Get visibly healthier plants in just 7 days! Miracle-Gro® Azalea, Camellia & Rhododendron Concentrated Liquid Plant Food now has a formulation containing Humifirst® which is highly rich in organic matter. Feeds for up to 2 weeks.Specially formulated plant food for healthy growth of acid-loving or lime-hating plants.Stimulates growth and flowering as well as root formation, improves plants’ resistance to environmental stresses.Prevents yellowing leaves caused by lack of iron* Versus unfed plants