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.
Soaking seeds before planting is an old-time gardener trick. When you soak seeds before planting, you can significantly decrease the amount of time it takes for a seed to germinate. Reasons for soaking seeds & how to soak seeds. By Heather Rhoades