The upturn in the weather has led to a spike in ticket sales for Gardening Scotland, managers have said.
Show organiser Martin Dare said: "When the weather picked up earlier this week we sold 800 tickets in just a matter of days when we would have expected to sell just a quarter of that number.
"There is a huge pent-up demand amongst gardeners to get out and start gardening and we are seeing that reflected in our numbers."
Around 40,000 visitors and 400 exhibitors are set to take part in Gardening Scotland 2013 from 31 May until 2 June at The Royal Highland Centre, Edinburgh
Gardening Scotland director George Anderson said that the recent warm spell after months of cold had led to rare plant combinations.
Anderson added: "For the first time that most people will be able to remember, those plants that depend on soil warmth are going to start appearing at the same time as those that flower according to day length and the result is set to be some of the strangest flowering combinations that most of us will ever have seen."
The Beechgrove Garden presenter said that to have snowdrops still in flower in mid April when leaves had only just started appearing on the hawthorn was almost unheard of."But it will only take a few days of good weather to get everything flourishing all at once and then spring will be spectacular."