cymbidium back bulbs, no luck, all died.

[Fairorchids]

This spring I saved BBs from 6 of my better Cymbidiums, with most having very few live roots.
The larger ones went into my normal terrestrial mix in 4" or 6" pots, while the smaller ones went into spaghnum/bark mix (4:1) in 3" pots. They sit on the bench next to some compots with Cymbidium plugs, so I water them twice a week.
So far, 5 of the 6 have started new growths.