The Grow Awards 2026 🏆 
Strange yellow spots
TimTheTerpMananswered grow question 6y ago
According to your log your pH is a bit high.. this can cause a lockout of iron which it looks like what its doing.. shoot between 6.0 and 6.5 if possible! Cheers and happy growing!
Similar Grow Questions
Solved
spacetimeman
yellow leavesWhat do you thing guys about those yellow leaves? Is it nitrogen lack?Week 4
Leaves. Color - Yellow
5y ago
1
1
Solved
Makers_Mark12
Brown spostYellow brown spots on older leavesWeek 5
Leaves. Color - Yellow
6y ago
3
Solved
CreamOfTheCrop
Possible deficiency/humidity/pH problemI've been struggling with same problem from beginning of grow - leaves having these dry yellow/white spots. The first week I used too high pH which later I replaced by rainwater - new leaves were healthy, but last night I left tent at 70% RH. Somehow it returned - still rainwaterLeaves. Tips - Burnt
Leaves. Color - Yellow
Leaves. Color - Pale
6y ago
1
2
Solved
Cezar
the leaves turn yellowthe leaves turn yellow
Hello dear colleagues
you can help me with this problem, I am new in the field and I don't know what they suffered.
watch the pictures please!
PH 6,3
LUCE 19~5
WEEK 5
thank you
YOU ARE THE STRONGEST GROUP !!!Leaves. Webbing
Leaves. Veins - yellow between
Leaves. Color - Yellow
5y ago
6
6
Solved
Everest
yellowed leavesThe leaves started to turn yellow from the inside out. I don't know if it's a disability or an overdose. I'm using Biobizz. Someone solve? Is it in flowering with about 5 weeks to harvest, is it worth stirring or better leaving it like this?Week 8
Leaves. Color - Yellow
5y ago
2
2
Solved
420pete
Any ideas to what might be causing these leaves to yellow/die? Only reasons I can think of are nutrient lockout, having the lights too close (although I've heard with CFLs theres pretty much no such thing as too close) or possible having the heater running, or constant fan airWeek 3
Leaves. Color - Yellow
7y ago
5
7
Solved
Viccrazyweed
Critical showing deficiency or excess, anyone know how to solve it???One of my beauties is showing for the first time a nutrient issue, a couple of leaves are showing yellow colouring, the very rest of the plant is homogeneous deep green so i assume she is almost fine, but i really want to listen to her and care, I think it could be nitrogen def3y ago
2
3
Solved
Dillsnills
Advice on what's going on with this plant some yellow and brown on the leavesLooking for help to diagnose what's going on w this plant,did a mini flush ppm runoff 610 intake 345ppm, wk 7 flowering Girl Scout Cookie Auto GardenOfGreen, should I do a nute feeding next,FF chaching,big bud? Ph6.5. Advice input opinions greatly appreciated.Leaves. Color - Yellow
Leaves. Color - Dark-brown
Feeding. Deficiences
5y ago
1
1
Solved
DrBinoc
Magnesium or Nutrient Burn or?Magnesium deficiency, or nutrient burn or??? Only on the lower leaves so far, curling down was existing genetics - but the burnt tips are new and some have even curled up now. Probably 5+ weeks left so too early for natural dying off?Leaves. Tips - Burnt
Leaves. Color - Yellow
6y ago
5
4
Solved
Realtree8858
Couple yellow leavesfirst true leaves are turning yellow in both plants.small tips on 2 other leaves. This is "california super soil" bottom 1/3 and fox farm the upper 2/3. Supposed to feed the whole grow. Feeding only RO water, 4 cups every three days or so. Soil to hot for the young plants?Week 2
Leaves. Color - Yellow
2y ago
3
Solved
JustGrowWithIt420
Leaves bright greenSo I have ruled out the fact that this is not a ph problem, have been properly watering at a consistent ph of 6.5, tested the run off today and it's at a pH of 6.4, also there is purple stems and the main stock has purple running through it as well?!?! Is this lack of pk? ca/mg?4y ago
5
5
Solved
Gundermann
Calcium deficiency or overfed?Hi.
This is about my Apricot Auto which already suffered the yellow tips/edges. I took that as the result of heat/light stress.
Now she also developed discoloration and brown spots on some of the leaves. It looks like a Calcium deficiency to me, but I am quite uncertain.
Thanks!7mo ago
6
5
Solved
known2funk
We've had some really warm weather the past few days. This morning, just before the lights switched off, i saw it was 31.1 degrees C in the grow tent. Are the yellowing leaves a concern? The yellowest leaves are really brittle. I don't believe they're under-waterd.Week 13
Leaves. Color - Yellow
3y ago
2
2
