White fuzz covering my paper seed pots looked like a gardening disaster. But was it harmful mold or something more serious? Here's what I learned about fungus, airflow, and keeping seedlings healthy.

I've tried just about every kind of seed-starting container—from plastic trays and peat pellets to soil blocks and homemade paper pots. Here's what I've learned about the real tradeoffs between cost, convenience, sustainability, space, labor, and what actually goes into the container.