Diy Drip Irrigation System For Potted Plants . Then, cut the end of the tubing and cap it. This diy water irrigation system follows the same basic plan as others and it is really easy to assemble. Drip irrigation system Plant Waterers DIY Automatic drip water spikes from www.aliexpress.com Dig a small hole in the soil of the houseplant. We always have potted plants around our small decorative inground pond, and it makes perfect sense to let the pond do all the watering for us. Fit a main stainless steel valve to the first section from the soda bottle.