Edyn Smart Garden System (Sensor $99.99; Water Valve $59.99)

Edyn's solar-powered Garden Sensor monitors and tracks environmental conditions, such as light, humidity, temperature, soil nutrition, and moisture to help you make smart planting choices and to alert you when your plants need to be fertilized, watered, or harvested. And if you have an existing water system, the Edyn Water Valve can automatically water your plants when they need it based on data collected by the Garden Sensor. You can also use the Edyn app (free) to manually water your plants from anywhere.