Did you know that you can recycle toilet paper rolls for use as pots for your seedlings? Simply place them tightly one against the other on a waterproof tray. Now fill them with potting soil and sow your seeds, watering and caring for them as you usually would. At transplanting time, don’t bother removing the roll: just plant up the seedlings as is, roll and all. Like peat pots, toilet paper rolls are biodegradable and roots will have no problem penetrating them.
Do note that mold will sometimes form on the outside of the roll. This is simply the first stage of the roll’s decomposition and will not affect the plants.