Harrogate Flower Shows have also been voted the most popular gardening event of the year by 47,000 viewers of The Horticultural Channel. Second place went to The Edible Garden Show and third to RHS Hampton Court Palace Flower Show.
Show director Martin Fish said: "The results of the Which? survey and the Horticultural Channel Awards are fantastic news as well as a tremendous affirmation of the hard work and dedication of everyone involved with Harrogate Flower Shows."
He added: "The 2013 Spring show will feature twice the number of show gardens, as a direct result of the comments we received from our visitors last year."
Which? Gardening Best gardening show
Harrogate Spring Flower Show 86%
RHS Hampton Court Palace Flower Show 82%
Harrogate Autumn Flower Show 81%
Malvern Spring Gardening Show 80%
RHS Flower Show Tatton Park 79%
Shrewsbury Flower Show 78%
RHS Wisley Flower Show 76%
RHS Chelsea Flower Show 75%
Gardening Scotland 74%
Malvern Autumn Show 71%