"The wheels keep clogging with soil." Solution: Use a vacuum cleaner on the wheels daily. Better yet, place the cart on a large plastic boot tray to catch any spillage.
Look for systems with water level indicators to prevent overwatering and mess. Tips for a Successful Classroom Garden classroom 6x grow a garden portable
Here’s a short, engaging text about a portable 6x classroom garden: "The wheels keep clogging with soil