I'm not experienced with broccoli, so take this with a grain of salt.

As a rule of thumb, if seedlings are growing very thin and tall, it means they're not getting enough light. You'll need a light setup that keeps light on the plants. You can place the lights on a timer to save electricity.

Here is a link that might be useful: This link has some neat examples, both simple and advanced:

This post was edited by tanyuu on Sat, Feb 16, 13 at 13:53

Hi âÂÂtanyuuâÂÂ. It's a nice link for this type of problem, but your shared link is partially useful. I need some more useful tips which can able to solve this type of problem.