Roll your own biodegradable seedling pots from strips of newspaper

Toronto-based manufacturer Richters produces a "PotMaker" that uses two chunks of maple-wood to turn strips of newspaper into biodegradable seedling pots. Fill them with soil, plant your seedlings, and transfer them to the garden when you're ready to plant. The newspaper disintegrates shortly after planting.

Potmaker Step-by-Step Instructions (via Make)