry took advantage of there being no Olympics, world cup football or royal wedding
and beat a late season and austerity to have a good year.