One of my NEW EXPERIMENTS this year will be trying different ideas for DIY SWC (Self Watering Container) and SIP (Sub-irrigated Planter).
I've been looking at different designs and plans on-line for a while now. I want to stick with something simple that I can make easily, hopefully with minimum need to purchase supplies.
For starters, I made these from recycled 2L soda bottles and drinking straws.
I made the two for Dwarf Orange Pixie tomato seedlings a while ago, but it had been worrying me that there was no vent/drainage hole for the water reservoir. It has been my observation that most of the recent designs provide for an air space between the soil and the water surface in the reservoir.
Today, while I was making two more containers for the sprouted/germinated luffa seeds, I had an moment when a portion of the sidewall kept buckling inward.
I punched poles on opposite sides of the outer reservoir container, then aligned the buckled part of the inner container with the hole, then pushed a straw in the gap so the bottom of the straw is in the airspace above the water.
It was an easy retrofit to make for the tomato containers as well. Now there is a ventilation/watering tube. I'm not worried about drainage hole for these since they will be indoors and watering will be strictly monitored.
Luffa containers needed a humidity cover, and it turns out the quart size zip bag (also previously used) fits perfectly, and all I had to do was cut the corner off to let the straw out. Once the luffa seeds sprout, I'll cut off the other corner for better ventilation.