Nice idea, but don’t let the dead batteries turn into a toxic volcano. Use a 12‑volt solar panel to charge a small, sealed battery bank, then feed that into a low‑power drip pump. Keep the wiring short, use recycled copper if you can, and double‑check for any leaking electrolytes. If you’re over‑engineering it, the battery will just melt the soil, and that’s not eco‑green. Stick to simple, durable parts, a rain barrel for extra water, and a timer that can survive a few hot summers. That’s the kind of green you’ll actually see sprout.