According to EdibleContainerGardening.com, tomato plants grow well in containers as small as a 5-gallon bucket. Larger containers are needed for larger tomato plants. The 5-gallon bucket is recommended for smaller tomato plants, such as the Roma tomato, which grows to an average height of 4-feet. For larger plants containers up to 20-gallons give the plants adequate space to develop root systems.
About this Author
Cyn Vela is a freelance writer and professional blogger. Her work has been published on dozens of websites, as well as in local print publications. Vela's articles usually focus on where her passions lie: writing, web development, blogging, parenting, gardening, and health and wellness. She studied English literature at Del Mar College, and at the University of Texas at San Antonio.