25+ Royal Empress Tree Seeds/ Flower Seeds Fast Growing Grows Anywhere/Perennial Easy to grow, fast growing. Will grow 7-15 feet the first year. Fresh seeds. Can be started indoors in winter to be transplanted outdoors in spring. Or can be sown directly into the ground in spring, summer or fall. Perennial zones 3-11. 50 feet tall. Full sun or partial shade. Delightful fragrance. Disease resistant. Instructions included.