You have ignored my responses back to you after you PM'd and e-mailed me to start the conversation.
The EcoArduino sample code apparently refers to a sunflower.cpp and sunflower.h library that is not available for public download, so it will be hard for anyone to provide specific help without being able to compile code specifically for that board and the sensors it purports to support.
Here's an example of it not working
http://stackoverflow.com/questions/13159119/ecoduino-flower-watering-kit-does-not-compile