Inteligent Plant Watering System

I recently built this project for my tomatos but now is watering normal plant, it has 5v pump, tranzistor, cool soil moisture sensor(with metal rods) and some wires, currently it has Arduino Uno as controller because analog pin on ESP8266 has max. 1v(Sensor has digital pin but i want to also monitor the moisture on web panel) so maybe after ordering a ADC i will switch to it.