Flipp said:

Nitrogen deficiency
Soil ph imbalance. If your soil pH is off — say, too high (>7) or too low (<6) — the roots can’t take up nitrogen, iron, or magnesium properly. That gives this same lightening/yellowing look..
Overwatering / root oxygen deprivation
The soil looks heavy on perlite (which is great), but if you’ve been keeping it too moist, the roots might not be breathing. That stunts uptake
Chlorine or chloramine in water
If you’re using straight tap water, the chlorine can knock down beneficial microbes and stall nutrient cycling — especially in “super soil”If that’s the case, dechlorinate your water by letting it sit out 24 hours or using a drop of ascorbic acid (vitamin C). Bubble it too.

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chloec said:

thanks for your response! i haven’t been doing anything to my water just using tap . I just got testing strips and my water is about 7 pH. For peat moss I read it’s about 6-6.5, how would I go about lowering the pH of my water?

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chloec said:

hi! looking for any help/advice on why she's yellowing on the tips/the first set of leaves after the cotyledons are completely dried up and yellow.
Here's my set up
growing material: 70% sphagnum peat moss 30% perlite. Update: I just read on the bad of perlite that its been sprayed with plant food already- could this be the source of my yellowing plants?
nutes: green gaia 4-4-4. I added 2 tsp to top layer of soil on week 4 of growing and followed instructions and she started yellowing about 5 days later- was it too much?
Water: I've been trying to follow watering guides, making sure the top layer is dried out but I may have over watered.
She is an orange dream tangerine autoflower and is growing in a 3 gallon pot under a relatively cheap grow light that says its 1000W and I have it at 35% about 18-20in away from my plant.
That's about all the information I have. Would be very grateful for any tips/advice. Thanks!

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JIMKSI64 said:

The composition you are using has no pH buffers. I would recommend using the gia green in a good quality potting soil. pH will change as the soil gets warm and wet from nutrition conversion. Have to get them ions from someplace.
Wet feet from over watering may have turned the bottom of the pot but I do not think the roots are even that deep.
The plant is way behind and you should be talking about flipping to flower instead of the tiny growth you have. I do not think you will amend the soil from this position.
If the perlite with nutes is that green bag miracle grow I do not think so. It is .01 .01 .01 on the bag and that's almost nothing.
Can try a repot into a nice fabric pot but prolly dead.

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Halloweed said:

I just use ph down but I believe lemon juice does if you are growing organically. My ph is super high out of the tap. Like 8.5 to 9. Hope that helps.

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