@frankrichards16 I am just now starting to get seed catalogs (including plants, of course.) Now, the trouble starts with having to make lists, from where I want to obtain all the ones I would like to order. Meanwhile, there are already plants, roots, tubers, rhizomes & rooted cuttings that may take priority, over Marigold seeds ( from Burpee ) for about $6 a pkt.

which appear more like a Chrysanthemum...
I am uncertain how old a mum variety must be, for consideration as an 'heirloom' as by now, some of the rooted cuttings I may want, possibly qualify. That is, depeneding on the age of the cultivar I select.
Do you by any chance know, the age requirement, to qualify as "heirloom" for mums? & what about what used to be 'Shasta Daisy', is it in now Chrysanthemum, or still Leucanthemum?
I can't always recall things, as easily as I used to!
Thanks, Shawn