Meanwhile new plant and new product entries for the Four Oaks Trade Show Awards, hosted by Horticulture Week on the first day of the show, have reached 89 so far, with more set to come in.
The exhibition covers an area of 17,000m² under glass with additional outdoor areas.
Big displays of plant material form the heart of the show, with associated supplies and services from production to point-of-sale. More than 30 per cent of participating companies will be from overseas.
This year's return to better gardening weather has meant that confidence is up among the growers exhibiting at the show.
"Fortunately, this has been a much better trading season," said Earley Ornamentals product manager Keith Gittens. "We've had plenty of sun but also plenty of rain - it's a more favourable gardening season because people are getting out there and buying plants."
Many growers are optimistic about 2015, such as Farplants group business development manager Mike O'Conner, who predicted that the coming year will be a good one. "The weather has been better than previous years, the season is steady and forward orders are very strong," he said.
Ball Colegrave marketing manager Stuart Lowen added: "The weather has been great. We had a tremendous May and June, and the season is averaging out well".
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Four Oaks event director Pat Coutts said: "The weather is the most crucial thing, more than any other economic factor."
She added that there are a lot of new exhibitors from Europe at the show this year, such as four new Italian growers taking the total to 17 from that country.
"The Europeans are making hay while the sun shines in the UK, while the exchange rate is in their favour," said Coutts.
Commenting on Four Oaks, HTA operations manager Martin Simmonds said: "They do a fantastic job and constantly sell out pretty much every year for the last few years and long may that continue because it’s a good show."