The Johnsons of Whixley director said landscapers are booming but costs - particularly fuel - mean plant prices have had to rise.
He said prices had barely risen for a decade, but retailers and small contractors have now realised plant price rises are acceptable.
"Landscape and garden centre customers know how our costs have risen. But if we'd put prices up a little bit every year for 10 years we wouldn't have had to do this."
He added: "The economy is on its uppers according to the media but at Johnsons we're doing well with sales and I think that's indicative of the whole industry."