Squire's Garden Centres has said sales over the May bank holiday Monday which had mixed weather were "slightly down on last year". But Monday to Sunday sales were three per cent up, and furniture had done well.
Ayletts said the bank holiday weekend overall was up six per cent. Director Adam Wigglesworth said good gardening weather including some welcome rain had brought in customers.
He said garden furniture had been "very strong"", adding that customers were keen to make the most of any good weather by buying furniture sets early in the season.
Alton Garden Cetre director Andy Bunker said the bank holiday was "good overall".
He added: "For us we do not want beach weather being close to the sea front. When the weather is like it was 90 per cent of people coming in are coming in to buy rather than just coming in to look round.
"Overall the garden centre was plus 12 per cent over the three days of the bank holiday, although plants were only up two-three per cent. For once the weather helped us, although bright, very windy and rain on and off."
David Cameron was at Squire's Twickenham on 4 May on the campaign trail. He has also visited a Wyevale Garden Centre ahead of the election on 7 May, as had chancellor George Osborne.