I wrote a "plant growth monitor"
The aim is to record data about plants every day (for example size, temperature, humidity of the soil...) and then to make a graph using this data and have it available on the web for everyone to see.
It does this using PHP/MySQL and the jpGraph php library to generate graphs.
Note that this application can be used for anything else then plants. It can be used to track stock prices for examples...
Here is a link if you're interested
http://www.dergham.com/rolf/personnel/creations%20web/plant_growth/
Feel free to play around, adding plants, parameters, etc, but please
dont delete anything that you did not create yourself. thanks.
If you want to see a graph, go to page
http://www.dergham.com/rolf/personnel/creations%20web/plant_growth/?goto=show_pic
and choose year 07 and month january and just click "Draw".
You will see a graph because I already have entered some data for january 07.