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This is a pretty involved build but far more useful than the "Spend $200 to Water a Begonia" projects you see everywhere on Raspberry Pi sites. With this automated version of hydroponics, as seen on Hackster, you don't just remove the dirt from farming but any semblance of actual work after you spend three months building it, that is.

This project uses a Raspberry Pi, a couple of Arduino UNOs, various electronic components and sensors, and a bunch of PVC and fittings. It monitors weather, nutrient levels, pH, temperature, air circulation, and lighting, all while offering mechanisms to control most of those. It is configured and managed via a smartphone app and is effectively an IoT system.

After you've browsed the bill of materials and assembly instructions, you'll no doubt wonder what the ROI and break-even points are for this, and there's no doubt you'll be eating $50 strawberries for a while. Just remember that the cost goes down every time you use it for both the food and the learning experience.

The rest is here:
12 Of The Best Raspberry Pi Projects To Check Out In 2023 - SlashGear