Guide for Diagnosing Plant Problems
- Thread starter shenagen
- Start date
roachfinder
Well-Known Member
what would it be if my leaves have yellow and light green patches? and leaves curling downward a little bit?
roachfinder
Well-Known Member
It sounds like we have the same problem. so i hope someone knows maybe
roachfinder
Well-Known Member
oh yea to add on to what i said....i started using straight water on 2 plants bc the one was almost done, but now i have 1 and it has another 7 weeks or so. im not sure why i didnt continue the nutrients on this one but i guess its good to get the salts out anyway. i use advanced nutrients and i started at full strength again for the past week. but they didnt gain any color. but once the leaves turn yellow do they stay yellow??? they arent damaged really
onebadSandman
Member
Hope I can jump in here, noticed this a week ago and it has gotten progressively worse, no Picts of them today but the spot have consumed the 4 or 5 leaves and I am now noticing that its spreading to newer leaves., thought might b a Ph issue since the soil has done well in the past, and should contain all the nutrients for a life cycle. although this a new strain to me.
Need some advice, noticing the start of a def. I believe. Any help would be great!
150w HPS-2'x2'x5' active exhaust 120c.f.m +6" fan=70 deg./80deg.@
20-35% humidity
Soaked seed SW >1%/28hrs.
.75coir/.25soil(roots)-3" pot
SuperSoil base/Roots/5gal. Smart-pot.
Co2 5lb. Tank = 28. Days(1500ppm)
H2o 11/22 myco's
Aerated H2o 11/25
H2O 11/27
*Stretch=temp(75-91)or lack of 460/480nm
*no stretch, leaves curling toward LED
H20 11/29
*removed LED, curling leaves 11/30
tea 50% foliar(EWC,SW,mycos,molasses), H2O-12/01
H20 12/03
Aerated H20/SW/FE >2%
*new roots out bottom of pot 12/05
H20/mycos,12/06, repotted 5gal
dressed with1.5" perlite 12/07
cropped 1/8 above 4th node(clone)12/09
*12/10 leaves dark green, tips burn,twisting, spotting
*12/10 Flush with 5 gallons of H2O burned leaves/not draining/disturbed soil to bottom(Aerate)???
12/13 aerated H20
*looks better
12/14 foliar H20/2 drops Super thrive
12/17 H20
12/18 foliar SW/ST
12/19 50% SW/HA/DL/FE/PP/A/Myco's
*flower12on12
H20 aerated 12/22
H20 aerated 12/26
50% EWC/BG/HA/RP/SW/DL/M/ST/ Myco's 12/29
*12/31 foliar neem oil/H20
*01/01 H20-light
*01/06 EWC/BG/SW/HA Molasses 100%(spotting on 3-4 older leaves, Mg. Ca. or P?)
Ca. or P?
*01/08 up pot(7gal) S.S./H20
spotting on oldest middle fan leaves
*01/12 flushed soil( lowered Ph to 6.2) run off=6.8, spotting looks like deficiency K, P???
Need some advice, noticing the start of a def. I believe. Any help would be great!150w HPS-2'x2'x5' active exhaust 120c.f.m +6" fan=70 deg./80deg.@
20-35% humidity
Soaked seed SW >1%/28hrs.
.75coir/.25soil(roots)-3" pot
SuperSoil base/Roots/5gal. Smart-pot.
Co2 5lb. Tank = 28. Days(1500ppm)
H2o 11/22 myco's
Aerated H2o 11/25
H2O 11/27
*Stretch=temp(75-91)or lack of 460/480nm
*no stretch, leaves curling toward LED
H20 11/29
*removed LED, curling leaves 11/30
tea 50% foliar(EWC,SW,mycos,molasses), H2O-12/01
H20 12/03
Aerated H20/SW/FE >2%
*new roots out bottom of pot 12/05
H20/mycos,12/06, repotted 5gal
dressed with1.5" perlite 12/07
cropped 1/8 above 4th node(clone)12/09
*12/10 leaves dark green, tips burn,twisting, spotting
*12/10 Flush with 5 gallons of H2O burned leaves/not draining/disturbed soil to bottom(Aerate)???
12/13 aerated H20
*looks better
12/14 foliar H20/2 drops Super thrive
12/17 H20
12/18 foliar SW/ST
12/19 50% SW/HA/DL/FE/PP/A/Myco's
*flower12on12
H20 aerated 12/22
H20 aerated 12/26
50% EWC/BG/HA/RP/SW/DL/M/ST/ Myco's 12/29
*12/31 foliar neem oil/H20
*01/01 H20-light
*01/06 EWC/BG/SW/HA Molasses 100%(spotting on 3-4 older leaves, Mg. Ca. or P?)
Ca. or P?
*01/08 up pot(7gal) S.S./H20
spotting on oldest middle fan leaves
*01/12 flushed soil( lowered Ph to 6.2) run off=6.8, spotting looks like deficiency K, P???
Hash Lover
Well-Known Member
Hey Guys, This is a pretty good problem guide. You might be able to find your problems here. https://www.icmag.com/ic/showthread.php?t=11688
I've got an issue with one of my girls that I need help solving.
Not quite sure what the problem is, and this is my first time grow - so it's a little paint my numbers.
I checked the trichomes today, and they're about two weeks away from harvest.
Any help or advice would be much appreciated.
View attachment 2478520View attachment 2478521View attachment 2478522View attachment 2478523
Not quite sure what the problem is, and this is my first time grow - so it's a little paint my numbers.
I checked the trichomes today, and they're about two weeks away from harvest.
Any help or advice would be much appreciated.
View attachment 2478520View attachment 2478521View attachment 2478522View attachment 2478523
Hash Lover
Well-Known Member
Looks like P deficiency in part (the light spots in the middle of the leaves) But looks like more issues than that. Maybe some under watering or over water too. You been fertilizing ? Check the guide I posted above, it has good pics to help find your problems.
Hash Lover
Well-Known Member
Sandman, depending on what you are using for water (if it starts out with a low PPM which would mean its soft water) you might try some CalMag for the spots. If your soil isn't draining you need to change it for the next run and just hope for the best for now. You NEED to use a soil that drains well. But overall your plants look pretty good.
Hash Lover
Well-Known Member
You need to post pics when you are looking for help, it's hard to say if we can't see them. And read through the guide I posted.
onebadSandman
Member
Starting to think it might be fungus,what do you think??,used dolomite lime in soil mix, feel the Ph is within good range(soil run off and H20,7.0/6.8
, cant see why it would be Ca.,but my feed water is >50ppm. Gonna try Copper sulfate, on a few leaves,and keep the vent fan on while lights r out for few days. If that doesn't work, I'll try Ca/mag. Can u tell me if dolomite lime can be watered in??Thanks for the input!
"Hope it not systemic or in the root zone, and that I can figure this out before its to late, she still has five or six weeks left"
Hash Lover
Well-Known Member
I don't know if it could be a fungus. It's good to keep at least some fans on while the lights are out to maintain good air flow around your plants. I don't remember if the Dolomite is the fast acting lime or not, you could google to find out. If your water is distilled or very soft it will help to add some Calmag, it helps with some of the micro nutes that would be found in a heavier water if you were using it. and once the spots are brown I don't think they will go away. all you can do is keep them from getting worse. If you look at the guide I posted and look at the pics of calcium deficiency your spots look similar. Although that one looks a little further along than yours. And when you are trying to fix a problem it can take several days to start to see results. Here's a thread about Calmag that says it better than I can., http://boards.cannabis.com/hydroponics/155387-if-you-use-ro-distilled-water-you-need-calmag-plus.html
onebadSandman
Member
Thanx, haven't grown this strain before, and aim not used to having to add anything other than h20 and the ending guano teas, ideally. So I'll give it a couple days and research calcium deficiencies and soil amendments.
Yeah after looking at deficiency guides I'd narrowed it down to a P deficiency.
Someone also suggested to me that it might be have root rot, but I checked the roots and they smell normal.
I did give her a lot of water the other day because of the heat we're experiencing, and I stopped with the nutrients a week ago and began flushing with water.
I haven't watered her for three days now, but her coco is still quite moist.
Someone also suggested to me that it might be have root rot, but I checked the roots and they smell normal.
I did give her a lot of water the other day because of the heat we're experiencing, and I stopped with the nutrients a week ago and began flushing with water.
I haven't watered her for three days now, but her coco is still quite moist.
Hash Lover
Well-Known Member
Ya, the 'P' would be my guess too by the way the patches look on the leaves. I've never tried coco but it sounds like it's staying wet to long and they don't get enough oxygen to the roots. Why were you flushing ?
noobsaibot1
Active Member
Please help, What is going on with my plants? I grow in soil , use fertilizers Canna 
iwearpanteez
Member
i need help i am a new grower my first grow i have one plant thats sick i am trying a small homemade dwc
2 gal tote
2 100 w 65k cfls
1/4 strength foxfarms
ph level always 5.8
plant bagseed 4 weeks old
growing in lava rock
i see yellowing on lower leaves looks like burnt spot on lower and upper tips are getting burnt and the stems are turning purplish red
was going so good been on nutes for 2weeks and now seems id has a bunch of problems
i have 2 other plants in a AG thats growing great i would love to see if maybe this plant can be saved i hope someone can help me
thanks for the help in advance
2 gal tote
2 100 w 65k cfls
1/4 strength foxfarms
ph level always 5.8
plant bagseed 4 weeks old
growing in lava rock
i see yellowing on lower leaves looks like burnt spot on lower and upper tips are getting burnt and the stems are turning purplish red
was going so good been on nutes for 2weeks and now seems id has a bunch of problems
i have 2 other plants in a AG thats growing great i would love to see if maybe this plant can be saved i hope someone can help me
thanks for the help in advance
~Dankster~420
Well-Known Member
It sounds as if your PH is within the correct range if it is holding at 5.8 as you say.
So I am going to post you a quick deficiency guide so you can read on it & hopefully pick which one that matches what's going on with your babies!
Quick Deficiency Guide
(x) Nitrogen: Entire plant is light green in color; lower leaves are yellow; growth is stunted....
(x) Phosphorous: Entire plant is bluish-green, often developing a red or purplish cast; lower leaves may be yellow, drying to a greenish-brown to black color; growth may be stunted...
(x) Potassium: Leaves have a papery appearance; dead areas along the edges of leaves; growth is stunted...
(x) Magnesium: Lower leaves turn yellow along the tips and margin and between the veins; the lower leaves wilt...
(x) Calcium: Young stems and new leaves die...
(x) Iron: Leaf tissue appears yellow, while the veins remain green...
(x) Copper: Leaf edges appear dark green or blue; leaf edges curl upward; young leaves permanently wilt...
(x) Mananese: Growth is stunted; lower leaves have a checkered pattern of yellow and green...
(x) Boron: Young leaves are scorched at tips and margins...
Molybdenum: Leaves are stunted, pale green, and malformed...
Sulfur: Young leaves turn pale green, while the older leaves remain green; plant is stunted and spindly...
Zinc: Leaf tissue between the veins is lighter in color; yellowed; papery in appearance...
Heat Stress: looks alot like nutrient burn, except it occurs only at the tops of the plants closest to the lamps. There's only one cure for this...get the heat away from the plants.
Light burn: White, bleached portions of leaves nearest the light also burnt necrotic patches if the damage is severe.
(x) Ph Problems: One of the first signs of having a slight ph problem is, your plant having part of the leaves kind of twisty, spotty with brown, yellowish, red spots within each other.