Is this a deficiency or disease?

[peartech]

I'm 4 weeks into veg and the bottom leaves of my GG4 are showing signs of a deficiency, disease, maybe mites?

The girls are being fertilized once a week with FF Grow Big, B52, Voodo Juice, and CalMag, using RO water, ~900PPM, 5.8ph, FF OF soil

Does anybody seem to know what could be causing this? Thanks in advance!

 

[Budley Doright]

I dont know for sure....but I can at least provide some perspective....

My experience for calcium def are spots with dark edges.....

thats pic 3....

the other pics show some of that..... but also a differnt sort of spot.... along the veins....

which is potential over fert.....

where the ph is possibly too low...and makes too many metals too available....and the spots occur as a result....

 

[iampolluted]

Your experiencing a cal mag lockout from the pH being too low. Flush with a decent amount of water. You should be feeding at 6.5-7. Keep the pH there and the issue should clear up later. Those leaves won't recover. I'd just pull the leaves and keep an eye on the lower leaves, that's where you'll see it manifest 1st.

 

[Budley Doright]

Im not sure he should be experiencing a problem at 5.8.... I sort of suspected that it was less than 5.8

SInce you are in soil...a mild acidic ph is proper.... 6.5 to 6.8 although as my friend says..... 7 is ok too.....

 

[Blueshark]

Your experiencing a cal mag lockout from the pH being too low. Flush with a decent amount of water. You should be feeding at 6.5-7. Keep the pH there and the issue should clear up later. Those leaves won't recover. I'd just pull the leaves and keep an eye on the lower leaves, that's where you'll see it manifest 1st.

** I agree with the above.... My soil gets nutes solution at a ph of 6.8. adjust it and see how they look in a couple weeks

 

[peartech]

Thank you for the feedback, everyone I appreciate it!

Should I give it a feeding of water + CalMag immediately? Or should I wait until the next feeding and up the CalMag? I generally fert about once a week (nutes, flush, flush, repeat). Should I continue to flush twice until I feed her more CalMag?

 

[iampolluted]

I feed (until thoroughly wet but not running off) water til runoff, and feed again. I'd water til runoff once or twice and go back to feeding. Or flush em with 2-3 times your pot size and start feeding again when they dry up. Follow the instructions on the bottles and you should be fine. Just keep your pH 6.5-7 and they'll be fine.

 

[ChasingGreen]

So you guys actually PH the water even though you're growing in soil? I was at first but now I stopped and I started to see this exact deficiency as the OP, in OF soil. My water from the tap is at PH 8. Wondering if I should go back to PH'ing the water before feeding?

 

[Heinrich]

peartech, nutes, flush, flush, repeat is not good for the plants I think. They don't need that often flushing, you are depriving them of food. Flush like once a month. And you are getting calcium def. Provide them with calcium ASAP.



No need to use RO water. Raise the PH a little.