Squidward's Flower Garden so far just appears in the TV-Movie Truth or Square in a flashback of Squidward. Before SpongeBob lived beside Squidward, Squidward had a small Flower Garden, where he probably watered and worked on his garden everyday.
A boat from above tipped and a pineapple that is now SpongeBob's House landed on it destroying all of his plants and the little fountain that was there. This could possibly be the reason that Squidward hates SpongeBob. It is a rumor that the plants around Spongebob's house is from the garden, and the windows, door, and pipe are made from the fountain.
The garden is bordered with the same flowers that are on the sides of Spongebob's house with normal flowers in between just behind them, there's a small patch of grass with a statue of a squid spitting water into the small foundtain below it. But currently only the flowers remain, and possibly some remains of the fountain.
- The outline size of SpongeBob's house could be the same size as the garden, since the flowers on the sides of SpongeBob's house could be the flowers from Squidward's garden.