Deficiencies
- Thread starter phiGweed
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Emilya Green
Well-Known Member
I am going by the tip burns, the deep dark green of some of your affected leaves and the symptom itself. It looks like you have correctly diagnosed it to be a magnesium deficiency, and you are giving extra... and I also see what looks like a slight Iron deficiency too... so what gives?
According to Mulder's chart of mineral interactions we can see that too much Ca or K could lock out Magnesium. I think you are giving too much nutrient, and that excess NP and K is causing a couple of things to happen. The excess P is locking out some of the Iron. The excess K is blocking Magnesium availability. The excess N is causing the unhealthy deep dark green and the tip burn.
We also haven't investigated the pH you adjust your fluids to or what medium you are working in, but Mg unavailability is oftentimes caused by having the pH way out of the range, but your plants don't have the multiple symptoms that usually would be seen with that.
I just think that with your particular lighting and size of plants, you are a bit over the amount of nutrient you need. Less is more sometimes... try that before going nuts going down other rabbit holes.
According to Mulder's chart of mineral interactions we can see that too much Ca or K could lock out Magnesium. I think you are giving too much nutrient, and that excess NP and K is causing a couple of things to happen. The excess P is locking out some of the Iron. The excess K is blocking Magnesium availability. The excess N is causing the unhealthy deep dark green and the tip burn.
We also haven't investigated the pH you adjust your fluids to or what medium you are working in, but Mg unavailability is oftentimes caused by having the pH way out of the range, but your plants don't have the multiple symptoms that usually would be seen with that.
I just think that with your particular lighting and size of plants, you are a bit over the amount of nutrient you need. Less is more sometimes... try that before going nuts going down other rabbit holes.
- Thread starter
- #3
Thank you so much ! I’ve been making sure the pH stays around 6.5. The next watering, I will give her only water pH’d at 6.5 to see if it goes away! Also I’m growing in FFOFI am going by the tip burns, the deep dark green of some of your affected leaves and the symptom itself. It looks like you have correctly diagnosed it to be a magnesium deficiency, and you are giving extra... and I also see what looks like a slight Iron deficiency too... so what gives?
According to Mulder's chart of mineral interactions we can see that too much Ca or K could lock out Magnesium. I think you are giving too much nutrient, and that excess NP and K is causing a couple of things to happen. The excess P is locking out some of the Iron. The excess K is blocking Magnesium availability. The excess N is causing the unhealthy deep dark green and the tip burn.
We also haven't investigated the pH you adjust your fluids to or what medium you are working in, but Mg unavailability is oftentimes caused by having the pH way out of the range, but your plants don't have the multiple symptoms that usually would be seen with that.
I just think that with your particular lighting and size of plants, you are a bit over the amount of nutrient you need. Less is more sometimes... try that before going nuts going down other rabbit holes.
remember some of that stuff is normal from time to time - if it issues are spotty (different places. different heights) keep a eye out if thinks increase consider light intensity - if spots are low could be nutrient "splash" slopy feeding with tip bending two causes: nutrients and enviromental issues No worries at present !!!
Emilya Green
Well-Known Member
especially since you are in such a strongly upwardly drifting soil as in FFOF, I strongly recommend you to stop coming in at the exact middle of the soil pH range and from now on come in at the low end, at 6.2 pH. Your soil will quickly drift the pH up to the 6.5 that you have been adjusting to, and beyond, but by doing it this way you will also hit the lower part of the range, and you will pick up more magnesium by doing so.
Enr0n
Well-Known Member
Thanks Emilya I had at least Fe identified.
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- #7
This advice is greatly appreciated! Never thought about lowering my pH! Will definitely be doing this for the next watering!
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- #8
Thank you! I do sometimes splash water on bottom leaves so I definitely understand you! I have a few on Higher leaves as well though. I’m using a spider farmer sf4000 at 50% . Some have advised me to brighten the light to 75% but tacoing usually occurs right afterwards. I plan on raising the light a little higher but eventually I won’t be able to go any higher. (Hopefully my trellis helps) I do want to get the most out of the light and flower without burning her though.
Emilya Green
Well-Known Member
by tacoing, do you mean the normal rising up and praying to the light? Sometimes this is misdiagnosed too. You need a $35 light meter so you know how many LUX you are providing at the top of the canopy.
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- #10
I was informed either heat stress or nitrogen toxicity. Please let me know if this is incorrect because I would love to strengthen the light lol. I’ve looked into meters. Still not 100% sure on how to work them. I had an app on phone and was completely lost:
I took these a few days ago when I brought the light from 40-75% then settled on raising it to 50%
Emilya Green
Well-Known Member
that doesn't look like light/heat stress to me... it looks like the droopiness from overwatering, with the leaves trying hard to increase surface area to throw off some of that water.I was informed either heat stress or nitrogen toxicity. Please let me know if this is incorrect because I would love to strengthen the light lol. I’ve looked into meters. Still not 100% sure on how to work them. I had an app on phone and was completely lost:
I took these a few days ago when I brought the light from 40-75% then settled on raising it to 50%
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- #12
Emilya Green
Well-Known Member
please read my watering article about how to properly water and go COMPLETELY dry between waterings. You will love what this does for your plants!
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- #14
Sounds good to me! Thank you!!
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- #15
Hey! So I’ve had the light turned up to 60% (from 50%) would you say this is normal as well?
Emilya Green
Well-Known Member
looks like they are almost happy... let them dry out a little more and watch them reach for that light
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- #17
Love the advice!! Thank you!!
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- #18
Hey everyone!! I just wanted to give an update and say thank you to everyone that has helped me along this journey! Im in week 6 and and loving everything! Not sure what to expect out of weight but Thank you again! I’ve learned soooo much! Lost some plants due to herming but i now know what my issue was. This strain takes about 8-9 weeks to flower so I’m hoping these last few weeks are just as great! STAY AWESOME GUYS!!
Emilya Green
Well-Known Member
love the fall colors! 
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- #20
Thank you! You were A LOT of help!!!love the fall colors!
