Osmocote PotShots Pre-Measured Houseplant FoodOsmocote PotShots Pre Measured Houseplant Food Know the volume of your container Do you know the volume of your container in quarts or gallons? If not, just measure its width at the widest point. Then use the table below to determine how many Osmocote PotShots you will need. Easy to apply. Once you've determined how many PotShots you'll need, it's easy to order them. Simply place the nugget(s) midway between the rim of the container and the stem of