Plastic bottle irrigation - Something I tried a while back but not quite the way I did it. Drill a hole in the cap, cut the bottom off the bottle, bury the top of the bottle near the roots and add water regularly.
How to make a Sub-Irrigated Planter. I'm not sure I would use a two liter plastic bottle though. Over time I would fear the plastic breaking down enough to poison the plant. Perhaps a wine bottle instead.
Self Watering Thermal Insulated Greenhouse for Seedlings/cuttings From Water Bottle.
Self watering thermal insulated greenhouse for seedlings/cuttings from water bottle. Poke a hole in the bottom of the styrofoam cup and push through a rolled up paper towel or other item to use as a wick for the water.
How To Make Self-watering Seed Starter Pots. We are excited to share with you this recycling project. It is truly green and fun. You do not only recycle those plastic water bottles, but also make self-watering seed starter pots for you to start your herb
Self watering hanging basket. The link shows putting a small pot in center and filling with water but I like the water bottle idea shown in illustration.remember to line bottom with plastic bag (between the soil and fiber or moss) - Gardening For Life