Founder Boyd Douglas-Davies urged centres to let the Garden Re-Leaf organisers know of any events in plenty of time so they can promote the events to the consumer press.
Said: Douglas-Davies: "Last year the list of events only came together between the GCA conference and Garden Press Event and it was a mad scramble printing out what was going on the night before.
"That doesn’t give enough time to make the most of it with the consumer press."
He added: "We know who is doing the quiz and the HTA event but it’s the other interesting unique events that we don’t necessarily know about. We could make more of them if we know about them by getting our PR company to tell the tale."