What's soil blocking? This seeding method helps gardeners use less plastic and peat

Grace Wertanen, the "seedling intern" at Growing Hope Urban Farm in Ypsilanti, Mich. carries a tray of soil blocked plants

Soil blocking is an environmentally friendly method to prep seedlings. The technique has captured the attention of serious gardeners who'd like to make their growing more sustainable.

(Image credit: Neda Ulaby)