need help plants acting as if it has a sulfur deficiency

No clue why . ph is fine, 1000 watt metal halide and 300 watt t5 in one tent with 19 plants and a t5 300watt in a smaller tent all vegging rn till I start the cycle. All clones of what I just previously grew, it all came out great they're loui 13 og kush crossed with a cali bud called calizahr, I have a Calizahr dominant phenotype and an OG dominant pheno. And a few purple kush f2 from cali all from seed I got from the Denver cannabis cup (im from boston tho) and a cupl white widow extremes from amsterdamnmarijuanaseeds.com that I bred my self with a (lambs breath X purple rhino) it happened to the last run too but I fixed it somehow idr how so some input would be apreciated I have all the nutrients I need and I usually know what to do but this one I'm unsure about. Maybe the temp change? When lights are on its 72 degrees f and at night drops to about 60 maybe 55. Oh yea and foxfarm ocean forest soil some of it reused from the last run (flushed though of course to take out flowering nutes) and I use root organics nutrients. I don't follow a schedule though, I usually know what it wants and give according to what the plant needs to avoid over feeding. I do have some magnesium sulfate too if that helps. But yea as you can see yellowing starts from the back of the leaf to the tip. I'll upload pics of them and the nug I got from them the last run so you can see

I'm not sure what your issue is, the yellowing at the new growth looks cool but could be the start of low boron? But honestly I don't know. My hurricane had the same thing, a guy on this forum told me to add some cal-mag and it all turned green, Also I never understand how people can get such low temps in there grow area's I own a space heater that will come on when the temps get to where I set it, only 28 US dollars.

To know for sure, soil test. Appears minor but who knows with a soil that was used, nuted,and leached? Cool nights can bring out some nice colors even when nutes are correct. So if that is different than last time it could be so simple as that.

My room is in a basement and my grow room is in my room, so gets cold here in ma. I did let it get cool at night for a period of time while I had plants flowering for the simple reason of what bug eye said to bring out the chemical anthocyanin which my plants are high in. (Purple colors and such) so you think the flushed reused soil could possibly be low on micronutrients and core nutrients? And I do have a space heater that I use , now that I don't have flowering plants so for about a week, Temps have been fine. I did use calmag about 2 days ago and added nitrogen because they needed it. I just figured the vegged plants would be fine if it was a little cool at night, I mean they're supposed to grow outside in the weather so I didn't worry about it then. But as for feeding calmag, Epsom salts, and a lil bit of nitrogen about 2 days ago and boron deficiency usually doesn't happen unless the ph is off from what I've learned or if they'res a rlly low humidity? I know it's not boron though. I think eye wash will solve a boron problem aka boric acid. But this is something else

growforglory said:

My room is in a basement and my grow room is in my room, so gets cold here in ma. I did let it get cool at night for a period of time while I had plants flowering for the simple reason of what bug eye said to bring out the chemical anthocyanin which my plants are high in. (Purple colors and such) so you think the flushed reused soil could possibly be low on micronutrients and core nutrients? And I do have a space heater that I use , now that I don't have flowering plants so for about a week, Temps have been fine. I did use calmag about 2 days ago and added nitrogen because they needed it. I just figured the vegged plants would be fine if it was a little cool at night, I mean they're supposed to grow outside in the weather so I didn't worry about it then. But as for feeding calmag, Epsom salts, and a lil bit of nitrogen about 2 days ago and boron deficiency usually doesn't happen unless the ph is off from what I've learned or if they'res a rlly low humidity? I know it's not boron though. I think eye wash will solve a boron problem aka boric acid. But this is something else

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I hear ya, my intent was not in any way to come off smug, about the heat. I too let mine get cooler at night during the last few weeks of flower. I guess all I was getting at is if someone is concernd about temps, that should be easily fixed. Peace plants look nice and so do the harvested buds

when looking at any plant to determine what micro or macro def it may be is look where it starts macro starts from bottom to middle of plant works its way up Micro starts at the top and works its way down there your answer cannot get any easier then that

Doomhammer69 said:

I hear ya, my intent was not in any way to come off smug, about the heat. I too let mine get cooler at night during the last few weeks of flower. I guess all I was getting at is if someone is concernd about temps, that should be easily fixed. Peace plants look nice and so do the harvested buds

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What heater do you use?

BiG PuFFer said:

What heater do you use?

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Brand name is Kenmore. I bought it at Target in Colorado. its just a typical space heater. This one has a button on the bottom so if it tips it will shut off. I keeps a 15x20 room snug and warm.

So I'm kind of thinking they're may be too much light. I think what fixed them last run is the fact they were under a powerful led in veg when the same symptoms began, then when I switched to flower I transitioned slowly to an hps so they wouldn't be shocked, and after awhile in flower the symptoms went away. So im thinking it may be a light thing causing what looks like a deficiency. Im gonna turn the light down a little and set it a little higher up and see what happens

Doomhammer69 said:

I hear ya, my intent was not in any way to come off smug, about the heat. I too let mine get cooler at night during the last few weeks of flower. I guess all I was getting at is if someone is concernd about temps, that should be easily fixed. Peace plants look nice and so do the harvested buds

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YA i didn't take it like that, Thanks though they do look nice, great genetics.

Doomhammer69 said:

I'm not sure what your issue is, the yellowing at the new growth looks cool but could be the start of low boron? But honestly I don't know. My hurricane had the same thing, a guy on this forum told me to add some cal-mag and it all turned green, Also I never understand how people can get such low temps in there grow area's I own a space heater that will come on when the temps get to where I set it, only 28 US dollars.

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I do the same thing I set mine in the room and it comes on when its cool so it never get below 75 it was 16 bucks at the dollar store but uses 750w when it turns on that's the only down fall

Looks like "Fe" deficiencies to me.

cap master said:

I do the same thing I set mine in the room and it comes on when its cool so it never get below 75 it was 16 bucks at the dollar store but uses 750w when it turns on that's the only down fall

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I didn't realize I used so much power, I'm going to check mine now.
The grow is in a down stairs bedroom, Its the coolest room in the house. Even with the main heat on it is always chilly down there. The entire down stairs is all finished. Man cave, entertainment room where we keep our surround sound and Tv, 2 bedrooms and a bath. they all stay warm, except that one room, its on a outside corner

yeah but I have my veg cab in my reptile room and they run heat lamps to stay warm so its not on 24/7 here and if I don't have it the additions not finished or properly insulated so I have no choice but to use one. it may e cheaper for u to T off some existing heat ducting being in a basement if that's an available option.

So I hope anyone having these symptoms learns from this but yes it was too much light, I turned the lights down a cupl hundred watts and gave a cupl plants (hungry ones) some p and k they're all fine now. Bounced right back the day after so too much light does cause this sometimes thank you all for helping out I apreciated it alot

Dumme said:

Looks like "Fe" deficiencies to me.

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Yes and thanks I thought the same at first because of the temp difference from lights on to lights off when I had plants flowering, and they seem to regreen when the leaf matures, which I think only iron does. Sulfur I guess should stay yellow and not recooperate? Fe is iron correct? I forget lol anyways yes I thought about it being iron deficiency but it seems as its a light problem, either too much light, or a phosphorus potassium problem not letting it absorb the light it has. I fixed them though they're all fine now some co2 probably help it absorb the light too correct?

Dude...you are EXTREMELY righteous for coming back and closing the loop on this. Sooo often that never happens. Thanks, I learned something today.

orbo said:

Dude...you are EXTREMELY righteous for coming back and closing the loop on this. Sooo often that never happens. Thanks, I learned something today.

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Haha. Yea np I just got stumped on this one and since I found the answer thought I'd share, Cuz the answer is nowhere on the Internet I've looked lol. Deficiencies are kind of like a big math problem you have to solve. And your answer is usually in the leaves stems and or roots. And Some times one deficiency causes another which can get confusing. High light intensity can mimic a sulfur problem though that's the answer to this one