Kelp Grow is a spray that made a major role in the episode Giant Squidward. SpongeBob and Patrick use it to do good deeds. The kelp grow helps any type of kelp to develop in seconds if you are impatient. The company of Kelp Grow makes products used to help plants develop faster, like soil.
The bottle is yellow with a green burst effect. In blue capitalized letters are the words "Kelp Grow". The bottle has a white top.
It is used to revive withered kelp. If it's sprayed on anything else, it makes that bigger. SpongeBob and Patrick thought that if you turn the bottle upside-down it will shrink things but, they were wrong.