Miracle-Gro Rose Plant Food, 1.5-Pounds (Rose Fertilizer). The 1-1/2 Pound Miracle-Gro For Roses gives you “rose expert” results quickly and easily. This water-soluble rose and flower food produces up to 3 times more blooms. The Scotts Miracle-Gro family of products lets you care for all of your plants with confidence. You can trust Miracle-Gro to produce superior results throughout your flower garden–healthier plants, bigger, brighter flowers, and sturdier transplants. Miracle-Gro is number one among gardeners because it works.