There are several new technology devices that help gardeners keep their lawns looking lush and green. For instance, a weather-based irrigation controller costs about $450 and gauges rainfall to determine how much water is needed for the soil. A wireless rain-and-freeze sensor costs $99 and alters watering according to the weather conditions. A soil moisture-sensor kit costs $179 and uses sensors in the ground to assess moisture and develop a watering schedule.

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