weird yellowing?

[Georgety]

Hey guys,
My plants are in their 9th week outdoor grow using all fox farm soil/nutes and only recently started showing a couple strange yellow spots, just wanted to know what you think the problem could be? Thanks!

 

[ebcrew]

Most likely calcium deficiency or pH lockout of calcium... Fox farms soil and nutes are lacking in calcium and magnesium i always add something to balance out the soil or calmag when i feed.

 

[Diabolical666]

Your plant is revegging so its going to act all kinda wacked for a bit till it decides what its going to do. Are you feeding bloom nutes?

 

[Georgety]

Thanks ebcrew for the tip,
I use both the grow big and big bloom according to the feeding chart fox farm has on its site

 

[ebcrew]

Thanks ebcrew for the tip,
I use both the grow big and big bloom according to the feeding chart fox farm has on its site

Yep i use happy frog and ocean forest mixed, and their trio of nutes (big grow, big bloom and tiger bloom). Calmag is almost always needed with their products. Im pretty unhappy with fox farm, if i could find a better store ready soil id switch tommorow. If any one has any knowledge of a better store ready soil please let me know.

Also its very important to check your pH. Plants cant absorb calcium if your pH is lower then 6.5. I try to keep my soil pH between 6.6-6.7.

 

[cowboyferg]

It kinda looks like splash damage to me are you misting or foliage spraying with the light on or putting them back under the light with the leafs wet?