Use Anywhere - In Ground And In Containers Miracle-Gro Shake ‘n Feed All Purpose Plant Food contains natural ingredients to feed microbes in the soil. Microbes break down natural ingredients into nutrients that support root strength and development which increases water efficiency. It contains vital micronutrients to grow stronger, vibrant and more productive plants, versus unfed plants. For a beautiful garden all season long, reapply every 3 months and water regularly.