Intensive gardening with soda bottles
I want to use soda bottles, 2 liters, to plant in burying them with the bottom open, so to plant things closer.
What can be planted in them, and how close can I plant,what varieties of vegetables, herbal or tea plants will grow tall instead of outward, or what plants are easy to prune to grow upward?
Things can be planted much closer if it would work. Any ideas?
I've given up on my bottles as irregation because of intensive labor and unreliability. Space is an issue above ground or below as well. 2 liter bottles are not small and if only holding water, will take up half the garden.