Problem popped up but it's not spotting I recognise, not in 24 or less hours.

[ChairmanFester]

What is this spotting? I moved the light back (suspected 15" was too close) before water/nutes and don't over or under water. Nutes are the same. It was doing fantastic but now I'm looking all over for contamination or something. Definitely not bugs of any stripe. Weird theory but like... at the end of a water filter's life (fridge) does it shit out filter parts with something in it?

 

[ChairmanFester]

24 hours earlier... all I did was it's on schedule 3 day dry then water/nutes.

 

[voltage]

Looks like a ph issue.
But just a guess. Lets get more info.

How old is the plant?
What is the medium? What water and nutes are you using?
Also post a pic of the schedule

 

[ChairmanFester]

17 days

Dollar store totally plain cheap topsoil. Medium pearlite mix. Cup worm castings. Half cup bone meal. Approx 4 gallon. PH is 6.1 or 6. probably above 6 by the small hairs anyway.
4 gallons of total medium
Nothing until second leaves then A+B House and Garden liquid (1ml each to the quart or 4ml to the gallon). 3 days dry and then water/nutes on the 4th.
18/6 light cycle 100w equiv LED wide spectrum, 15" distance minimum
Good drainage...
idk what else...
no bugs or critters...

 

[ChairmanFester]

That curling relaxed and the spots haven't change like it was contact with something. But that's not possible, feed and water mix is poured into hand fluffed soil top. Nothing gets sprayed on it and again no bugs. Another nute test shows 3-1-1.5 spot on. One high veg leaf looks shot, would you trim it off?

 

[Ninjadogma]

Stop playing around with your water pH and you'll stop seeing those spots.

 

[ChairmanFester]

I haven't played with water pH, I use water from the fridge system which is filtered and tests perfect 7. It's been tested by mail order lab and its a little up in silicates but not much of anything without filters.

 

[ChairmanFester]

I might do a super light baking soda in water treatment next feed/water day. I just want a smudge more royal green in the tests to get it up to 6.5 and I think that's the gentle way to do it.

 

[Galgrows]

Looks like it's trying to flower what is it?

 

[Ninjadogma]

Good to know. The spots are a classic sign of pH fluctuation. Maybe try not using the filtered water because you don't know what minerals it's taking out and what buffers it's leaving in.

 

[voltage]

Is this an experiment?

 

[ChairmanFester]

Experiment, no why? The pH evidently needs to come up between .3 and .4 to hit mid 6. You may be right about the water, I'll change to tap and see before adding baking soda but there is already bone meal in the soil so I'm surprised I have to change anything. It's not flowering, there are single pistils but very few and there is new branching.
AutoBomb (North atlantic auto) says 10w but yeah lol. No expect weeks more veg. Any preemie pistil hairs are not really flowering. I mean over all good stems, good leaf. Spots are not spreading or changing.

 

[ChairmanFester]

Looks like it's trying to flower what is it?

What looks like pistil and hair is new leaf.

 

[Ninjadogma]

Experiment, no why? The pH evidently needs to come up between .3 and .4 to hit mid 6. You may be right about the water, I'll change to tap and see before adding baking soda but there is already bone meal in the soil so I'm surprised I have to change anything. It's not flowering, there are single pistils but very few and there is new branching.
AutoBomb (North atlantic auto) says 10w but yeah lol. No expect weeks more veg. Any preemie pistil hairs are not really flowering. I mean over all good stems, good leaf. Spots are not spreading or changing.

The spots shouldn't spread unless/until they get another watering with funky pH. It happened within hours and the damage was done. Here's a shot I took today from my own garden. Look familiar? It's pH damage. I screwed something up, it happens when you're mixing things and not paying attention to what you're doing or you get distracted or interrupted. It's no big deal... well it is if you don't know what you're looking at or what you did but when you know these things, you'll breathe easier and what I'm trying to tell you is you are in all probability doing much more harm to your plant in the long run by even messing around with the pH. If you want to play with the pH, then do a hydro or coco grow. And I'm betting a lot of the issues people run into is a lot of those pH pens are completely unreliable. I double check my readings with red phenol because digital devices can fail or give a bad reading, but chemistry is always reliable.

 

[Tmick]

Soil grows want 6.4-6.6 ph water and any nutes going in.
This chart shows nute availability/uptake by ph range.

 

[Ninjadogma]

The spots shouldn't spread unless/until they get another watering with funky pH. It happened within hours and the damage was done. Here's a shot I took today from my own garden. Look familiar? It's pH damage. I screwed something up, it happens when you're mixing things and not paying attention to what you're doing or you get distracted or interrupted. It's no big deal... well it is if you don't know what you're looking at or what you did but when you know these things, you'll breathe easier and what I'm trying to tell you is you are in all probability doing much more harm to your plant in the long run by even messing around with the pH. If you want to play with the pH, then do a hydro or coco grow. And I'm betting a lot of the issues people run into is a lot of those pH pens are completely unreliable. I double check my readings with red phenol because digital devices can fail or give a bad reading, but chemistry is always reliable.

Follow up comment to this, my young plants all get straight tap and I really only introduce adjusting if I have a particular plant being fickle with uptake. I've got a Durban that's extremely fickle and a Banana OG that doesn't give a shit about pH.

Soil grows want 6.4-6.6 ph water and any nutes going in.
This chart shows nute availability/uptake by ph range.

View attachment 2451296

This is why a cal mag deficiency is usually affiliated with low pH conditions and iron deficiency is often affiliated with high pH. So what do we do to fix it? We add more cal mag and iron like dumbasses. But this probably isn't the best conversation to have when I'm trying to convince another grower to leave their pH alone, lol.

 

[ChairmanFester]

I added cal mag and iron with bone meal like a dumbass. Probably yo-yo'ed pH in a short time frame, got shock damage and well, hope since we're firmly in veg TATP producing leaf matter is replaced/compensated for. Still nothing spreading.
I use a 4 vial powder and soil titrate kit, not a pen or meter or strip.
In fact this was a week ago since the soil batch accidentally got less than recommended so I stirred bone meal into the top of the soil. And can we conclude this will cause short term shock spotting like that and case closed Dr. House?

 

[Ninjadogma]

I added cal mag and iron with bone meal like a dumbass. Probably yo-yo'ed pH in a short time frame, got shock damage and well, hope since we're firmly in veg TATP producing leaf matter is replaced/compensated for. Still nothing spreading.
I use a 4 vial powder and soil titrate kit, not a pen or meter or strip.
In fact this was a week ago since the soil batch accidentally got less than recommended so I stirred bone meal into the top of the soil. And can we conclude this will cause short term shock spotting like that and case closed Dr. House?View attachment 2451377

LOL

 

[ChairmanFester]

Fun fact: cells make ATP as a primary energy product. TATP is a not very fun explosive favored by Jihadis gone to Whatever their heaven is called. If plants made TATP things would be quite lively in the forest. My mistake.

She's recovering. Still kicking well over an inch a day growing and getting real branching action.

 

[voltage]

Experiment, no why? The pH evidently needs to come up between .3 and .4 to hit mid 6. You may be right about the water, I'll change to tap and see before adding baking soda but there is already bone meal in the soil so I'm surprised I have to change anything. It's not flowering, there are single pistils but very few and there is new branching.
AutoBomb (North atlantic auto) says 10w but yeah lol. No expect weeks more veg. Any preemie pistil hairs are not really flowering. I mean over all good stems, good leaf. Spots are not spreading or changing.

Because you seem to be playing with soil. A bag of garden soil has buffers and nutrients etc... Also u said its 17 days old (from when?) and its an auto (auto bomb)? Which light are you using?

Is your goal to grow awesome plants with big yield? Theres ppl here that do that regularly with autos.

Its a plant you have to sit back and let it grow. Patience and routine.
When problems do arise its easy to get excited and make uninformed quick decisions.
Just my 2 cents.