All Party Gardening and Horticulture Group secretary Brian Donohoe, the Central Ayrshire MP, said that - with Beechgrove Garden now on the BBC UK-wide and Britain in Bloom winners including the likes of Aberdeen - Scotland was a "beacon" for gardening, and did not need independence to help it.
"The horticulture industry requires a strong UK government to be able to stand up to Europe. I don't believe a separate Scotland would be capable of that. It would have to roll over to everything coming out of Europe."
Perennial garden designer Amber Goudy said: "Independence would have a negative impact because the economy would struggle. The garden design industry only works when people have money to spend on their gardens, and the economy would take a hit, the same as in a recession."
And Rumbling Bridge owner Graeme Paton said: "I'm for independence in a political sense but in a horticulture sense the Scottish government has never paid any great attention to horticulture. They've done nothing to reverse the decline in Scotland."
B&Q owner Kingfisher chief executive Sir Ian Cheshire said independence would mean a "pause" in Scottish investment by Kingfisher.