The hinges of the CD case should be at the top. That way you can stand them up and dirt won’t fall out. Also this leaves a nice hole at the top for watering the plants with droppers.
Plant your bean high in the soil. If you plant it toward the bottom the roots will grow out the bottom!
Tape the bottom shut. This will keep roots from growing out the bottom, and curious fingers from opening the case.
Use masking tape and permanent markers to label whose plant is whose.
Plant your bean with the concave side down. It should resemble the letter “n,” not the letter “u.”
Source : It’s time to spill the beans…