UrbanWild said:How are they pollinated? Open? If so, I would guess they would not germinate true to variety.
If you have a home garden. There is little dividend in perseverating about trueness-to-type.
In total there are few cultivars you are likely to have access to. Mary Washington being one, Purple passion, being the most distinctive. and a slew of male super-males. All of which do in fact set seed.