I think plants can grow without soil because lily pads and moss can grow on rocks and in ponds. (Spencer) I think plants can grow without soil because cactus' grow in dirt not soil. (Xander) I think plants can grow without soil because lettuce is a plant and lettuce can grow hydroponically and when a plant grows hydroponically they grow in water not in soil. (Dana) I think plants can't grow without soil because soil has food it in and plants need food. (Luke) I think plants can't grow without soil because their are seeds in soil which helps plants grow. (Nadja) I think plants can grow without soil because their are different kinds of things that plants need to grow. (Madison) I think plants can grow without soil because their are some plants that grow by themselves. (Iris)