Nearly all of the sucker leaves that I harvested in 2011--some primed, some stalk harvested--are still hanging. The suckers seemed to be particularly difficult to color-cure. All of it, though, is slowly losing its green tinge. I suspect that the underlying problem with its color-cure is how late they were harvested. By the time my suckers were brought in (some not fully mature), it was late in the season. The weather was no longer conducive to timely color-curing.
I believe it was Garner (Garner, WW: PRINCIPLES AND PRACTICAL METHODS OF CURING TOBACCO. USDA. US Govt Printing Office, Washington, 1909.
[download from archive.org] - 3.6MB) who suggested that unfavorable weather during a growing season was less to blame for poor leaf curing than the delay it caused in maturation, and thus the lateness of the time during which the leaf began its color cure.
I suspect that suckers arising from last year's stumps would be more likely to end up in the shed at a more favorable time, and color-cure better.
Bob