There are several Miracle Gro fertilizer products that are suited for strawberries. This includes the Water Soluble Tomato Plant Food available at Walmart that is a high-potassium feed ideal for plants in containers. Another very suitable product is the Shake 'N Feed Tomato, Fruit & Vegetable Plant Food available at Amazon – a multi-purpose fertilizer with an NPK of 10-5-15 that can provide strawberry plants with all the nutrients they need for healthy growth.