Visibly healthier plants in just 7 days! Miracle-Gro® Rose & Shrub Concentrated Liquid Plant Food now has a new formulation containing Humifirst® that stimulates growth and yield as well as root formation. Give your plants an extra boost with this fast acting feed that last for up to 2 weeks. Visibly healthier plants in 7 days. New formulation now containing Humifirst® which is highly rich in organic matter. Stimulates growth and yield as well as root formation. Improves plants resistance to environmental stresses. Rich in essential nutrients with extra iron for greener leaves. Fast acting feed, that lasts for up to 2 weeks, giving plants an extra boost. Less plastic and new recyclable bottle.