HELP! LSD Leaves yellowing, first week of flower **PICS**

redeyejedi01

redeyejedi01

Member

I have two eight week old plants that I just moved from a 200w LED veg tent to my 600w LED flower tent, one is Girl Scout Cookies and the other, the one having the problems, is LSD. They are now one week into flower and I believe the issue did start after moving to flower tent, but the GSC is not having any problems and is very happy. Can anyone diagnose the issue by looking at the leaves? I'm not very good at identifying the problems from the charts. I have pictures attached and will fill out the questions below:


How long has this problem been going on? About a week
What STRAIN are you growing? LSD
What was the establishing technique? (seed or clone?) Seed
What is the age of your plants? 8-9 weeks, 1 week into flower
How long have they been in the soil mixture they are in now? Since seed, 5 gal aeropots
Were they in the same mixture when they were seedlings/smaller plant? If not, what mixture were they in before? Same mixture
How Tall are the plants? 2ft 8in
What PHASE (seedling, vegetative or flower) are the plants in? Flower
What Technique are you using? (SOG, SCROG etc) Topped during veg, four colas
What size pots are you using? (Include how many subjects to pot) 5gal
What substrate/medium are you using? What brand of soil mixture are you using?(percentage of perlite, vermiculite...etc?) FoxFarm OceanForest
What brand Nutrient's are you using? Using Doggett & Simpson 3-stage fert and SNS 604B Flower Growth Supp
How much of each nutrient are you using with how much water? *Knowing the brand is very helpful* SNS 604B with every water, fert every 1 1/2 weeks - 2 weeks
How often are you feeding? fert every 1 1/2 weeks - 2 weeks
If flowering, when did you switch over to using Bloom nutrients? After they went in flower tent
What is the TDS/EC/PPM of your nutrients used? Unknown
What is the pH of the "RUN-OFF"? No run-off to test at the moment
How often are you testing pH/ppm/EC/TDS? Test soil pH often
What method of pH test was administered? Using Strips? pH pen? pH and moisture probe
How often are you watering? 2-3 days
When was your last feeding and how often are you feeding? Last feeding was on schedule, about 2-3 days after move to flower
What size bulb are you using? LEDs, 2 200w and 2 100w in flower tent, 2 100w in veg tent
How old is your bulbs? Couple months
What is the distance to the canopy? 15inches
What is your RH Factor? (Relative Humidity) currently 61.2, fluctuates between 40-60
What is the canopy temperature? 78.8
What is the Day/Night Temp? (Include fluctuation range) 78-80
What is the current Air Flow? (cfm etc.) 120cfm exhaust fan, mini fan inside of tent for additional air ciruclation
Tell us about your ventilation, intake exhaust and when its running and not running ? exhaust fan only, controlled by a digital environmental controller
Is the fan blowing directly at plants? Yes
Is the grow substrate constantly wet or moist? Stays wet until dry
Is your water HARD or SOFT? Probably hard
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water? Filtered tap
If using tap water, what is the ppm/EC/TDS of the water right out of the tap?(Only if you have a tds pen) Unknown
If using RO,Distilled,mineral water, what is the ppm/EC/TDS without any additives?(Only if you have a tds pen)
Are you using water from a water softener? No
Has plant been recently pruned, cloned or pinched? Took off some bottom-dwelling fan leaves
Have any pest chemicals been used? If so what and when? No
Are plant's infected with pest's? No
 

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L

leobud

Active Member
I'm no authority by any means, but I have had the same issue during the same time periods, bumping up to a more powerful LED during flower. Everything I've seen (in my own case) has boiled down to two potential culprits:
1: You may need to continue using your veg nutes for a few days after switching to flower. Something about the plant not being quite ready to accept the drop in N that accompanies a switch to bloom nutes.
2: You may have a Cal-Mag/Iron deficiency. Higher powered LED's seem to cause this much more frequently. (Have a look at chelated Iron)

I use a much less forgiving DWC method which would require me to flush immediately, and lightly re-introduce the nutrient solution that I thought would remedy the problem.
Hope that helps
 
SpicySativa

SpicySativa

Well-Known Member
Trying to read that wall 'o text was making me go crosseyed, but I'll see if I can help.

-Are the affected leaves near the top, closest to the light? If so, I would say you may be dealing with some light bleaching from the abrupt light increase from 200 to 600 watts. Try raising the light up a bit and see if the new growth looks healthy.

- If the affected leaves are nearer the bottom of the plant, you may just have a bit of a magnesium deficiency. If it's a minor Mg deficiency, a foliar spray of dilute Epsom salts will fix that right up.

Can you post a picture of the whole plant, preferably in it's spot in the grow area? That will help with diagnosing the issue.

Cheers,

~SpicySativa
 
redeyejedi01

redeyejedi01

Member
SpicySativa said:
Trying to read that wall 'o text was making me go crosseyed, but I'll see if I can help.

-Are the affected leaves near the top, closest to the light? If so, I would say you may be dealing with some light bleaching from the abrupt light increase from 200 to 600 watts. Try raising the light up a bit and see if the new growth looks healthy.

- If the affected leaves are nearer the bottom of the plant, you may just have a bit of a magnesium deficiency. If it's a minor Mg deficiency, a foliar spray of dilute Epsom salts will fix that right up.

Can you post a picture of the whole plant, preferably in it's spot in the grow area? That will help with diagnosing the issue.

Cheers,

~SpicySativa
Click to expand...

Spicy,

It's soley the leaves at the top. I was thinking it mightve been light bleaching, but it doesn't look quite like it to me, from what I've looked at, but I'm by no means an expert. To me, from the leaf charts I've looked at, it resembles Mag deficiency, but I know mag def typically shows on the lower leaves. Even still, tho, it looks like the mag deficiency. I've gone a head and flushed the LSD and also bought some Cal-Mag. Once the soil dries, I will fert and add some CalMag. Maybe do 3/4 dose of bloom ferts and 1/4 of veg fert?

I also use Dutch Master Liquid Light foliar spray every 3-4 days, realized I forgot to mention that in my list.


As far as the abrupt light increase, yea, I thought about that and it's quite possible, for sure. However, the Girl Scout Cookies has had zero issues and it's even closer to the light (it's the plant on the left in my pictures, LSD on the right). That being said, though, I know different will react differently, so you could be right.


I really appreciate you guys helping me, I really don't want to lose this one
 

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Dr. Who

Dr. Who

Well-Known Member
I,ll add that the use of a 10-30-10 at transition is a hell of a kick in the plant of P. I suspect that you may have early onset of P tox.
I wouldn't start a high P fert like that till around the end of week 3 of flower.
I like the idea of a starting mag def. as well,, as the 2 seem to go hand in hand sometimes.
I do like to "tickle" the P a little at transition by around 3 points from like 2.2 to 5.5. But the Doggett is what I would call as being on the high end of the P scale already. Run the growth for 2 more weeks and use a Cal/Mag at like half strength.....The use of an epsom foliar will get the Mag into the plant faster and help out while the Cal/Mag in the feed is begun to be used (like 5-10 days till it shows).
Start the Bloom feed back up at the start of week 4.
I have run LSD and find it as an "oddly" fussy Indica strain. Indica's tend to be heavy feeders and usually don't mind strong ferts. BUT, like I said...from 5 to 30 in P value is quite the slap...

Good luck.
 
SpicySativa

SpicySativa

Well-Known Member
To the OP -

You REALLY want to rule out environmental issues before throwing more chemicals into the mix. Magnesium is a mobile nutrient, the plant has no reason to show a Mg deficiency at the top leaves before the bottom. If the tops needed Mg, they would pull it from the bottoms.

The fact that the GSC isn't showing symptoms is irrelevant. I'm growing 6 plants from the same seed stock, and one of them bleaches if the lights are too close. Don't get caught up in thinking the two strains should react exactly the same.
 
redeyejedi01

redeyejedi01

Member
Dr. Who said:
I,ll add that the use of a 10-30-10 at transition is a hell of a kick in the plant of P. I suspect that you may have early onset of P tox.
I wouldn't start a high P fert like that till around the end of week 3 of flower.
I like the idea of a starting mag def. as well,, as the 2 seem to go hand in hand sometimes.
I do like to "tickle" the P a little at transition by around 3 points from like 2.2 to 5.5. But the Doggett is what I would call as being on the high end of the P scale already. Run the growth for 2 more weeks and use a Cal/Mag at like half strength.....The use of an epsom foliar will get the Mag into the plant faster and help out while the Cal/Mag in the feed is begun to be used (like 5-10 days till it shows).
Start the Bloom feed back up at the start of week 4.
I have run LSD and find it as an "oddly" fussy Indica strain. Indica's tend to be heavy feeders and usually don't mind strong ferts. BUT, like I said...from 5 to 30 in P value is quite the slap...

Good luck.
Click to expand...
Yea, she's been a finicky bitch since week 1, but perhaps it's been my own fault. Seems like the Epsom foliar is recommended thing to do, so I'll have to go get some of that and give it a try


I'll also move the lights away a bit and see if that helps as well.

Also, don't know if it's worth mentioning, I have two CO2-generating bags (as seen in pictures), might this have any effect on relevant issue?


I appreciate everyones help. I did a good deal of researching and dumped a few grand into my op, but this is only my second grow, so I'm still learning a few things and you guys are a wonderfully abundant source of knowledge, I really do greatly appreciate your patience and time in trying to help.
 
redeyejedi01

redeyejedi01

Member
SpicySativa said:
To the OP -

You REALLY want to rule out environmental issues before throwing more chemicals into the mix. Magnesium is a mobile nutrient, the plant has no reason to show a Mg deficiency at the top leaves before the bottom. If the tops needed Mg, they would pull it from the bottoms.

The fact that the GSC isn't showing symptoms is irrelevant. I'm growing 6 plants from the same seed stock, and one of them bleaches if the lights are too close. Don't get caught up in thinking the two strains should react exactly the same.
Click to expand...

Yea, I'll try moving the lights away and see if that helps. The only reason I have them so close is because they were all Stretch Armstrong during veg and I only have 8ft to work with in the tent, so I was hoping to reduce the big stretch during flower with closer lights and higher night temps, about 76.2 for the first week or two of flower.
 
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