Hey guys, i'm new here, and I'm also new to growing things, this is my first attempt and i'm lost.

Basically, i'm trying to grow a watermelon plant (?) on my windowsil (for now..) I don't have a greenhouse or any kind of outdoor place to grow it, apart from a small garden). I started by reading a few guides on how to plant the seeds and I have some small plants growing now. Here are some pictures.

http://ihasaseed.com/a4/dom/watermelon/DSCF5991.JPG
http://ihasaseed.com/a4/dom/watermelon/DSCF5992.JPG
http://ihasaseed.com/a4/dom/watermelon/DSCF5994.JPG

(I didn't want to link the actual images in the thread because they're about 1000x750res)

Im now wondering where to go from here, do I move them to a bigger pot, to somewhere bigger or will they be fine where they are for now? I've been watering them about once or twice a week (as I read on a few guides online).

Thanks for your help in advance.

(by the way, i'm living in north east of england, where at the moment the temprature is around 17-23°c)

- Dom