Amaranthus Green Thumb Amaranthus Hypochondriacus is a hardy annual with upright growth habit. Commonly called Prince-of-Wales Feather and Prince's Feather, this Amaranthus can be easily started from seeds. Amaranthus Green Thumb features dark-green foliage with oval leaves and produces unique, upright, apple-green flower spikes. Amaranthus grows fast starting to bloom in late spring and bloloming nonstop all summer long.
