Last year, the show sold out two days before it opened to RHS members.
RHS shows director Stephen Bennett today condemned the touting of Chelsea tickets. He warned anyone buying from touts that they would be denied entry if their tickets turned out to be fakes. Mr Bennett said: "Profiteering from Chelsea tickets makes us extremely uncomfortable but it's impossible to stop. We would urge internet users to exercise extreme caution and make sure that any tickets they've bought are not fraudulent.
"If tickets aren't genuine, the holders will not be admitted to Chelsea even if they have paid ridiculously high prices. We are, however, happy for people who bought tickets and cannot make it to the show to give them to friends and family or sell at face value."