I doubt this is why they are called white widow!!!! But mine are acually getting those white leafs at the bottom... funny thing is that my male plant that I just threwed away hade nice green leafs and where bushy with lots of secondary (bud-shot-sites) internodes. I have a 600w Hps and I have 3 fans it's 81 degres farenheit they are 5 weeks old and 3 days into flowering. 3 where males and 5 is females.. think 3 of the females are white widow and 2 of them are bagseeds (5 females al2get.) The HPS is 2 feet away [24ich] from the top of the plants!! that not close because I have a aprox: 25 ich faan dirrect onto the lightbulb. I have these PH-papers that will change collor if diped in some acid/adic water or so.. mine results are betwen 6-7 in PH. I do water them every second day. and have just intreduced them to my formulex nutrients! 1/4 of streangth... but they where Like white before that my female ww. what could it be?? Please help!! Its starting to be anoing to have all leaf-pairs from bottom and upwards falling of plants!!