Fertilizing Biweekly is one of the most important things you can do to help ensure a successful gardening season! And our sprayer makes it easier than ever! Add 3 scoops of any of our fertilizers to the sprayer. Add 6 scoops liquid seaweed and fill with water to top line of sprayer. Add 1 scoop wetting agent. Attach hose and spray till empty. You've fertilized! Watering Can Instructions