Wonder Organics Super Bloom has been specially formulated to support plant health, strengthening roses and flowers from the inside out. With a 4 to 6 weeks slow release feed, combined with added sulphur, as well as zinc complex; this perfect blend ensures your best ever roses and flowers. Zinc is important in the production of plant growth hormone auxin. Improving transport of water and nutrients around plants. Promoting root and shoot growth for stronger, healthier plants. Encouraging photosynthesis for plant energy production.