okay i have a couple seeds that been growing for about 4 weeks.....i have a 62 x 29 x 72 in. groww tent with a single 6 in duck booster fan (pretty loud) and i have (8) cfl light bulbs hanging over a 72 cell germination station...i clocked the temp at 78 - 80 never more or less....i have them on a 18/6 light cycle and im wondering if thats cool being that its only the 4th week..and i just recently started using nutes....i have about 12 babies growing but on 2 of them the tip of the leaves r looking like there being burned...idk what causes it....... Any suggestions?????????
Did you not just answer your own question right there? Burning on the leaf tips is quite often nute burn... Hard to say for sure with no pics, but look up a few pics of nute burn and compare them to what you have... You probably started your nutes too strong... Depending on how bad it is, you can just cut back on your nutes next time, or flush first and try again with a weaker solution...