Help Please?!?! Just cant figure out which nutrient Im deficient in...

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willhmx04

Well-Known Member
Can anyone confirm that this is a Mg deficiency? Maybe Potassium(K)? Now Im thinking it could be Sulphur?


Ive looked at pictures of all the different deficiencies abd have Jorges "Grow Bible" but I cant make an accurate comparison. When I start thinking it looks like one, then it starts to resemble another. Im stressed to the max!

The plant is 7 weeks old from germination. Ive given it Fox Farm Grow Big and Big Bloom (in small doses- Never went over 200ppm) twice in the last 3 weeks.
I checked the run-off of the water and the pH is 6.3 and at 237ppm. The water ive given it has been around 6.5 to 6.8, depending on how much my meter has drifted. It just started yellowing about a 8-9 days ago. In addition to the yellow leaves they have also died with copper color spots right before they drop - see pics. The upper part of the stem started getting purple lines. Overall, its not growing at full speed as it should. Thanks in advance for advice!
The whole plant is a light green from bottom to the top!

Also, this morning I mixed 3/4 tsp. of cal-mag plusin a gallon and fed the plants.
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painkillerman

Active Member
well he i go again and i cant believe it was missed im in no way trying to be disrespecfull ...... but the problem is the anwser WOW UR INPUT IS 200 N 237 OUT ur feeding to much and plant cant coup rince till input/output match then keep eye on stuff guy runoff should always be lower =plant eating people (lockout/ph problem due unbalanced CF (controlled fluids in cell walls caused by rapid change in both salts and ec/ppm or ur not get enough run off every time u water in basic terms lol also adding anything in ur nutes is LAST resort u have to check ur basics this i cant stress enough guy........
 
hornedfrog2000

hornedfrog2000

Well-Known Member
yeah, leaves look burned. the top yellow looks normal though. purple stems seems to always be brought up, but i think its totally blown out of proportion. most always there will be some purple stems
 
*BUDS

*BUDS

Well-Known Member
Im guessing heat stress or light bleaching, getting a little warm in the grow room now bro?
 
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willhmx04

Well-Known Member
hornedfrog2000 said:
yeah, leaves look burned. the top yellow looks normal though. purple stems seems to always be brought up, but i think its totally blown out of proportion. most always there will be some purple stems
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Ive seen this "purple stem" conversation many times. I hear its the strain or its genetic dont trip. However, for me Ive never had purple stems unless my plant was starting to get sick like right now. When the "purple stem" comes the plant gets weak up top like right now. This morning I go in the tent and one of my top shoots had completely fell over, mind you its only 2.5 inches long. It should be able to support itself. This purple stem thing gets swept under the rug far to often, but for me, when I see purple stems its a clear sign something is going wrong. The healthiest plants ive grown in the past had no purple stems. Of course I completely understand it could be genetics but not mine. I have soooo much riding on this crop and its crucial I get a good harvest. Im really considering FLUSHING today..
 
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willhmx04

Well-Known Member
painkillerman said:
well he i go again and i cant believe it was missed im in no way trying to be disrespecfull ...... but the problem is the anwser WOW UR INPUT IS 200 N 237 OUT ur feeding to much and plant cant coup rince till input/output match then keep eye on stuff guy runoff should always be lower =plant eating people (lockout/ph problem due unbalanced CF (controlled fluids in cell walls caused by rapid change in both salts and ec/ppm or ur not get enough run off every time u water in basic terms lol also adding anything in ur nutes is LAST resort u have to check ur basics this i cant stress enough guy........
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Thank you Thank you... You really know what your talking about. Now, I can take the info you mentioned " UR INPUT IS 200 N 237 OUT ur feeding to much and plant cant coup rince till input/output match then keep eye on stuff guy runoff should always be lower" and use this to sharpen my skills. This is something I havent read or heard from anyone. Again Thank You. I knew it had to be nute lock out it was my gut feeling, even though I didnt mention it in the starter. In the past when something like this happened I ALWAYS flushed but I took a 3 year break and forgot many things. Im back on track now... When all else fails, FLUSH!
 
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willhmx04

Well-Known Member
crazyhazey said:
purple stems means potash deficiency to me. nutes?
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I fed the plants with FF Grow Big and Big Bloom(1/4 dosage each) around the beginning of march, March 6th? Then I went on this cruise for 4 days while my dad watched everything. When I got back a couple plants top leaves looked fringed between the margins almost bulky and on page 256 of the grow bible(bottom right picture) is how they looked. I kept thinking it was magnesium, however, what i read never mentioned purple stems. Phosphorus did mention purple stems but the picture of the leaves of phosphorus deficiency didnt match my dying foliage. Im sure I need to flush. i need to get these things healthy by the end of the month so i can flower.
 
crazyhazey

crazyhazey

Well-Known Member
willhmx04 said:
I fed the plants with FF Grow Big and Big Bloom(1/4 dosage each) around the beginning of march, March 6th? Then I went on this cruise for 4 days while my dad watched everything. When I got back a couple plants top leaves looked fringed between the margins almost bulky and on page 256 of the grow bible(bottom right picture) is how they looked. I kept thinking it was magnesium, however, what i read never mentioned purple stems. Phosphorus did mention purple stems but the picture of the leaves of phosphorus deficiency didnt match my dying foliage. Im sure I need to flush. i need to get these things healthy by the end of the month so i can flower.
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maybe up your dose of big bloom. if you can, buy bat guano from a plant nursery or the hydro store. you can flush with that if your due for a flush, wont burn them but still feeds them. put it on your top soil or in your water, and shake it up. it may alter your pH so wait for it to settle then take the pH.
 
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willhmx04

Well-Known Member
crazyhazey said:
maybe up your dose of big bloom. if you can, buy bat guano from a plant nursery or the hydro store. you can flush with that if your due for a flush, wont burn them but still feeds them. put it on your top soil or in your water, and shake it up. it may alter your pH so wait for it to settle then take the pH.
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You know I never mentioned this before, but, I mixed 3 red solo cups of fox farm original planting mix with Bat guano and Earthworm castings into probably 2.5 gallons of Sunshine Natural & Organic planting mix (soilless). You think the addition of FF fertilizers into this mix could have caused it to get toxic? Thanks
 
crazyhazey

crazyhazey

Well-Known Member
willhmx04 said:
You know I never mentioned this before, but, I mixed 3 red solo cups of fox farm original planting mix with Bat guano and Earthworm castings into probably 2.5 gallons of Sunshine Natural & Organic planting mix (soilless). You think the addition of FF fertilizers into this mix could have caused it to get toxic? Thanks
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that might be a bit hot, but all those nutes are organic. id say add a handfull of that soil to every gallon of water and use it as feed.
 
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willhmx04

Well-Known Member
crazyhazey said:
that might be a bit hot, but all those nutes are organic. id say add a handfull of that soil to every gallon of water and use it as feed.
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Check it out, I was having a problem with my Hanna pH meter drifting many points and frequently. I found myself recalibrating every week. :( I m pretty sure when i checked my runoff and it was at 6.3, it had to be wrong. So I regressed to the old days and went and bought the pH drop tester. I tested my runoff and it says its below 6.0 by the color chart. Im guessing this is an even BIGGER problem than I thought. Im flushing the plant right now. So I have a question: Is the proper, and maybe only way, to raise the soils pH is to give it water at or above 7.0 until its in the desired range? Thanks bro
 
crazyhazey

crazyhazey

Well-Known Member
willhmx04 said:
Check it out, I was having a problem with my Hanna pH meter drifting many points and frequently. I found myself recalibrating every week. :( I m pretty sure when i checked my runoff and it was at 6.3, it had to be wrong. So I regressed to the old days and went and bought the pH drop tester. I tested my runoff and it says its below 6.0 by the color chart. Im guessing this is an even BIGGER problem than I thought. Im flushing the plant right now. So I have a question: Is the proper, and maybe only way, to raise the soils pH is to give it water at or above 7.0 until its in the desired range? Thanks bro
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water with about 6.8 and buy dolomite lime for you soil, this will raise your pH.
 
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willhmx04

Well-Known Member
Went earlier and got some pulverized lime. top dressed with 3 tbls. in each container at the end of the flush. I hope to see positive results next few days. thanks for all the knowledgeable info!
 
crazyhazey

crazyhazey

Well-Known Member
willhmx04 said:
Went earlier and got some pulverized lime. top dressed with 3 tbls. in each container at the end of the flush. I hope to see positive results next few days. thanks for all the knowledgeable info!
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you will most likely see some changes within 6 hours or so, maybe less. look for new node growth and check if any of your leaves start to perk up. its very essential to let them air out, poke holes in the top soil so the roots can breath.
 
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