Can’t stop them yellow leaves from a’coming

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PDiddyDank

Well-Known Member
Hey all,

I’ve noticed that a few of my Hindu Skunk plants are developing yellow leaves, starting at the base of the plant and working its way up to about mid-level now. I am fairly certain it is N deficiency (tested the soil and the results came back deficient) and it fits the description for that aliment. However, I keep feeding my plants a decent amount of N fertilizer (9-6-2) and the deficiency does not seem to stop. Here are more details about my plants and feeding regiment:

Strain: Hindu Skunk
Stage: Mid-Flower. Stretch finished 3 weeks ago.
Growing space: Outdoors
Medium: Soil (FFOF/FFHF), added perlite.
Medium PH: 7
Water: Tap water
Water PH: 8
Soil Amendments: Monterey Fish & Guano (9-6-2), Top dressed Bat Guano (0-5-0), Maxicrop Kelp (0-0-17), Top Dressed EWC.
Daily Temperatures: 70F / 95-108F

It doesn’t appear to be PH lockout since the soil is at 7 and other plants that are going through stretch (or are at the same stage as the affected plants) aren’t showing as many to no yellowing their leaves.

I have doubled the Fish & Guano fertilizer (9-6-2) and still there is no slowing of the yellowing leaves. This happened to me on my last grow with Power Plant and at the same time (mid flower). From what I can ascertain, this may be normal or may not (depending on who you ask). I’m hesitant to keep up with giving the affected plants double or more N rich fertilizer during mid flower.

Interestingly enough, the plants that I let grow natural (Christmas trees) are showing many more yellow leaves compared to the manifolded plants that have almost no yellow leaves.

Im interested in your thoughts and opinions about this. Pics below for reference :-)

Overall shot of affected plant:
66EA815D-CCC6-422B-8964-3E71C46C9CB0.jpeg
Closer shot of affected plant:
9E8C9DC3-3313-4E8B-A992-EA6BB4452674.jpeg
Closeups of affected leaves:
7AD8B542-7664-4FFE-89C8-25081DEB0C05.jpeg
A372ADC8-DA0D-4126-9D3D-93D5B304C67A.jpeg
Stage of flowering:
0A1B323E-9B9E-4238-A313-B183CC40143E.jpeg
Manifolded plants seem to be doing relatively fine (no yellowing, maybe 1 leaf):
73963841-A8AC-4985-AAE5-3A973FCE823F.jpeg
 
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PDiddyDank

Well-Known Member
furnz said:
Plants look healthy and not deficient.
Yellow is from lack of light, which is normal on a plant that size and amount of foilage.
It could also be partially from moisture stress aka letting the pot get too dry.
Either way, your plants look fine and normal.
Click to expand...
Thanks for the response! :D
 
Doug Dawson

Doug Dawson

Well-Known Member
PDiddyDank said:
Hey all,

I’ve noticed that a few of my Hindu Skunk plants are developing yellow leaves, starting at the base of the plant and working its way up to about mid-level now. I am fairly certain it is N deficiency (tested the soil and the results came back deficient) and it fits the description for that aliment. However, I keep feeding my plants a decent amount of N fertilizer (9-6-2) and the deficiency does not seem to stop. Here are more details about my plants and feeding regiment:

Strain: Hindu Skunk
Stage: Mid-Flower. Stretch finished 3 weeks ago.
Growing space: Outdoors
Medium: Soil (FFOF/FFHF), added perlite.
Medium PH: 7
Water: Tap water
Water PH: 8
Soil Amendments: Monterey Fish & Guano (9-6-2), Top dressed Bat Guano (0-5-0), Maxicrop Kelp (0-0-17), Top Dressed EWC.
Daily Temperatures: 70F / 95-108F

It doesn’t appear to be PH lockout since the soil is at 7 and other plants that are going through stretch (or are at the same stage as the affected plants) aren’t showing as many to no yellowing their leaves.

I have doubled the Fish & Guano fertilizer (9-6-2) and still there is no slowing of the yellowing leaves. This happened to me on my last grow with Power Plant and at the same time (mid flower). From what I can ascertain, this may be normal or may not (depending on who you ask). I’m hesitant to keep up with giving the affected plants double or more N rich fertilizer during mid flower.

Interestingly enough, the plants that I let grow natural (Christmas trees) are showing many more yellow leaves compared to the manifolded plants that have almost no yellow leaves.

Im interested in your thoughts and opinions about this. Pics below for reference :-)

Overall shot of affected plant:
View attachment 4656539
Closer shot of affected plant:
View attachment 4656540
Closeups of affected leaves:
View attachment 4656547
View attachment 4656548
Stage of flowering:
View attachment 4656551
Manifolded plants seem to be doing relatively fine (no yellowing, maybe 1 leaf):
View attachment 4656554
Click to expand...
The first thing I would think is the yellow leaves on the bottom of that thick canopy are normal. Likely just a lack of light, I had the same thing happen to my indoor plant, the lower leaves yellowed and died from lack of light. I am not experience enough to diagnose your outdoor pest problem but it does look like you have some bugs as all the leaves seem to have white spots on them. Look into what Gemtree is stating, there is defiantly something going on with her.
 
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PDiddyDank

Well-Known Member
Thanks for the response so far. I definitely have thrips, despite several applications of neem and spinosad. I bought and released several hundred lady bugs to help out with the issue, since the spinosad doesn’t seem to be doing it and I don’t want to spray with neem this far along into flower.

I’ve had thripsfor the past 1-2 months and from my past experience, they are unavoidable growing outside and right next to a huge grass field. The yellowing of the leaves didn’t start happening until recently (last week or so), but I had this happen with my previous grow so I am inclined to agree with those that have stated it is normal during flower. That said, I still read threads where people state the plant stays green all the way through harvest, so I am left sort of scratching my head whether I really have an issue or all is proceeding as normal (shrug).
 
Rob Roy

Rob Roy

Well-Known Member
Don't know how much or how little magnesium is in your fertilizer, but I noticed an upturned leaf, which can be an indication.
I'll second the bug possibility too, not horrible, but lurking.

I think you got this though. Good luck
 
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PDiddyDank

Well-Known Member
Thanks for the response Rob Roy. I was under the impression that by using tap water, it is uncommon to encounter a cal / mag deficiency due to the tap water having adequate amounts of those minerals in it. What’s your thoughts on that?
 
Gemtree

Gemtree

Well-Known Member
PDiddyDank said:
Thanks for the response so far. I definitely have thrips, despite several applications of neem and spinosad. I bought and released several hundred lady bugs to help out with the issue, since the spinosad doesn’t seem to be doing it and I don’t want to spray with neem this far along into flower.

I’ve had thripsfor the past 1-2 months and from my past experience, they are unavoidable growing outside and right next to a huge grass field. The yellowing of the leaves didn’t start happening until recently (last week or so), but I had this happen with my previous grow so I am inclined to agree with those that have stated it is normal during flower. That said, I still read threads where people state the plant stays green all the way through harvest, so I am left sort of scratching my head whether I really have an issue or all is proceeding as normal (shrug).
Click to expand...
You use blue and yellow sticky cards? That will get most of the flyers. They are more of a pain and will stick to your buds. Not sure but BT might work
 
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PDiddyDank

Well-Known Member
Gemtree said:
You use blue and yellow sticky cards? That will get most of the flyers. They are more of a pain and will stick to your buds. Not sure but BT might work
Click to expand...
Yep, used them as well as creating my own with tangle foot. It trapped some, but created more of a nuisance with leaves and other things getting stuck to them. I’m hoping the ladybugs I released will deal with them, at least to a manageable level ;-)
 
Rob Roy

Rob Roy

Well-Known Member
PDiddyDank said:
Thanks for the response Rob Roy. I was under the impression that by using tap water, it is uncommon to encounter a cal / mag deficiency due to the tap water having adequate amounts of those minerals in it. What’s your thoughts on that?
Click to expand...
You're welcome.

I think magnesium amounts in tap water vary depending on location.
Haven't given it much thought though, mostly I've used well water.
 
Rob Roy

Rob Roy

Well-Known Member
PDiddyDank said:
Here’s a snapshot of the water quality report from my area. The water here seems to have moderate to moderate high amount of both magnesium and calcium. That would explain why the water here is so hard :wall:
Click to expand...
Took a closer look at your plants, they really don't look bad and you're on the bug thing too. I may have been off base with the magnesium possibility. Looks like the yellow leaves are mostly lower leaves. I plead temporary senility and ask forgiveness.

You do have alot of plant / foliage for a relatively small container size, so any "fixes" you go with will likely cause a response quickly. Sometimes non flowering male plants or less desireable females are good to test amendment theories on, before giving the whole flock the same medicine. We don't want the cure to be worse than the disease.
 
PioneerValleyOG

PioneerValleyOG

Well-Known Member
Leaves look yellow from plant using leafs energy, normal stuff, thrips yeah, yellow sticky boards yeah, bt is mostly for worms and paterkillers. Looks good.
 
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PDiddyDank

Well-Known Member
Rob Roy said:
Took a closer look at your plants, they really don't look bad and you're on the bug thing too. I may have been off base with the magnesium possibility. Looks like the yellow leaves are mostly lower leaves. I plead temporary senility and ask forgiveness.
Click to expand...
Actually, I can see where there may be some indication of a MG def, in terms of the chlorosis between the veins of the leaf and some browning along the margins. I think what is missing though are brown spots and that the whole leaf ends up with chlorosis rather uniformly in the end.

On a related note, I was reading this great article on MG and I thought this was rather interesting:

“Magnesium uptake is also affected by the presence of other elements. In general, a nutrient balance is obtained by targeting a 4:2:1 ratio of potassium (K) to calcium (Ca) and Mg. This helps avoid antagonisms among these elements.”

So despite having sufficient Ca and Mg, you can still end up with a deficiency if there’s an imbalance between those elements. It may be common knowledge, but I found that interesting and useful. Check out the article I quoted below; it’s a good read!


Cheers! :leaf:
 
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PDiddyDank

Well-Known Member
twentyeight.threefive said:
Why are you using water at pH of 8?
Click to expand...
Thats the PH of my tap water (shrug). My plants need water so often, that manually adjusting the PH down is too labor intensive and I don’t have the $$ or ambition to buy/make an automated system. From what I’ve read, the soil acts as a buffer for the high PH and since I tested the soil (7), I think I’m good with my PH.
 
twentyeight.threefive

twentyeight.threefive

Well-Known Member
PDiddyDank said:
Thats the PH of my tap water (shrug). My plants need water so often, that manually adjusting the PH down is too labor intensive and I don’t have the $$ or ambition to buy/make an automated system. From what I’ve read, the soil acts as a buffer for the high PH and since I tested the soil (7), I think I’m good with my PH.
Click to expand...
You're definitely on the high side of the pH range for soil. Hope things continue to go well. Good luck.
 
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