Garden spending peaked at £5,890 in 2003.
A typical household spent £1,442 on home and garden, with overall home and garden spending at £38.7 billion.
Aggregate spending rose by 3.3 per cent in 2010 and is forecast to rise by 1.2 per cent in 2011.
The most important factor for determining the choice of retailer for garden products is cheapest prices (53 per cent), Mintel said.
See more in Horticulture Week 16 September.