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http://site.cleanairgardening.com/info/grow-transplants-in-biodegradable-containers.html
Grow Transplants in Biodegradable Containers
October 4th, 2007 by kswanson56
If you decide to start your seeds indoors before gardening season, you can make transplanting them into your garden a bit easier if you grow the seedlings in biodegradable containers. Once it’s warm enough, all you have to do is plant the containers themselves in your garden rows. Biodegradable planters are made of material akin to thick paper, and will hold their rigidity long enough for you to plant them, though not much longer. As the season progresses, the organic containers will become soft enough for your plants to put their root systems through, and will ultimately break down into humus.
CONTAINER GARDENING 