You can plant anything that would grow in the ground in a vertical garden. Carrots and other root vegetables turn out a little wonky shaped, but who cares about the shape! It would take 13 to 18 times more ground space to plant the same amount in a horizontal garden as you can in a vertical garden.
When spring is in full swing, you know what that means - it's time to plant your garden! Growing your own groceries is very rewarding and a lot of fun, but in order to make it worth your while, it's critical to know when to plant your seeds.