The poll of 2,000 people by the maker of Roundup weedkiller gave women the edge on choosing, arranging and looking after flowers and ornaments.
Men however were seen as best at manual tasks such as grass cutting, tending to vegetables, patios and decking, fixing and painting fences and building sheds.
Gary Philpotts, representative for Roundup, said: "Traditionally, the garden has been seen as the man’s responsibility, but it seems many now think women are best.’’
Three quarters of Brits enjoy pottering around outside, with 17 per cent saying they love every job involved in keeping the garden in good condition.
Choosing shrubs for the garden was found to be the most enjoyable garden task, followed by arranging the plants in the garden and planting them.
The average Brit meanwhile spends three days, 12 hours and 43 minutes each year keeping the garden at its best.
An average of four hours and eight minutes is taken up each month from October to February, but summer sees gardeners spend around nine hours a month in the garden.
Philpotts said: "Eighty four per cent of British adults have access to a garden or somewhere to grow outdoor plants.
"Since the bleak economic gloom began people are spending more on gardens as a result of going out less frequently.
"It’s only natural that men and women adopt different roles in the garden, similarly to housework and DIY.
"Our sales have shown that more and more women are purchasing a weed treatment in order to make life a litter easier in the garden."
Roundup, based on glyphosate, is made by Monsanto Technology.