Post mortem - 420 was amazing except for one of my pants giving up

[neneboob]

Hi all, just trying to get a grip on what happened to one of my plants that dropped dead while the rest look great. The seed was a "Cinex auto" from "growerschoiceseeds.com" (not to be confused with https://www.growerschoice.nl) and out of 4, this was the only one to make it past seedling stage. My other autos from Barneys Farms (Lemon haze, Wedding cake) have had the exact same treatment, and have flourished. I'm hoping I can figure out what I did wrong to avoid it next time, or if I need to give up on autos from these guys. Doing some research people seem to have good luck with their Photos, but not their autos.

Currently I'm pretty sure we over did the nitrogen from the way the leaves are clawing at the first sign of problems (didn't know that at the time). However she was due for a feeding, so we thought it was likely a deficiency. After the feeding it got worse, which again leads me to believe nitrogen toxicity. I wanted to flush her but the week got away from me, and it never happened.

Closet grow not sure of the size maybe 3x6ft?
Lights - 3x100w full spec LED
Medium - pro-mix all purpose 5gal fabric pot with ~.5tbsp of big bloom on first soak
Feeding - weekly feeding of fox farm trio ~2tbsp per gal Big Bloom. Then on week 4 add ~2tsp Grow Big, and ~2tsp Tiger Bloom as well. Also one feed of ~2tsp of Bush Doctor CalMag at start of pistols.
Conditions - RH 40-50% temp 70-82F
PH of soil measured throughout at ~6

Planted on 3/2 looked great all the way up until week 5. Then she looked worse after the feed, and then 3 days later it was worse, and 3 days later it was dead while the rest of the plants are starting their stretch from the same treatment.

Here she is ~day 45 Looking happy like her sisters

All 4 plants got a bit dry, all were watered and fed together, and this is 3 days after the picture above. At this point I didn't know to look for the leaf clawing, but now it stands out very obviously. Some leaves were very dry as well.

And then 3 days after that R.I.P:

 

[Galgrows]

RIP

 

[neneboob]

RIP

Your condolences are much apricated.

 

[HerbalEdu]

same treatment as the others ? weird symptom look a lot like root rot.

 

[neneboob]

same treatment as the others ? weird symptom look a lot like root rot.

It's possible but I don't know why this plant would be the only one hit. They are in the same medium, same pot, and have had similar watering schedules. If it was root rot what do you suppose could have caused it so suddenly while not hitting the others? I was planning on checking the roots during the autopsy.

 

[HerbalEdu]

not all plant necessarely drink at the same rate, could happen some plant drink less and if you water all the same each time could happen one get oversaturated slowly over the weeks may be.

weighting the pot and/or inspecting the rootball now should give you a hint

 

[HerbalEdu]

but i don't think too high nitrogen is your issue here, i think that's something else ... not sure what tho'

 

[neneboob]

but i don't think too high nitrogen is your issue here, i think that's something else ... not sure what tho'

Yeah, neither do I. The leaf clawing just started after the first feeding of nitrogen fert, and took a nosedive after being given more. So I'm just trying to work with the knowledge I have I will be sure to check the root ball for any signs of rot though

 

[LoveGrowingIt]

And then 3 days after that R.I.P:

Sorry for your loss.

It's odd how the whole plant looks like it was affected the same for every part of the plant. At first look, I thought it dried, but that usually shows on lower leaves first. I have seen other types of plants dying suddenly like that from shock, like sudden cold, for example. I doubt that explains this, though.

 

[Prich21908]

Looks a lot like my dead plant maybe a virus ?

 

[Oldchucky]

Take a look around the bottom of the stalk where it exits the soil and see if it looks abnormal! And you haven’t seen any mice turds laying around, have you? They like to chew on stalks.

 

[HerbalEdu]

"Root Rot causes droopiness and other symptoms similar to over or under-watering"

Cannabis Root Rot - How to Identify & Get Rid of It Quickly!

Discover how to finally beat root rot (brown or slimy roots) for good! The secret to curing and prevention is a supplement with a particular type of bacteria!

www.growweedeasy.com

Cannabis Root Rot Symptoms​

Symptoms of root rot on newly transplanted cannabis plants.

If you suspect your roots may be having an issue, look for the following root rot symptoms:

• Unhealthy, drooping and curled or clawed leaves
• Burnt leaf tips or edges
• Brown, yellow or bronze stripes or spots
• White or yellow coloration
• Dropping and dying leaves
• Appearance of nutrient deficiencies
• Plants are absorbing less water

Root rot restricts your plant’s ability to draw oxygen, resulting in unhealthy, drooping, clawed or curled leaves. The leaf symptoms of cannabis root rot are extremely varied including burnt tips or edges, nutrient deficiencies, brown, bronze or yellow stripes or spots, and unusual symptoms within the leaves. Once the leaves have started to wilt, the coloration usually turns white or yellow.

The leaves will then start to die and fall off. These symptoms are the result of issues with the roots. Your roots will be unable to absorb nutrients or function correctly. In most instances, your plants will take in much less water. If your plant’s water absorption has changed and any of the other signs are present, you must take immediate action to get rid of the root rot or you will lose your crop.

Loading…

www.trifectanatural.com

 

[neneboob]

Sorry for your loss.

It's odd how the whole plant looks like it was affected the same for every part of the plant. At first look, I thought it dried, but that usually shows on lower leaves first. I have seen other types of plants dying suddenly like that from shock, like sudden cold, for example. I doubt that explains this, though.

So all of the plants in the room had gotten shocked a bit. All showed up a little bit sad. My growmie who tends them daily sent me a picture of one of the other plants in the room (one that perked right up after a watering) and said this:
"Temp was high 77ish and humidity was 50ish. Plants were not liking that. Got the fans on high and humidifier running. It happens fast man. Hopefully they get a good kick of food and back to normal temps tomorrow"

We were drying in another room, and had the A/C running at ~60F, and this was around the time the A/C went back to ~73F. The grow room never got close to was sitting closer to ~70F during the A/C, and then after the A/C change closer to ~77F. I don't know if that could have caused this? At the time I was convinced they were just dry.

 

[HerbalEdu]

what size pots ?
how often are you watering, how many days in between watering ?
what amount of water do you give related to pot size ?

also getting used to the weight of pots when it's just been satured till a little run off and when it's dry could help finding the issue, to me that has something to do with watering pratice.

 

[neneboob]

what size pots ?
how often are you watering, how many days in between watering ?
what amount of water do you give related to pot size ?

also getting used to the weight of pots when it's just been satured till a little run off and when it's dry could help finding the issue, to me that has something to do with watering pratice.

5gal fabric pots. Watering when soil is dry not by schedule (including using the weight method) usually about a week or so. 1/2 gal water at a time.

We learned about joys of overwatering before this seed sprouted, and if anything they are underwatered.

 

[HerbalEdu]

yeah that seem like not much water for plant that size to me too, to give you an order of comparison:

once plant are big enough related to pot size i usually water 1L every 4 days in 6L pots.

 

[LoveGrowingIt]

So all of the plants in the room had gotten shocked a bit. All showed up a little bit sad. My growmie who tends them daily sent me a picture of one of the other plants in the room (one that perked right up after a watering) and said this:
"Temp was high 77ish and humidity was 50ish. Plants were not liking that. Got the fans on high and humidifier running. It happens fast man. Hopefully they get a good kick of food and back to normal temps tomorrow"

We were drying in another room, and had the A/C running at ~60F, and this was around the time the A/C went back to ~73F. The grow room never got close to was sitting closer to ~70F during the A/C, and then after the A/C change closer to ~77F. I don't know if that could have caused this? At the time I was convinced they were just dry.

Maybe shock was involved.

"Temp was high 77ish and humidity was 50ish. Plants were not liking that. Got the fans on high and humidifier running. It happens fast man. Hopefully they get a good kick of food and back to normal temps tomorrow"

The plants should be okay with 77F and 50% RH, unless changes were sudden. What temps & RH does your growmie usually use?

We were drying in another room, and had the A/C running at ~60F, and this was around the time the A/C went back to ~73F. The grow room never got close to was sitting closer to ~70F during the A/C, and then after the A/C change closer to ~77F. I don't know if that could have caused this?

Maybe. I'm not really picturing what happened. The cause may have been a combination of factors or rapid environmental changes. I wouldn't rule out root problems, as well. Maybe some things made other things worse. I can only guess.

 

[neneboob]

yeah that seem like not much water for plant that size to me too, to give you an order of comparison:

once plant are big enough related to pot size i usually water 1L every 4 days in 6L pots.

Yeah the watering schedule I provided was a bit old the daily caregiver stated they have started watering more frequently now that they are bigger.

I do have to admit the symptoms we saw on the plant were very similar to under watering. The clawing leaves, and some of the leaves were dry and brittle even at the first sign of stress. Maybe this one got some root damage from the underwatering, and that's why it couldn't come back like her sisters who just were more sturdy than her?

@LoveGrowingIt
Yeah my immediate response to him was "that temp is not high for these plants" IDK the change in conditions might have had something to do with it but the root damage from a bit of underwatering could really explain how fast she turned mummified.

 

[HerbalEdu]

underwatering, overwatering ( and then root rot) could result in rather similar symptoms, this is where weighting the pot when it happened should tell you if it's one or the other if your used to dry and saturated weigh.

 

[mancorn]

Looks like the growing tips aren’t drooping, which would happen if plant is underwatered. Instead just the leaves are hanging down, indicating over water/root rot.