As an outdoor grower I advise that you start your plants on no more than 12-14 hours indoors. Otherwise when you put them out they will first try to go into flower, then they will return to veg. In the process you will lose about two weeks of grow time while they are confused by the different light cycle. Also, will need to harden them to sunlight or risk sunburning them. They will likely survive sunburn, but this also can slow down their growth. To harden them, you need to introduce them to direct sunlight for one hour the first day out, and then double the time until they are out all day. After 2-3 days out, leave them out for a couple nights as well to be sure they can handle the night time temperature drop, and then plant those suckers. You will invariably lose some growth, but depending on where you live and how long your summer is, not a serious consideration as nothing beats the ol' million+watt bulb in the sky. There are natural considerations to growing outdoors ( insects, animals, hail, etc. ) but if you are successful, you will realize a harvest far superior to any indoor grow, at least in terms of yield. Now some people will tell you about how high temperatures outdoors can harm THC production, but the reality is that the high temps will occur during veg stage, and actually equate to massive veg growth. I am here in Colorado, and my plants have been out for a little more than a month now.They have experienced some very cold nights, as low as 36 degrees, and this set them back a little. However, considering they have 4-5 months of season still to go, and are now growing at a rate of 2-3 inches a day,...well, you do the math. Also, nothing beats those enormous donkey dick colas ( I've grown one that was almost 3 feet long ) which outdoor grows can see. The only thing that can screw this up for you is if you have a strain that auto-flowers as it will not wait for the season to change before it starts budding. Good luck, and send me a PM if you need any other advice.