Yellowing and White Leaves???

[jmj3480]

Hello. Im doing my 4th grow. All my grows have consisted of same strain and nutes.

Im running: 1000 HPS
Bio Thrive Bloom and Bio Bud as directed
Temps 75 day/night and Hum 45% day/night
Ocean Forest/Pro Mix 70/30 cut

Im on day 40 of a 60 day flower. Ive grown this strain Blueberry/Trainwreck in the past under exact same conditions. Recenctly in this grow Ive noticed yellowing of the leaves coming directly out of the top buds. Ive never seen this before. I realize larger fan leaves yellow as nitrogen is used up but this is different. Some of the leaves are even turning white?? Its seems the yellow/white are starting on the inner leaf and moving out, the tips are affected also.
Possible nutrient def or nutrient burn? Light bleaching?

Thanks in advance
I cant post pic here for some reason.

I posted pic here earlier

Grasscity.com Forums (http://forum.grasscity.com/attachment.php?attachmentid=822308&d=1329832252)

[polishpollack]

sulphur deficiency, which is treatable with epsom salts. one level teaspoon in a gallon of water and give that, not all of it, just about a cup's worth.

[jmj3480]

thanks for reply. were you able to see the pic? I was having trouble getting image on this site. The link is in my previous post. Thanks again

[jmj3480]

I got it to work. See the leaves coming from buds are yellow and some even white?

282867

[polishpollack]

I'm sorry but it's out of focus. Looks like the plant is almost done and they die naturally, losing their green color.

[Native¥organicfarmer]

one light bleaching (White leaves) to close to light to hot
two the plant naturally leaves dies turns yellow all part of life cycle
three you might have been giving to much n last cycles
four you got your feeding right.....!

i aslo grow similar trainwreck/blue also wheelchair/blue its all a matter of the plants life cycle some turn in 5th week some in 8th depends on room and strain, i also run whites that do purple/yellow in last 2weeks, but i trigger all things by environmental changes, but from what i can see they look fine as late in flowering it seems they are right on time to use up that n stored in the plant.