In this case, the box was 33 tall x 18.5 wide x 18 deep to house starter plants and those that will reach a max height of about 24. Of course, if you wish to build bigger, add to the below. Materials will depend on what size you want the box to be.
Diy multi level planter box
Diy orchid planter box
4x4 planter box diy
24 DIY Grow Boxes to Control the Growing Environment Home And
