Cut a plastic bottle in half and then continue to cut out rings of plastic. Place each plastic ring around a seedling, to protect it from slugs and other bugs.
Get a clean bottle; make sure there’s no moisture in it. Use it to store seeds. (It works especially well for peas and beans.)
Use any size bottle, but pick two. Just make sure both are exactly the same size. Cut out two rectangles from the bottom of each bottle half. These will be the slug’s doors. Then slot the bottle halves together, so the openings line up, and staple the two parts together. Fill the bottom with a little old beer, and insert the container into the ground. Slugs will walk in, but they won’t walk out.
You’ll use the half of the plastic bottle with the cap. Pierce a hole through the cap with a nail, and screw the cap on. Insert the bottle half into the ground at the base of a plant, so the cap is in the ground, and the opening is facing the sky. If you have to leave for a few days, but still want your plant watered, fill the container before you leave, and the water will drip out slowly over time, soaking into the soil.
Cut off the top of plastic bottles (with the cap on) and place them around your seedlings. The plastic traps the moisture just like a greenhouse. It can also protect against frost.
Take a whole plastic bottle and make a hole in the cap. Fill the bottle with water. Turn the bottle upside down and squeeze it to water young seedlings that could be damaged by larger gushes of water.
Take a larger plastic bottle. Turn it on its side, and cut out a rectangle. Pierce holes in the opposite side, to act as drainage. Fill it with compost and soil. Plant the seeds in the soil, and watch them grow.