two trays of canada wild plum

two trays of canada wild plum, the first one (and the one full of trees) started early may, and the second one started early april, spotty germination. letting plum seeds have a good long cold stratification period through until may is a better result. the april tray may all germinate eventually, but if they need more cold time in cold strat the seeds may stay dormant and get saved for next year.