The Alba Coerulea Oculata is a real beauty. a little pricey but one of a kind. Mine returned for a few years. Little Beauty was a successful force one year while my attempt to force Shogun failed. T. whittallii looks intriguing. My longest run w/ species outside was w/ T. tarda and T. linifolia. Z5b/6a. I'd probably agree w/ your assessments regarding seasonal designations, early as March, mid as April, and late for May.
