The Spun Gold-produced show will be one series of six one-hour programmes rather than two series of 30 minutes as in last year's launch season.
Love Your Garden is seeking products from suppliers and growers as well as "inspirational ideas that motivate gardeners".
Garden Industry Manufacturers Association director Neil Gow said he will again work with producer Spun Gold to coordinate suppliers.
Domoney launched the inaugural RHS Young Gardener of the Year at RHS Show Cardiff last week. See www.rhs.org.uk/schoolgardening.