please RIT Help.. what is this

[fjkirk]

this happens when change to 12/12..any ideas..don't matter what strains always the same



coco/perlite half strength canna nutes, phed tap left 24 hours water..400w not all leaves you, deffo worse this time..any help appreciated.

 

[pseudobotanist]

How often r u adding nutes

 

[fjkirk]

Every feed mate.

 

[pseudobotanist]

I honestly wanna say it's a molybdenum issue. Maybe rethink the nutes you're using

 

[Hotboxbudz]

More pics would help, top, middle and bottom. Plus a pic of the whole plant.

 

[fjkirk]

More pics would help, top, middle and bottom. Plus a pic of the whole plant.

as above only starts appearing after switch..around bud sites most leaves are fine green look , doesn't seem to effect plants really, quality good to great yealds ok depending on strain..sure if found out what this was it would be better








they don't droop, drink fine, never just water feed with every drink, coco, seems bud sites are drawing something from leaves nearest to them..im stumped, seem rust spots but not like this..anything helpful would be appreciated

 

[pseudobotanist]

http://www.growweedeasy.com/molybdenum-deficiency-cannabis

 

[ttystikk]

You're running half strength nutes and they look hungry. Try bumping up towards full strength and see what happens. As humidity rises you'll want to up the nutrient solution strength, as plants will take up less water relative to dry conditions.

 

[Hotboxbudz]

View attachment 3458510

as above only starts appearing after switch..around bud sites most leaves are fine green look , doesn't seem to effect plants really, quality good to great yealds ok depending on strain..sure if found out what this was it would be better

View attachment 3458500


View attachment 3458505

View attachment 3458506 View attachment 3458511

they don't droop, drink fine, never just water feed with every drink, coco, seems bud sites are drawing something from leaves nearest to them..im stumped, seem rust spots but not like this..anything helpful would be appreciated



View attachment 3458509 View attachment 3458506

Just going by the pattern of leaf damage and it stating at the top, my guess would be boron deficiency. Look it up and compare it to what your seeing. Easy to fix, just need to start adding in a miro nutrient supplement to your feeding schedule. Might want to start feeding them a bit more and try to raise the humidity.

 

[fjkirk]

thanks..looked both suggestions, I'm not sure, why would it only appear after change over? There not acting sick at all, young plants v green look great..il look into both suggestions and I'm going to up nutes..(slowly)




thanks.

 

[Po boy]

I honestly wanna say it's a molybdenum issue. Maybe rethink the nutes you're using

i agree............