Coolings managing director Gary Carvosso said: "It was the best September we've ever had. The sunshine records were down but it was warm. It surprised me. You’d expect dry and sunny conditions to hit autumn bedding but people have been out buying."
Planner and garden centre owner Malcolm Scott said: "September was good because we had an Indian summer. Most people put on 10-15 per cent."
On a total basis, sales rose 1.3 per cent in September, against a 3.9 per cent increase in September 2015, which had been the best month of 2015, according to British Retail Consortium (BRC)/KPMG figures.
This was the fourth warmest September in the Central England temperature series going back to 1659. The mean temperature was 16.1C, 2.3C above the 1981-2010 average. The largest positive anomalies were over East Anglia and Kent, while the smallest were in western coastal areas.