Grow It! editor Ben Vanheems said the 15,000-circulation Kelsey Media-published magazine, launched in 2007, will close after its December issue because of a falling circulation and "substantial financial losses".
He added: "Lots of people have the skills now and are quietly getting on with grow your own so maybe they don't need fresh, new ideas to maintain their interest."
But Grow Your Own editor Lucy Halsall responded: "I don't think grow your own is disappearing. There are so many community and city garden schemes popping up internationally - it's not just a UK market. I'm fully confident that it's now intrinsic to people's lives."
Vanheems added that consumer magazine sales are shrinking and "we have been the first to crack" in the grow your own market.
"It's a tough time for all of us. We started last into the grow your own magazine market so we were always on the back foot."