Can a plant send tweets for water? It is possible, using a "do your own biology" approach.
From Mashable:
From SparkFun:
Botanicalls Kits let plants reach out for human help! They offer a connection to your leafy pal via online Twitter status updates to your mobile phone. When your plant needs water, it will post to let you know, and send its thanks when you show it love. It comes as a kit so that you can hone your soldering skills (or teach someone else) while you build a line of communication between you and your houseplant!
This kit comes with everything you need to get your plant tweeting in no time. The ATmega328 comes pre-programmed, but you can customize it with your own messages. The only thing you need to provide is a plant, network connection (and ethernet cable), and a power outlet.
I can just imagine seeing one of these in a science fair, complete with online social networking, perhaps tweeting to other plant's owners!
That is great, the only issue is that when you water it you can electrocute yourself... Interesting idea, but if you need a tweet to let you know that you need to water a plant you gotta put the phone down.
Really this is a wanderfull invention for non living things. And it will be only way to explain his needs.