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Yellowing of top leaves in mid flower after smooth sailing entire grow?

IndicaDogo

IndicaDogo

Active Member
I've got a question! <br />
So have 1 Lemon Skunk sativa in the end of flower, roughly week 8-9. She has been great until late about a week or so ago. <br />
She started showing some yellowing of the top leaves and some middle leaves.<br />
Now a few top leaves are showing some purple too.<br />
She was drinking 3/4 strength mix at 980ish ppm. <br />
But since the yellowing of leaves started. She has stopped taking up nutes and just drinking water. <br />
My ph has been stable just like it usually is. 6.5-5.6. I don't have ph problems. <br />
Could it maybe be magnesium deficiency? <br />
<br />
Dwc, 5g of water. <br />
Botanicare KIND nutes<br />
Ph 5.6-6.5<br />
Under cob led lights <br />
75-90° 50% rh<br />
<br />
Not sure what the problem is. There is no reason I can see that there should be a problem. <br />
<br />
<br />
<br />
<br />
Thanks for looking!
 
SouthCross

SouthCross

Well-Known Member
Weird looking plant. If it wasn't for the last picture showing a full fan leaf. You could question if it was cannabis at all.

Since its DWC, any chance you can take a picture of the roots? It appears to be rotting from the inside out. I'd consider root rot a possible issue.
 
IndicaDogo

IndicaDogo

Active Member
15012512809891067225896.jpg I'll post a pic of the roots. They seem fine though. No funky smell or slime we use Hydroguard and Orca for our resivour.

I was thinking a ph problem possibly seeing as how the tops are yellowing and turning purple. I thought magnesium and or calcium caused by improper ph.
But I haven't actually seen any ph problems at.
I start my water changes with ph at 6.2 and let it drift down from there.
She has just recently started showing these signs.
 
roseypeach

roseypeach

Well-Known Member
As far as the yellowing goes, that's bleaching from the lights being too close. Your roots look great though!
 
IndicaDogo

IndicaDogo

Active Member
Buba Blend said:
Funky leaves. Did you re-veg and flower a plant that once flowered? Kinda looks like that
Click to expand...
Lol well kinda a bit.
See I'm in the desert southwest and it got to be over 100° for several weeks here.
The girls were already in flower and had developed small buds. I had the lights on for 12 hours during daytime but it was just to hot in the tent.
So I switched to 12/12 with the lights on at night and off during the day. To try and keep the temps down during the hottest part of the day.
But doin this pissed off the ladies in the tent and started a kinda reveg for a bit.
This didn't affect the other plant we had in there but it really made this girl mad!
But it has been alost 4 weeks since the light flip. I don't think that's what is making her stressed at this point.
She recovered great and continued stacking buds and fattening up.

This problem started 4 to 5 days ago.
 
IndicaDogo

IndicaDogo

Active Member
roseypeach said:
As far as the yellowing goes, that's bleaching from the lights being too close. Your roots look great though!
Click to expand...
It's bleaching from lights?
They've been at the same hight for weeks. Wouldn't she have shown signs long before this?

I thought it could be a ph problem but the ph has been rock solid the whole grow.

I just did a water change and am using straight water right now.

By this late in flower should I add nutes at about 1/2 strength instead of 3/4 strength like she's been getting?
Or should we just continue to flush for a few days?
 
roseypeach

roseypeach

Well-Known Member
You can't grow hydro without ferts, you need at least half strength. Especially at this stage, these last few weeks are where the plant puts on the most weight.

I said the lights were too close because the yellowing is focused on the top half rather than the middle/bottom.
 
IndicaDogo

IndicaDogo

Active Member
Awe I forgot to mention that we have been spraying her with Kapow everyday for a couple weeks now.
Started doin this because of white powdery mildew we spotted on White Rhino indica that was growing next to this girl. So as preventative maintenance we've been spraying.
We haven't seen any spots in over a week already but still spraying.
Could this be hurting her?
And if so why would it just hurt the tops?
We've been spraying the whole plant.
 

Attachments

IndicaDogo

IndicaDogo

Active Member
roseypeach said:
You can't grow hydro without ferts, you need at least half strength. Especially at this stage, these last few weeks are where the plant puts on the most weight.

I said the lights were too close because the yellowing is focused on the top half rather than the middle/bottom.
Click to expand...
Awe ok I'll raise the lights up a few inches and add nutes back before lights out.
Thanks.
 
SPLFreak808

SPLFreak808

Well-Known Member
IndicaDogo said:
I've got a question! <br />
So have 1 Lemon Skunk sativa in the end of flower, roughly week 8-9. She has been great until late about a week or so ago. <br />
She started showing some yellowing of the top leaves and some middle leaves.<br />
Now a few top leaves are showing some purple too.<br />
She was drinking 3/4 strength mix at 980ish ppm. <br />
But since the yellowing of leaves started. She has stopped taking up nutes and just drinking water. <br />
My ph has been stable just like it usually is. 6.5-5.6. I don't have ph problems. <br />
Could it maybe be magnesium deficiency? <br />
<br />
Dwc, 5g of water. <br />
Botanicare KIND nutes<br />
Ph 5.6-6.5<br />
Under cob led lights <br />
75-90° 50% rh<br />
<br />
Not sure what the problem is. There is no reason I can see that there should be a problem. <br />
<br />
<br />
<br />
<br />
Thanks for looking!
Click to expand...
So you run lights at night now yes? Im curious if that room got any windows exposed to sunlight from the other side? If so, what did you use to black it out?
 
Thai_Lights

Thai_Lights

Well-Known Member
Indicadogo- the fella that said lights were too close hit it on the money. They may have been too close in veg also without signs of burn but when you get into flower your girls become weaker and start showing symptoms. Your plants will never come back green it's too late... harvest what you can and try again next time. Good luck brother.
 
G

Gimlett

Member
IndicaDogo said:
Would there bud bleaching also though?
Click to expand...
Light burn is not always accompanied by full on bleaching. Also, the plant protects the bud above all else. There is more moisture there so it would be one of the last parts to show symptoms of heat and light stress.
 
ANC

ANC

Well-Known Member
There also seems to be purpling on the leaves and veins. I suspect a shortage of magnesium (chlorophyll looks like haemoglobin with the central iron molecule swapped for magnesium).
As well as the plant needing a tiny bit more potassium.

Potential heat or light stress as tops too.
 
roseypeach

roseypeach

Well-Known Member
Thai_Lights said:
Indicadogo- the fella that said lights were too close hit it on the money. They may have been too close in veg also without signs of burn but when you get into flower your girls become weaker and start showing symptoms. Your plants will never come back green it's too late... harvest what you can and try again next time. Good luck brother.
Click to expand...
Thanks for backing me up but FYI, no testicles here..lol

I'm all girl, just ask @cat of curiosity

:mrgreen:
ANC said:
There also seems to be purpling on the leaves and veins. I suspect a shortage of magnesium (chlorophyll looks like haemoglobin with the central iron molecule swapped for magnesium).
As well as the plant needing a tiny bit more potassium.

Potential heat or light stress as tops too.
Click to expand...
A little CalMag wouldn't hurt anything, I'm more concerned with the bud sites. For the week the OP is in, flowering nutes need to be increased (not over the top though) 3/4 strength to start, then amp up to full strength around week 11. True Sativas can take several weeks longer to mature, keep an eye on those flowers, they should look like this at harvest...

(Lemon Skunk courtesy of Leafly)
upload_2017-7-29_12-47-19.jpeg




@IndicaDogo as far as the KIND ratios go, feed as if in week 7 (8ml grow+16ml bloom) then taper off as directed after week 11. I know you stated its in the final stages of flowering but that plant needs at least another 3-4 weeks to fully mature otherwise you're going to sacrifice a lot of weight. We ran a sativa dom last year that took nearly 16 weeks to finish.
 
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