If this really works...how totally awesome???!!!! Garden Tower Project » The Homestead Survival vertical planter with a worm tower in the center really works. You add kitchen scraps into the center tower which creates a compost tea that drips out the bottom which you add back into the plants. Each hole can grow a different plant. 50 plants in 4 sq. ft.- Strawberries, lettuce, herbs, flowers... endless possibilities! Look at ALL the combinations!