Hi @Shaz51.
@Former-MemberGarden club visited St Erth last month. I think I like Lambley's gardens better. I liked being able to see the evidence of Tommy Garnett's original layout and plant selection at St Erth, but over the years a lot of that has been relaid or replanted by Diggers. Fair enough, a new owner has the perogative of remaking a garden, but Tommy Garnett had it as a plantsman's garden; for Diggers it's a display garden to help sell their plant range. Still a well laid out garden, but not so "homey".
The Lambley garden are display gardens too, but somehow they feel more inviting. I'm not sure which bit I like best out of the Kitchen Garden and the Dry Garden....
Another interesting Central Vic one we visited is the more recent creation of Greg Lyons, Wild Honey garden. It's a private garden, not often open to the public, so it was a bit of a treat getting a private showing of it. It's a fun garden to explore.
http://www.abc.net.au/gardening/factsheets/a-lush-oasis/9441012