7. Place the top half of the bottle into the bottom half of the bottle and make sure the yarn reaches the water at the bottom. This will self-water, since the water molecules in the moist soil will attract the water molecules from the bottom of the bottle and pull water up through the porous yarn.
8. Leave this beside a windowsill for a few week and transfer to a larger pot or to a garden once the seedling has a few sets of leaves.
Alternatively, you can follow this visual guide!
Al
(Image courtesy of Providentliving.org.nz)