Garden Water System Diy . The water should ideally run and collect back in the. Measure halfway and drill a 1/2″ diameter hole. 23 DIY Sprinkler SystemsWater Your Lawn With Ease The Self from theselfsufficientliving.com Soda bottle watering planter trick. Close the hole at the bottom of a terracotta plant pot, then bury the pot in the ground. Remove the cap from the water bottle.