He said figures corresponded with GCA and HTA statistics of level, or slightly below, the key first six months. The representative added that grow-your-own and plants had done well and garden furniture had been a "nightmare".
Kingfisher has said gardening was 40 per cent down in April-May and Homebase is quoted as saying the area was 25 per cent down.
But specialist garden centres are holding up, said the Wyevale representative.
Meanwhile, Wyevale has opened the first in a new generation of "eco-concessions" at its Syon Park branch in London. A second ECO-St is due to open at Wyevale in World's End, Wendover, later this month.
ECO-St helps customers to calculate their carbon footprint and advises on how to use less energy.