Next Steps:

Ideally: 

• The system will be even smarter by incorporating more sensors to be a more comprehensive system. For instance, notifications to cellphones for the level of soil moisture, cellphone control that's similar to Apple's Homekit, etc.

• Deeper incorporation with IFTTT. For instance, getting access to the weather channels' data, knowing exactly what time is going to rain, and preparing predicative mechanisms.

• Multiple colors of LEDs indicating different states of operations.
• There can be backup mechanisms. For instance, what if soil moisture sensor malfunctions? There should be a secondary sensor that prevents malfunctions from happening.