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Deficiency in flower help

I'll start off with my set up. 7x5x10 room with two 1000 led panels, 25c lights on 21c off, 45-50%rh . 2gallon pots growing in gia green living soil. Top dressed 2.5weeks ago with gia green bloom. On day 25 of flower. Bubba's gift clones.
Watering with tap water through a grow rite filter . Comes out at 6.0ph.
Started to notice 2 plants of the 15 starting to develop orange rust spots and yellowing a bit. One plant the leaves started to curl up and cup with yellowing and brown patches on leaves
 

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Emilya

Member of the Month: Mar 2019 - Grow Journal of the Month: Jan 2020
Looks like a magnesium deficiency to me. Supplement with calmag... it is good stuff. Maybe your filter is taking it out of your tap water, and then LED light tends to push plants into needing more of it too, but a magnesium deficiency is pretty common with these plants.
 

The Celt

Well-Known Member
I am inclined to agree with Emilya with a Mg def, which is more often than not actually a lockout due to excessive levels of K, rather than a deficiency. I don’t know the products being used, not familiar with them, but some Cal/Mg will likely correct the issues
 

NuttyProfessor

Grow Journal of the Month: Mar 2021
Too much potassium can cause the plant to have “lock out”. This will stop the plant from eating other vital elements, and other deficiencies will soon show cal/mag being one . If not solved quickly, it can have a lasting effect on your harvest.

The Effects of Potassium Excess.
Because Potassium excess will cause lock out of other nutrients, it can be wrongly diagnosed. Look at out for the top leaves growing thin blades. Middle leaves will develop burn around their tips. Flowering will be slow to start, and flower growth will be diminished.

after looking up your topdressing i wouldn't rule it out either its like a pk boost :goodluck:


The Effects of Phosphorus Excess.
Phosphorus Excess can be a difficult problem to diagnose. This is is because too much phosphorus will cause other nutrients to be “locked out”. You will see signs of cal/ Mag deficiency, because the plant can not absorb those nutrients. This will also affect plant growth, and will cause many issues, that will progressively get worse.


GAIA GREEN Power Bloom is a high phosphate fertilizer specifically formulated to support prolific flowering and fruiting.
 

TorturedSoul

Member of the Month: May 2009, Oct 2010, Sept 2017
I'll start off with my set up. 7x5x10 room with two 1000 led panels

Is that enough light for flowering photoperiodic plants in a 35 square foot space? What's the actual wattage of your two LED products?
 
Is that enough light for flowering photoperiodic plants in a 35 square foot space? What's the actual wattage of your two LED products?
I believe it's ample lighting, one is 650w and other is 580w . One is kindxl 1000 and other equinox 1000. Both boast 5x5 veg and 4x4 flower. I've never had both on max in the room or I get light burn issues
 
2 gallon pots are awfully small for trying to flower in soil, not saying thats the root cause of your problem but I can't imagine it helping.
That very well could be part of my issue. I usually grow in coco with 5 gallon pots but this run I wanted to experiment.
I cut clones, rooted and put in 4" cup for a week then into 2 gallon a week then flower. They were only about 6-8" tall when I flipped to flower. Now just over 2' tall
 

Emilya

Member of the Month: Mar 2019 - Grow Journal of the Month: Jan 2020
One thing to add. The living soil I'm using is peat moss and coco coir as the medium if that makes any difference
That makes a huge difference. Coco is not soil nor is it living. There is nothing in there for the plants. Everything they get will come from you.
 

PE636

Well-Known Member
Peat moss, perlite, coconut coir, fine bark, composted porcine litter, African night crawler worm castings, glacial rock dust, dolomite lime, feather meal, alfalfa meal, bone meal, rock phosphate, blood meal, fishbone meal, mineralized phosphate, insect frass, mined potassium sulphate, basalt rock dust, humic acid, gypsum, kelp meal, oyster shell flour, greensand.
 
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