The BBC series celebrates its 50th anniversary in 2017 and has been looking to the future this year by trialling new producer Paolo Proto, formerly of The Great British Bake Off. New presenters used in the current series include Frost, Frances Tophill, Danny Clarke, Nick Macer and Nick Bailey.
Frost learnt his trade under former Gardeners' World presenter (from 1979-96) Geoff Hamilton, who died in August 1996. Gardeners' World presenter Carol Klein will open a new winter border at Hamilton's Barnsdale Gardens in Rutland on 9 August to commemorate the anniversary of Geoff Hamilton's death.
Nick Hamilton said: "Adam has been to the garden to do some filming to do with my dad and I was interviewed. He knows the garden inside out and knows our philosophy. Adam becoming main presenter is something I've heard from a couple of people, but I've not heard direct. It's a possibility but if it happens, it happens. I'm very good friends with Adam and get on very well with him so I've no problem with that.
"I have my views on the way things go in horticulture, as everyone does, including on Gardeners' World, and I think he's a very good presenter.
If someone is trying to take off your dad and he's not doing a particularly good job it's a problem, but Adam wouldn't do that - he'd be himself.
"But things move on very quickly. After Dad died there were new people running Gardeners' World very quickly. If you change the series producer it can have a massive impact on the way the programme goes."
On the winter border, Nick Hamilton said: "We've had a magnificent response. It's made it a very personal thing, which is what I wanted. Carol Klein has dug up a plant and will plant it in the border as the last plant. The border showcases what's happened in the garden over the past 20 years and how much has changed and the legacy I was left and everything my father would have wanted."
The Barnsdale winter border will contain around 400 plant varieties, with many donated by friends and former colleagues. Gardener Matthew Narciso is planting the border to Nick Hamilton's design on a placement funded by a bursary from Geoff Hamilton's New Gardeners' Foundation. Howard Nurseries, Hillier and Goscote Nurseries are among those donating plants, as is Frost.
The BBC also has a plan for a 50th anniversary Gardeners' World garden to be accessible to the public and students and probably located within an existing garden in central England. It will open up Gardeners' World to independent producers from next year - it is currently produced in-house. The BBC said it is planning no changes to Gardeners' World. Frost was not contactable.