His view was echoed by gardening broadcaster Pippa Greenwood, who is on a Stewarts road show tour of garden centres. The two agreed that better labelling and point of sale were needed to keep the trend going.
Gow said the term was barely known by the industry five years ago but had become a "phenomenal" trend. Meanwhile, Greenwood said garden centres should give clear advice to consumers so as not to drop the GYO "golden egg".
She complained that some garden products seemed to be made by manufacturers looking for a "quick buck". She was "horrified" by one label that suggested earthing up potatoes with a trowel because the work would put off new growers.
The HTA Garden Retail Monitor showed GYO plateaued in 2011 at 43 per cent.