Set the plants on a sheet of corrugated plastic at an angle. Put a rain gutter on the end also at an angle so it catches in a pan. Then dump pan or pump it....
These are about $12 each but you can run pvc pipe wherever you need I collect in gallon jugs and use runoff to water house plants and flowers - please ignore the mess tent needs cleaned before I start the next flower run
i just use a rubbermaid tote, will be pumping the shit out this time instead of hauling it out daily or every other day. moving three gallons of water is a pain in the ass and i'm lazy.