Silver Sails Tree Peony Silver yellow flowers, heavily blooming. Grown without use of synthetic herbicides, pesticides, and fungicides. Cultivar: lutea hybrid Bloom time: late-season (compared to other tree peonies) Growth habit at maturity (10 years old): 3.5′ tall and 3′ wide, upright and slightly spreading habit. Hybridiser: Saunders, 1940 Hardiness zone: 4-9 Plant size: Will likely bloom its second spring in the ground. Available by mail in fall 2021. Or pick up in Halifax.