Water Spike

thingiverse

This is the *Water Spike*, a manual watering tool used to give each plant the same dose of water, slowly dripping (*Version 2.1*) or flowing (*Version 4*) onto the ground next to the plant. This limits the horizontal spread of the water, applies as much as possible directly to the plant and as less as possible to the unwanted weeds nearby. This is the basic idea, at least. Depending on the structure and clay content of the plant bed's ground it might work more or less well. I would advise to only make a few, test them carefully and then decide what's working for you.