Don’t throw away your toilet paper tubes, instead plant some veggie seeds in them. When the seedlings are ready to be transplanted, just plant the entire container. The bottom will open up as the roots grow down and the cardboard will protect the seedlings as it decomposes in the soil.
Take an empty toilet paper tube and cut in half so you have 2 equal sized tubes. Make 4 evenly spaced cuts approximately 3/4″ long. Fold up one section, rotate a quarter turn and fold up the next, and repeat. The last fold will need to be tucked under the first so they lock in place. There should be a small hole in the center.
Fill the finished tubes with quality soil and water thoroughly. After the water has drained out, plant your seeds according to the directions on the packet. I placed my seed tubes in a cut down milk container. It is the perfect size for 5 seed tubes, and will safely collect the extra water.
Once the seedlings are ready to be transplanted, you can place the entire tube in your garden without disturbing the delicate root system. Be sure to plant the seedlings in the garden with the same soil level that is in the tube. The tube should be taller than the dirt around it. This will help protect the seedlings from some garden pests as the plants adapt to the new area. As the roots grow down, the folded bottom will open up and decompose.