Nautical Mart is a store that appears in the episode "No Nose Knows."
Squidward buys flowers and other various things here.
Based on Squidward's description of the products he bought, it sells things that are organic.
Role in episode
Squidward comes home from grocery-shopping at Nautical Mart. He pulls out flowers from his bag, which SpongeBob abruptly appears smelling.
Later in the episode, Squidward is shown leaving the store with a bag of flowers, which Patrick smells after getting a nose.