Vets help!!! Worried 1st time grower. Spot found on leaf

Just found this spot on leaf, tiny brown spot. Plant is nice and green, did have two light green leafs earlier this week, that I have now cut off.
ProMix
Viperspectra 900w @ 3’ ( started at 18”) have since moved to 3’ after first signs of discoloration.
Temps: On 75/79 off 73/75
Nutes: fox farm trio: gave light feeding few days before week 3. It is now 3 weeks and 4 days from seed.

Light purple under help also

Watering 2 a week, will plan to water 1 a week.
Please help vets, much appreciated!

Whats the PH of your water/soil and how much are you feeding them? You should check these things next time you water. I don't think its a lighting or temperature issue because you would see the leafs drying out or looking like taco shells. There doesn't seem to be a pattern in the discoloration(starting from the top/bottom etc.) so I think it looks like toxicity in the soil from too much nutes. Also, for 3 weeks and 4 days / 25 days, she looks really small:/. It could be a strain thing..? I am also in the process of my first grow so all the knowledge I have is from the research I've done on the web. I hope this helps. Cheers and Good Luck Brother!

P.H checked regularly. 6.5. Also baught a soil test kit, also I. The 6-7 range.
I did a flush to hopefully wash nutes about 2 days ago.
Fingers crossed.

Thank you!

Just tested Soil PH. At 5.5...please advice

Mariosehr said:

Just tested Soil PH. At 5.5...please advice

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For soil an optimum root zone pH for cannabis is between 6.0 and 7.0, with the most time spent with a pH between 6.2 – 6.9.

Perhaps give a little fresh water, and leave it alone for 4-5 days.

Thanks. Yes water only. This morning found a few more tiny spots, and discoloration around he tiny brown spot.

Thanks man

May be beneficial to supplement calcium and magnesium, I use calimagic since it's on amazon and cheap. You can add 3ml per gallon.

I have been trying to look up symptom and it all looks like calcium deficiency. I just hope I don’t kill this plant. So I’ll plan to give her calcium and no feed, just water.

Mariosehr said:

I have been trying to look up symptom and it all looks like calcium deficiency. I just hope I don’t kill this plant. So I’ll plan to give her calcium and no feed, just water.

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Yeah, get some calmag, you can probably use epsom salts if you're on a budget. PH the water to the acceptable range, add some calmag or epsom salts (1/4 teaspoon per gallon), and leave her alone for 5 days minimum. Good luck.

real help? quit over watering. throw away the soil ph test kit. do you know what soil ph means? do you expect it to be the same as the water you're ph'ing? put it in at the right range and the soil will take care of itself. do you have any solution to check your ph meter? are you sure it's reading properly?
at this early stage, the curled leaves and discolorations are almost certainly caused by over watering. ten ML around the base of the plant daily would be enough for at least the next week, then i'd go up to 20ml a day. after a week of that, it ought to be ready for regular waterings

Roger A. Shrubber said:

real help? quit over watering. throw away the soil ph test kit. do you know what soil ph means? do you expect it to be the same as the water you're ph'ing? put it in at the right range and the soil will take care of itself. do you have any solution to check your ph meter? are you sure it's reading properly?
at this early stage, the curled leaves and discolorations are almost certainly caused by over watering. ten ML around the base of the plant daily would be enough for at least the next week, then i'd go up to 20ml a day. after a week of that, it ought to be ready for regular waterings

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Yes, I’ve realized I’ve been overwatering now. PH checked regularly, before watering. No don’t expect it to be the same. I’ll lay off the watering and food and hopefully it comes back healthy.
Thanks

athomegrowing said:

Yeah, get some calmag, you can probably use epsom salts if you're on a budget. PH the water to the acceptable range, add some calmag or epsom salts (1/4 teaspoon per gallon), and leave her alone for 5 days minimum. Good luck.

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Supplementing calcium, would that be considered feeding? Dumb question I know.
I will have it ready, if I don’t see improvement.
Thanks alot

np, i fucked up many plants before i started to figure shit out. still figuring, really

Roger A. Shrubber said:

np, i fucked up many plants before i started to figure shit out. still figuring, really

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Believe me, I appreciate the advice. Reading as much as I can. I’ll stick to the 10ml for a week then 20ml, do you think calcium has anything to do with the spots on leafs?

it doesn't need calcium. calcium deficiency manifests as little rust colored "freckles" randomly sprinkled on leaves.
try giving it 1/4 to 1/3 strength nutes every other time you water. looks like it might want a little n and mag, but don't ever do it.

https://www.growweedeasy.com/marijuana-symptoms-pictures
this is a pretty good guide to problems and deficiencies, just don't get any psychosomatic problems looking at it.

Much appreciated. Will do thanks