The NFU, HTA and British Protected Ornamentals Association (BPOA) have met this week to agree to move the NFU's code of good trading practice for flowers and plants forward.
The code launched in October 2013 at the BPOA's autumn event but the HTA has yet to sign up to it. The code sets out guidelines for growers when trying to negoiate fair contracts with retailers and followed a series of rejected orders in spring 2013 which left growers throwing away thousands of plants.
Since then Homebase has toughened up on rebates, which the BPOA suggested went against the code. The HTA however did not criticise Homebase over its actions.
BPOA chairman Ian Riggs, NFU horticultural adviser Dr Chris Hartfield and HTA horticulture head Raoul Curtis-Machin said in a statement: "It was a positive meeting and it was agreed that the three organisations will continue to work behind the scenes on this issue."
They said they will talk to grower and retailer groups and meet again in the autumn.