Old hybrid teas, own root
A recent post mentioned that hybrid teas are sometimes (or often?) not vigorous on their own roots. I've been wondering if this is true for more modern hybrid teas or for the old hybrid teas as well. Any ideas why this would be so for the old hybrid teas since they are hybrid perpetuals and tea mixes, generally, and both those were grown on their own roots?
I have some old hybrid teas that are young and am wondering how they will do own root. I'm currently growing Captain Christy, Mme Abel Chatenay, Kaiseren August Victoria, Duchess of Albany.
How have others done with these own root?