Author Ken Cox said the book has started a trend where garden lovers try and 'bag' all the gardens, featured in its 500 pages. He added: "I think it's a really good idea that you should tick off gardens like Monros."
The book has 120 new entries since first publication in 2009 but at least three have closed.
Speaking at the Gardening Scotland launch, plant hunter Cox says sad losses are Jura House Walled Garden, closed after a hedge fund billionaire bought it, Cherrybank Gardens in Perth, closed after an unsuccessful attempt to make the heather collection part of Scottish national garden The Calyx, and remote Kerracher, accessible only by boat but closed when opening it became too much work for the owners.
They recommended new entries Boath House, Jupiter Art Land, Shambellie Walled Garden, Rocheid, Croftcat Lodge and Glassmount House.