Seeds and bulbs led the market at 26 per cent up on 2009, thanks to spring starting late, suggested GCA chief Gillie Westwood.
The Home Counties and North East are faring worst, but Westwood said garden centres were matching the "stonking" 2009.
SECTION MAY 2010 YEAR TO DATE
Seeds and bulbs Up 26 per cent 5.5 per cent
Outdoor plants Up 2.5 per cent Down 5 per cent
Sundries Up 2 per cent Down 3 per cent
Furniture and barbecues Up 7.7 per cent Up 8 per cent
Gifts Up 7 per cent Up 6.7 per cent
Catering Up 4.8 per cent Up 1.5 per cent
Overall Up 3.5 per cent Level with 2009