I've volunteered with a group that replants native oak seedlings in the hills of San Mateo county. What's needed there is protection from being eaten by fauna while still seedlings. The solution? Use wire cages to surround the seedlings. By the time they outgrow the cages, they are too thick to make for easy snacks.
> Called the Cocoon, this simple invention protects seedlings from harsh arid climates and reduces the amount of water they need to thrive–and boosts their survival rate by as much as 80%.