A rock for mulch is good. They need a constant source of moisture.
Plant your native tree, shrub, or perennial in the ground
a water source such as a bird bath
dripping faucet, etc. where
the plant will receive regular water. DRIP IRRIGATION
RIPARIAN PLANTS. They will also commonly tolerate amendments and
Use a 30-50 pound rock next to each plant, preferably on the
side of the plant. Temperatures and moisture are dramatically moderated
If you can't plant your plants immediately, poke a few holes in the
bottom of the bag, place in morning sun or part shade, water once or
twice a week if needed. Relax, we've left them in the bags for months
with no problems.