the two most important things I can suggest are starting with a LIGHT seedling starter soil, then transplant into a compost mix once they are definitely established...
and start in very small containers to start, usually transplanting once more in veg (when you start to feed) and then another final transplant when you begin to flower. I see many people just toss a seed into some dirt and have no problems. I, on the other hand, had major lockout and dwarfing problems because I used composted manure and humus, while having them in too large of containers. The roots weren't growing efficiently and left stagnant water in the pot. As a last resort, I broke the soil away from all the stunted plants and transplanted them into seedling starter in smaller containers. Within almost 24 hours, green was restored and growth had resumed. They were at the point of crispy white leaves, with small amounts of light green left on top, and now they are picture perfect. It sucks because I read all of these suggestions, but seemed to get too excited and just did what I thought would be alright. Point of story... Read and Perform! :thumbsup:
Threads like these helped A LOT!!
http://boards.cannabis.com/basic-gro...ency-baby.html
http://boards.cannabis.com/grow-faqs...large-pot.html

Hope that helped
Stay and Keep :jointsmile: