I have made an Arduino Gardening system which helps to care for plants. The system includes a temperature sensor which controls recycled computer fans to moderate the temperature of the plants, LED lights to allow plants to be grown in low light areas and moisture sensors which record the moisture of the soil, indicating when the plants need to be watered.

The Gardening system was built to grow plants such as herbs indoors allowing plants to grow all year round and to grow plants which can not normally be grown in Canberra.

https://www.youtube.com/watch?v=zivgP_21B3Q