As a sector the gardening press targets the most English of interests. There are a number of broader reach titles notably Gardeners World with a monthly circulation of over 200,000 and the up-market, but high circulation, The Garden from RHS with a monthly circulation over 350,000. Garden News and Amateur Gardening are both weekly with healthy circulations of 27,729 and 36,462 respectively.
Coffee table books, like Gardens Illustrated and English Garden, have very high AB profiles. Then there are more practical publications aiming at enthusiasts like Garden Answers and the thriving grow your own market like Grow It! and Kitchen Garden. There are also highly specialist tiles like Rose or even Bonsai Focus.
Alternatively reach the “interesteds” with the more mass market targeting of the national press supplements and gardening sections that give high penetration on a weekly basis.