7. Super Tall
Image: The Hearty Soul
If you plan on growing your own wild lettuce it’s important to know just how big these suckers can get. Left unattended, a wild lettuce plant can grow up to 7 feet tall. They are also a biennial plant, so their leaves do change colors depending on the season. For those of you that don’t have a green thumb, however, there is a perfect alternative for you.