5 Gallon Bucket Garden Stand Diy . It takes just (8) 2 x 4 x 8's to build the quad bucket planter, and just (6) for the dual planter. $8.50) fine sandpaper (i used 400 grit, already owned). 5 Gallon Bucket Garden Rack Plans / Grow Food In 5 Gallon Buckets 15 from gustavothomas.blogspot.com Hole near the bottom of each one. Then a simple 5 gallon bucket garden we built might be a great solution for you. Building the 5 gallon bucket planter boxes.