Are you growing in a grow tent?

If so read this http://boards.cannabis.com/plant-pro...-anything.html

symptoms look very familiar......

If you are killing everything in your growroom, different strains, different occasions. I would guess its enviromental.

Subzero
subzero Reviewed by subzero on . Help please, 8 plants already dead, one left :(. yellowing or n def. or sumthin HELPPP please... i had 2 bluecheese and 4 shaman and 2 churches and they are ALL dead, except this bluecheese which is on the way. I really cant figure out what is wrong with them :(. a week or so ago it was fine n all and now its half dead. im growing in 1cm RC cubes under a 250 metal halide, air circulation is good and temp is between 22-24c. Rating: 5