Turn the 5-gallon plastic bucket upside down. The bucket is going to be your container for the upside-down planter.
Attach a large drill bit to an electric drill. Drill a 1- to 3-inch diameter hole in the center of the bottom of the bucket.
Pour potting soil into the bucket to completely fill it. Tap the dirt down slightly. Add additional potting soil to finish filling the bucket.
Set two coffee filters on top of each other in the center of the dirt. The coffee filters will hold the dirt in the bucket when you turn it upside down.
Open a tube or bottle of super glue made for plastics. Place a thin layer of the glue around the rim on the bucket. Quickly place the lid on the bucket. Allow to dry for 15 minutes.
Flip the 5-gallon plastic bucket over. You will now see the hole you drilled with the coffee filters holding the dirt in place. Cut a small hole in the coffee filter with a pair of scissors.
Select a seedling. Gently squeeze the roots to unbind them. Plant the seedling in the hole. Repeat with one to three seedlings. Water thoroughly.
Let the seedling grow to 1 foot tall. Flip the bucket upside down and hang it in a place of your choosing.