The event has raised £116,000 for Greenfingers over the past two years but only 30 garden centres took part in 2013. Scotsdales managing director Caroline Owen has come on board to champion Garden Re-Leaf, with the aim of getting more than 100 retailers involved.
Former Gardman marketing director Jane Lawler, who is helping Greenfingers on a voluntary basis, is devising ways for manufacturers to get involved. Founder Boyd Douglas-Davies is recruiting celebrities via his sister, who is directing EastEnders.
The annual initiative will take place on 14 March 2014. Jackson called on the whole industry to take part: "If you missed out on Garden Re-Leaf before, now is the time to do your bit. It's an invaluable chance for everyone to pull together and support a fantastic charity as well as nurturing business at the start of the gardening year."
The HTA, Garden Centre Association and Garden Industry Manufacturers Association are backers, with the RHS and two major multiples possibly being involved.
The Garden Re-Leaf celebrity gardening quiz will be voiced by Alistair McGowan. To run the quiz, order an organiser's pack (£100) by calling 0118 930 8918 or email firstname.lastname@example.org.
Shopping channel QVC is planning three fundraising shows over Garden Re-Leaf weekend. Garden centre customers will be encouraged to fill wellington boots with £1 coins at the point of sale.
Suppliers including Scotts Miracle-Gro, Mr Fothergill's, William Sinclair, Westland Horticulture, Kelkay, Solus, Richard Jackson's Flower Power, Pleydell Smithyman, Bon Bon's, Neudorff, Gardman and Briers have donated to the Garden Re-Leaf marketing "fighting fund".