I agree. Plant watering really doesn't require any kind of electrical solution. There are oodles of self watering planters which rely on a reservoir and gravity

I agree. Plant watering really doesn't require any kind of electrical solution. There are oodles of self watering planters which rely on a reservoir and gravity. But for the HNers with a slightly greener thumb: I have a big sanseviera which I use as a kind of alarm clock. Whenever it gets droopy, I know it's time to water all my plants. And because it's a big and hardy plant, it prevents me from overwatering my other plants.