I have been propagating many of my utrics from single lolons into 1.5"x1.5" cells to make plugs for trading.
Last night, I started a try of U. sp. 2 (livida-like clone from Copper; anybody know what it is?), one of G. hispidula, and one of G. lobata x violacea (giant).
It's been my belief that U. calycifida cultivars would want more room that a 1.5" plug, but I will try them next.