Flowering: Brown Spots On Top Fan/Sugar Leaves Moving Downward

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deadlysars

deadlysars

44
18
Hello,

I'm about 4 weeks into flowering White Widow. I have 6 plants and it seems only 1 seems to be having this issues. It started off with the top fan leaves having these brown spots a week ago and now its starting to spread down wards and onto the sugar leaves as well. They are in 5 gallon bucket with drain holes.

I use Fox Farm Big Bloom, Grow Big, and Bud and Bloom liquid fertilizer along with Fox Farm Open Seasme, Beastie Bloomz, and Cha Ching and using half strength accordingly to the Fox Farm Feeding chart. I also add a bit of cal mag as well.

PH level is 6.8 when watering and run off was 6.9.

Light cycle 12/12 with 4 X Mars Hyrdro TS 1000 @ 12 inches.

Temp averages 81 during light and 74 at night.

Humidity is averaging 45%. I have 2 small fans, a tower fan and exhaust at all times.

Watering when soil feels dry usually 2-3 days. I do 1 session of nutrients and 1 session of plain water.

Thanks for the help!

20220218 101742


20220218 101640

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Last edited:
Homesteader

Homesteader

3,106
263
I am going to assume it is calcium and you probably are in need of more cal mag. Probably a little late to chase it now, but next time, I would feed it more once you flip to flower. Nothing wrong with the plant consuming some of it as it ripens but you don't want it to eat itself too fast. Week 4 is probably early enough that a bit more calmag would help. If you are in soil, you may want to get a bag of gypsum though. Easier than worrying about it
 
deadlysars

deadlysars

44
18
I am going to assume it is calcium and you probably are in need of more cal mag. Probably a little late to chase it now, but next time, I would feed it more once you flip to flower. Nothing wrong with the plant consuming some of it as it ripens but you don't want it to eat itself too fast. Week 4 is probably early enough that a bit more calmag would help. If you are in soil, you may want to get a bag of gypsum though. Easier than worrying about it
Thanks! yes I'm in soil. I was worried it was leaf septoria or something worse.
 
deadlysars

deadlysars

44
18
Hello,

Going into Week 6 on a 9 weeks flowering schedule for these ILGM White Widows.

In addition, I forgot to mention my PH meter wasn't calibrated right. I didn't noticed till about week 2 and half of flowering.

Two other plants started showing signs of Cal Mag deficiency after about 4 days from the original post, so I feed them a bit more CAL Mag and it seems to work. I also flush those plants first before feeding them since the PPM reading was about 2,000. I brought it back down to 1,200. This was probably the fault of the my PH meter being off so the plants wasn't using the nuts properly. Lesson learned - I will always recalibrate my PH meter every month.

However, in a matter about 3 days Plant #5 all of a sudden gotten really bad with what appears to be Cal Mag and Nitrogen deficiency. It's hard to tell in the picture due to the lighting but the top leaves are really yellow and leaves are turning brown and crispy. Plant #3 and #4 was probably my healthiest plants and within matter of days plant #4 is on life support.

So my question is should I continue feeding accordingly to Fox Farm Nutrient guide and try to wait till 9 weeks to harvest or start thinking about harvesting early so these plants don't eat themsleves to death.

Second question, should I start plucking those deficiency fan leaves cause I figure the plant needs whatever nutrient left from the leaves to survive?


Plant1

Plant2
Plant3
Plant4

Plant5


Plant6

PanaromaShot


Thanks for the help!
 
GNick55

GNick55

Staff
Supporter
5,280
313
Hello,

Going into Week 6 on a 9 weeks flowering schedule for these ILGM White Widows.

In addition, I forgot to mention my PH meter wasn't calibrated right. I didn't noticed till about week 2 and half of flowering.

Two other plants started showing signs of Cal Mag deficiency after about 4 days from the original post, so I feed them a bit more CAL Mag and it seems to work. I also flush those plants first before feeding them since the PPM reading was about 2,000. I brought it back down to 1,200. This was probably the fault of the my PH meter being off so the plants wasn't using the nuts properly. Lesson learned - I will always recalibrate my PH meter every month.

However, in a matter about 3 days Plant #5 all of a sudden gotten really bad with what appears to be Cal Mag and Nitrogen deficiency. It's hard to tell in the picture due to the lighting but the top leaves are really yellow and leaves are turning brown and crispy. Plant #3 and #4 was probably my healthiest plants and within matter of days plant #4 is on life support.

So my question is should I continue feeding accordingly to Fox Farm Nutrient guide and try to wait till 9 weeks to harvest or start thinking about harvesting early so these plants don't eat themsleves to death.

Second question, should I start plucking those deficiency fan leaves cause I figure the plant needs whatever nutrient left from the leaves to survive?


View attachment 1221454
View attachment 1221453 View attachment 1221452 View attachment 1221451
View attachment 1221448

View attachment 1221449
View attachment 1221455

Thanks for the help!
what light you using and how far?
 
GNick55

GNick55

Staff
Supporter
5,280
313
what light you using and how far?
should print this out as a poster and put up in your grow area.. with soilless or soil always feed what’s needed 4-5 days before.,
part of your issue is following the nutrient feeding chart.,
58D67F11 A316 4044 A696 48C830624C84
 
Dragon140237

Dragon140237

2
1
Man I've had the same problem this run, I think maybe what it is , is chaching is blocking out the calcium. Last run I only used tiger bloom and the main ones and bembe and had no problems.
 

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