Here is another smart tool that lets you water your garden more effectively. The Melnor Raincloud is an internet controlled irrigation timer that you can control from your smartphone, tablet, or computer. It supports up to 4 zones with 1 faucet. The device helps you save water and automate watering your garden thanks to a smart moisture sensor.
Raincloud lets you choose complex schedules for your garden. It is available for under $150 at this time.