HW understands Wyevale is to buy Trelawney's Barnstaple centre, while Blue Diamond is to take on Probus, as reported in HW last week, and also Wadebridge.
Probus is yet to be built, while the other two David Danning/David Symons-owned centres are well established.
Wyevale is also to take on a Welsh garden centre as it steps up its expansion drive.
All the deals are yet to be completed.
Danning told HW he is going to build Probus starting imminently. The centre has been in planning for a decade. Blue Diamond will then lease it.