Deficiency help

so plants are doing fine for the most part I’m using fox farm ocean forest soil and running roots organics master pack line at 5ml per gal haven’t been feeding much ppm meter says about 600 ppm after mixing... I have small def on my older fan leaves in about week 3 of flower do I need to increase nutes for this plant or is the fan leaf just dying off from natural causes... only reason I say that is all new growth and fan leafs around the buds are green and healthy... just monitor those leaves? If they start to turn obviously I need more feed? Also pretty sure I’m dealing with a Mg issue correct? Maybe potassium? Any advice thanks

Looks like Mg def to me, possibly K too.

I think something other than Mg but what do I know. How often do you water? How much water, do you feed every time? What else is in the soil? What lights? How big are the plants?

Looks like the new growth's got it some too, but maybe that's just the photo? What's in roots organic master pack line? does it give a NPK? Want to rule out lockout. Is it a nutrient hungry strain?

Added a bit of dolomite lime to soil but that’s it... using a 1000w hps and a 600w led about 2 ft above plants no other plants have any burns or anything showing light being to close neither does this one really.... haven’t grown this strain before maybe someone else has its acid Dough by ripper seeds not sure if it’s a hungry strain or not... in my personal opinion I don’t believe it’s a lockout I think I just need to feed more but am just hesitant to over do nutes also been watering every 3 days roughly and I do feed every time but I have only fed these girls half dose up until last feeding.... the fox farm ocean forest took them well into flower I have only done about 6 waterings nutrients at less than 5ml per gal

Whats your pH running?

Renfro said:

Whats your pH running?

Click to expand...

6.5-6.8

This is a picture with lights off and flash

These pictures are better. Again I'm not a nutrient expert or anything else just try to keep up. I do wonder if you could use some perlite though I wouldn't repot now. But you have powerful lights so probably not overwatered. So being on the older leaves gives another clue that it is probably a mobile nutient, or so they say. Had to double check what's mobile: N, P, K, Mg, B, and Mb are mobile in the plant. Mn and Zn are less mobile, and Ca, S, Fe, and Cu are generally immobile. (from https://www.rollitup.org/t/nutrients-and-fertilising.356252/#post-4494245 ) Yeah sorry maybe it's Mg. You can try 1/2 tsp epsom per qt water. I'm like you I don't like to overdue the nutes. I think 600ppm enough usually especially if every time.