Dozen Hybrid Willow Tree Cuttings - Fast Growing Trees You get 12 easy to grow Austree Hybrid Willow Trees that are ready to plant. These Austree Willow Trees are bred specifically to be one of the fastest growing trees in the world and are very easy to grow and maintain. If you give them the right conditions they can grow up to 15 feet in the first year. Use to create a quick privacy hedge row or fence, natural wind break, or add cooling shade to your outdoor space or home. . These Willows will mature at around 50 feet tall and up to 35 feet wide, and live 50+ years. You will be amazed by these trees ability to grow. ****During hot summer months over 90 degree or if the below freezing these may be shipped dormant to protect from the starts being damaged.