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The strangest disease in the world.

Powidok

New member
hello, at the beginning I would like to point out that I use a translator but I hope that we will get along, for many months and many attempts I have problems with seedlings, I spent many hundreds of hours learning and analyzing my problem, thanks to the trials I learned hydroponics, both passive and dwc method, I remember about it just so that you don't consider me a total amateur who pours a gallon of water with fertilizer into a seedling as for a large plant. The problem with my seedlings is that after about 2 weeks they stop growing, both the roots and the rest of the plant, then the lower leaves begin to wither and slowly move up, the plant seems to be blocked, it happens in any type of substrate, from different soil producers to different hydroponic substrates and this only happens with hemp and tomato (supposedly tomato is very close to hemp) other plants grow healthy and without problems in the same conditions, I used many variants of soil, plagron, biobizz, canna, soil with flower shop, weaker and fertilized version, there was coconut, mixes with perlite, I cooked coconut, I did everything that came to my mind, I changed seed stores, I changed varieties, lighting from fluorescent to led ts600 and ts1000, I changed types of water until I bought a filter RO3, I used digital and drip pH meters, of course they were calibrated, and the EC meter, I used beneficial fungi and bacteria, I did everything possible e changing variants not once and not twice but several times and I still fail sadly, it takes more than a year, everything else grows beautifully except hemp and tomato, do you know the disease of house plants that may kill hemp seedlings while the ornamental plants themselves can live ? or maybe there are types of plants that hemp does not like? people advised me basic mistakes that I overwater ... I made a lot of attempts and followed the recommendations even when they were idiotic, I followed every advice, weighed the pots, sprayed instead of watering so as not to overwater (although it's hard to overwater a plant in hydroponics ;)) and still I fail and there was a beautiful pepper next to me that gave me fruit without any great effort... have you ever heard of such a case? I will add that I care about cleanliness, I was always surprised watching the photo report how people can get dirty but still they enjoy healthy hemp, I have a few ornamental plants, I'm thinking of throwing them away, wait a month and try again, I've already spent a fortune on the seeds I downloaded not only from various stores in my country but even from the RQS manufacturer from their warehouse, fertilizers (biobizz, ghe, canna, biotabs, root additives, additives in the form of beneficial bacteria from the Bacillus family), electricity, equipment and nerves ... because it's really sad and the worst thing is that everything you can think of i've already done it, changed it, corrected it, checked it, even moved the cupboard to other places in my house because i already considered the impact of energy vortices, i know it sounds like crazy and madness but imagine 17 months of continuous attempts ending in failure, the problem is not me and things like overwatering, overfertilization, I changed all that, I kept notes with sem pH and EC and the amount and size of watering together with the weighing of the pot, have any of you encountered something like this personally or through your friend? I will add that there are no symptoms of root rot, if it was an overt pathogen that would kill hemp and immediately peppers, I would be happy to have the culprit, but peppers, geraniums, kitchen herbs, catnip, everything grew without a problem, I had catnip in dwc in one letter jar and grew to such a size that it covered half of my 40 inch TV, and hemp? it dies over and over again and always the same way, I've never had a cannabis taller than 20cm with more than 6 tiers of leaves, not once.
 

Powidok

New member
IMG_20230221_124949.jpg
 

Powidok

New member
Last night I read on our forum about a strange problem with grow tents, that plants were dying in them, it was about some chemical compound, strange thing, I don't have a tent, I have a small cabinet but this topic with the tent shows that there are strange cases that not they always know and the equipment guarantees success, my case is strange, what's worse, I'm out of ideas, all I have to do is throw away decorative flowers like geraniums, aloe vera, monstera, some creepers, etc., unless I am cursed or there is some device in my vicinity strong harmful signal? Believe me... I'm out of ideas and that's the worst thing, at the very beginning my failures gave me hope, after the first failed attempt I bought 3 pH meters, 2 digital and droplets, I always checked with two to make sure that the meter works, of course were calibrated, and after each failure, further changes, changes in technique, changes in watering, changes in soil, changes in seeds, changes in water, etc. until I am here now where I have no ideas, the strange thing is that basil, catnip, peppers (different varieties) are growing and in the soil and in the hydro ... And the hemp and the tomato are sick, I sowed the tomatoes a few days ago, I'll be separating them any day now, 2 will go to the coconut and the other two to the basket with balls and I'll make a Method grid or connect an aerator, I'm doing it just for science, for a test to find out the cause of the problem because I spent a lot of money on seeds that are not cheap.
 

Cerathule

Well-known member
You can use hemp birdfood seeds to sprout until you've found out how to veg Cannabis healthily, it shouldn't be too difficult. And no, Cannabis is not like tomato, tomato need far more K and less N in comparison, esp. during flower. A plant very close in nutritional demand to hemp is the rose. But how cannabis is fed is no secret just that many products are not made for it, even when it's labelled so. Most of it is just to make money by repacking standard garden bloom fertilizer. For example, you don't need PK for Cannabis but rather a balanced dietary solution with a focus on nitrogen in veg.
If you use Biobizz, you just need Allmix, start in a small 1l pot, give RO + Calmag to EC 0,2, and give about 30% of the volume of filled in earth. I'd prefer closed plastic pots over fabrics and you gotta observe a good wet and dry cycle especially for little plants. You don't need to fertilize for the next 2 weeks and once the plant outgrows the pots, you simply uppot to somwthing x3 to x4 times the size of the old pot. Later in flower you can increase Calmag up to EC 0,4 - once the pots medium is leached out.

You gotta look to not kill them with light so initially I'd put PPFD to 150 at 24/0 for sprouts. After 2 weeks, once all have sprouted, you go up to 400PPFD on 18/6. In flower 12/12 700PPFD (just as a general rule). Now when you don't have a quantummeter you can use photon app or use a luxmeter and a conversion software that calculates from the spectrum of your lamp. These are not very precise so there may still be an error within a margin of +-30%.
At some point you need to fertilize and how you do this is really dependant on the products to use. It could be as simple as giving a one time mineralic fertilizer solution at week 3 in flower and be done if the pots are filled with earth and of reasonable size.

Try to reach at least 25°C ambient with light-on (under LED 27°C would be perfect) but they will still grow fine without any problems somewhere in between 22°-30°C. If rH is anywhere between 40-70% you're good, and just try to have a little soft breeze gently over the tops, and later in flower, you can lollipop some of the lower sucker branches or old fanleaves away for better airflow and less humidity if that is warranted.

Plants are very slow lifeforms and REALLY don't like it when you change too much in a too short of timeframe. Make a plan, then just let them grow. You can even resort to a detailed growreport here (or elsewhere) where the plants look vigorous, and you're environmental parameters are somewhat met, then copy this persons setup and what he did.

Hope this helps a bit
 

TanzanianMagic

Well-known member
Veteran
hello, at the beginning I would like to point out that I use a translator but I hope that we will get along, for many months and many attempts I have problems with seedlings, I spent many hundreds of hours learning and analyzing my problem, thanks to the trials I learned hydroponics, both passive and dwc method, I remember about it just so that you don't consider me a total amateur who pours a gallon of water with fertilizer into a seedling as for a large plant. The problem with my seedlings is that after about 2 weeks they stop growing, both the roots and the rest of the plant, then the lower leaves begin to wither and slowly move up, the plant seems to be blocked, it happens in any type of substrate, from different soil producers to different hydroponic substrates and this only happens with hemp and tomato (supposedly tomato is very close to hemp) other plants grow healthy and without problems in the same conditions, I used many variants of soil, plagron, biobizz, canna, soil with flower shop, weaker and fertilized version, there was coconut, mixes with perlite, I cooked coconut, I did everything that came to my mind, I changed seed stores, I changed varieties, lighting from fluorescent to led ts600 and ts1000, I changed types of water until I bought a filter RO3, I used digital and drip pH meters, of course they were calibrated, and the EC meter, I used beneficial fungi and bacteria, I did everything possible e changing variants not once and not twice but several times and I still fail sadly, it takes more than a year, everything else grows beautifully except hemp and tomato, do you know the disease of house plants that may kill hemp seedlings while the ornamental plants themselves can live ? or maybe there are types of plants that hemp does not like? people advised me basic mistakes that I overwater ... I made a lot of attempts and followed the recommendations even when they were idiotic, I followed every advice, weighed the pots, sprayed instead of watering so as not to overwater (although it's hard to overwater a plant in hydroponics ;)) and still I fail and there was a beautiful pepper next to me that gave me fruit without any great effort... have you ever heard of such a case? I will add that I care about cleanliness, I was always surprised watching the photo report how people can get dirty but still they enjoy healthy hemp, I have a few ornamental plants, I'm thinking of throwing them away, wait a month and try again, I've already spent a fortune on the seeds I downloaded not only from various stores in my country but even from the RQS manufacturer from their warehouse, fertilizers (biobizz, ghe, canna, biotabs, root additives, additives in the form of beneficial bacteria from the Bacillus family), electricity, equipment and nerves ... because it's really sad and the worst thing is that everything you can think of i've already done it, changed it, corrected it, checked it, even moved the cupboard to other places in my house because i already considered the impact of energy vortices, i know it sounds like crazy and madness but imagine 17 months of continuous attempts ending in failure, the problem is not me and things like overwatering, overfertilization, I changed all that, I kept notes with sem pH and EC and the amount and size of watering together with the weighing of the pot, have any of you encountered something like this personally or through your friend? I will add that there are no symptoms of root rot, if it was an overt pathogen that would kill hemp and immediately peppers, I would be happy to have the culprit, but peppers, geraniums, kitchen herbs, catnip, everything grew without a problem, I had catnip in dwc in one letter jar and grew to such a size that it covered half of my 40 inch TV, and hemp? it dies over and over again and always the same way, I've never had a cannabis taller than 20cm with more than 6 tiers of leaves, not once.
Hi Posidok,

The best thing is to simplifly.

1. Start with a bagged coco coir, preferrably from Canna, however Plagron is good too and Biobizz is probably also good.

2. Feed a late bloom fertilizer for the first 2 weeks, plus espsom salt (MgSO4).

Feed 100 PPM or 0.2 EC of high P/K fertilizer like Plagron Green Sensation and 50 PPM or 0.1 EC of Epsom Salt.

Soak the coco coir in this for at least a day if not longer before using it.

After a week or so, go to regular Canna A+B fertilizer at 150 ppm and slowly increase it as the plant grows.

3. Stick to a 6.0 pH

You can literally stick to this for the entire grow. Forget about pH for hydroponics, coco coir has it's own preferred pH range.

Coco Coir: 5.8 - 6.4
Hydro: 5.2 - 5.8

However for coco coir, just stick to 6.0 and you'll be fine.

4. At first, only water when the coir is no longer wet.

Yes, you can overwater in coco coir. That's why I like to stick to very low nutrient concentrations and limited watering first, so the root system is stimulated to develop. It is through the roots that the plant takes up it's nutrients, so it is as important to have a strong healthy root system as it is to give them the right amount of nutrients. In fact the bigger and healthier the root system, the fewer nutrients you need to feed them.

In soil, I either water when the top of the soil no longer has moisture in the morning or have a water reservoir that is constantly there for the plants.
 
Last edited:

Mattbho

Active member
We need way more info . I'm going to say overwatered in soil and too low rh just a stab .

Try and answer as many questions as u can and I promise the members here will get to the bottom of this . After all your trying to grow a weed .

NOTE: Please Cut And Paste only the section that applies and add your response. The more information you can give the better and faster people can help you out.Pictures should be added to every thread to ensure a proper diagnosis, when using pictures please ensure your HPS if using one is not turned on while taking pictures, as the lighting hides the plants problems. Fill out

ARE YOU USING?

SOIL:


How long has this problem been going on?
What STRAIN are you growing?
What was the establishing technique? (seed or clone?)
What is the age of your plants?
How long have they been in the soil mixture they are in now?
Were they in the same mixture when they were seedlings/smaller plant? If not, what mixture were they in before?
How Tall are the plants?
What PHASE (seedling, vegetative or flower) are the plants in?
What Technique are you using? (SOG, SCROG etc)
What size pots are you using? (Include how many subjects to pot)
What substrate/medium are you using? What brand of soil mixture are you using?(percentage of perlite, vermiculite...etc?)
What brand Nutrient's are you using?
How much of each nutrient are you using with how much water? *Knowing the brand is very helpful*
How often are you feeding?
If flowering, when did you switch over to using Bloom nutrients?
What order are you mixing your nutrients? (example: veg nutes 1st, bloom 2nd ect)
What is the TDS/EC/PPM of your nutrients used?
What is the pH of the "RUN-OFF"?
How often are you testing pH/ppm/EC/TDS?
What method of pH test was administered? Using Strips? pH pen?
How often are you watering?
When was your last feeding and how often are you feeding?
What size bulb are you using?
How old is your bulbs?
What is the distance to the canopy?
What is your RH Factor? (Relative Humidity)
What is the canopy temperature?
What is the Day/Night Temp? (Include fluctuation range)
What is the current Air Flow? (cfm etc.)
Tell us about your ventilation, intake exhaust and when its running and not running ?
Is the fan blowing directly at plants?
Is the grow substrate constantly wet or moist?
Is your water HARD or SOFT?
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water?
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)
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?
Has plant been recently pruned, cloned or pinched?
Have any pest chemicals been used? If so what and when?
Are plant's infected with pest's?


HYDROPONICS/Aero Ponics/Coco/Soiless/

How long has this problem been going on?
Are you growing in a PVC grow tent? (example: Hydrohut or any other non brand tents)
What system are you running? (DWC? Ebb flow? Aero? Water Farm? Flood Tables? and so on...)
What STRAIN are you growing?
What was the establishing technique? (Were the seed or clone?)
What is the age of your plants?
How long have they been in there mixture they are in now?(coco,soiless etc..)
How tall are the plants?
What PHASE are the plants in? (seedling, vegetative or flower) are the plants in?
What Technique are you using?
What substrate/medium are you using?(Hydroton, RockWool etc.)
What is the Water temperature?
What color are your roots? White? Brown? Are your roots slimy?
What Nutrient's are you using?(If growing soiless)
How much of each nutrient are you using with how much water? *Knowing the brand is very helpful*
How often are you feeding? (If using soiless)
How often are you giving nutrients? (If using soiless)
If flowering, when did you switch over to using Bloom nutrients?
What order are you mixing your nutrients? (example: veg nutes 1st, bloom 2nd ect)
What is the TDS/EC/PPM you are using
What is the pH of the "Tank"?
How often are you testing your pH/PPM/EC/TDS?
Are you sure your calibration is correct on your equipment?
When was your last watering?
What is your water temps?
When was your last feeding change? (ie. grow-bloom-micro-additional)
How often do you clean your system: example: Flush out water replace with clean water and nutrients?
What size bulb are you using?
How old is the bulbs you are using?
What is the distance to the canopy?
What is your RH Factor(Relative Humidity)?
What is the canopy temperature?
What is the Day/Night Temp? (Include flucutaion range)
What is the current Air Flow? (cfm etc.)
Tell us about your ventilation, intake exhaust and when its running and not running ?
Is the fan blowing directly at plants?
Is your water HARD or SOFT?
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water?
If using tap water, what is the ppm/EC/TDS of the water right out of the tap?
If using RO,Distilled,mineral water, what is the ppm/EC/TDS without any additives?
Are you using water from a water softener?
Has plant been recently pruned, cloned off of or pinched
Have any pest chemicals been used? If so, What and When?
Are plant's infected with pest's
 

NEED 4 SEED

Well-known member
If the seedlings were much smaller I would have said maybe fungus gnats, but the plants in the pics are probably too big to be killed by them. Do you see those tiny black flies around plants? If your eyes are bad get some yellow stickers and see if they catch something. Other thing: I just find the pots too big for the plants. Others will say that's fine, ok. And don't re-use soil.
 

therevverend

Well-known member
Veteran
First off let's look at what's not a problem. The plant is not stretching, it's growing properly for a seedling. Nice and stocky and wide. Getting plenty of light so that's not the problem. The light could be too close to the plants, cooking them, but I think it's unlikely. Light burn looks entirely different.

Your description and picture look like a fusarium wilt type disease causing dampening off. Cannabis needs a wet/dry cycle, this is facilitated by good air flow. So do tomatoes. Wilt happens from the bottom up, killing each set of leaves. Check the roots for bad smells or discoloration. Tents can create humid stuffy conditions. When you open your tent does it feel like a sauna inside? Warm, muggy, humid air? I would install a fan and/or leave the tent open most of the time. I don't like closed up tents, they inevitably create overly humid conditions.

It sounds like you're not overwatering but lack of airflow causes the same conditions. The roots are wet all the time and aren't able to breathe. They're unable to take up nutrients and fungal problems develop. Your plants look like they're suffering from N deficiency. I don't know if they are; fusarium wilt can cause the plant to be unable to take up nutrients. Cannabis plants have enough nutrients in the seed so they don't need or want nutrients for the first two weeks of life. After that they require steady feeding, not just of N but P,K, and micro-nutrients. Without proper nutrition they'll look great for two weeks but after that they'll slowly fade to yellow.

Another problem could be PH. You want to make sure your water is good. A simple PH test is cheap and easy. Fusarium wilt could be caused by water containing bacteria. It's rare now because tap water is usually sterile but if you're using a dirty bucket and letting the water sit in it until crud grows in it, there will be problems. Not saying you're doing any of this stuff but you want to make a checklist to go down. I've never had problems with my tap water but my county has a good water supply. If you suspect your water could be off you can have it tested.
 

Dime

Well-known member
Your plant is very hungry,don't make too many changes at once . Buy some 3 part GH or other high end nutrients and follow the mixing instructions for the stage of growth. Buy some promix and fertilize the medium 1/4 strength before planting a seed keep the light up and lower it as they get bigger and you can increase nutrients when needed,keep it simple and watch them grow and get the feel. Best of luck.
 

Powidok

New member
gentlemen, 99.99% air is to blame, it's about volatile compounds, I bet it's my carpet on the floor, it's a PVC carpet, where do I get these conclusions? on a par with hemp and tomato dies the same way, I did an experiment, I planted 5 tomato seeds in 3 small pots, 2 pots with coconut and one in the ground, the pot with soil and coconut were put in large jars, the third pot with coconut was contact with the air in my room, what effect? the tomatoes in the jars have grown as big as never before, the tomato that breathed the air in the room is the living dead, 5x smaller, the problem exists and it is the air. I'm betting my carpet is old PVC, I think it releases some kind of chemical that tomato and hemp are very sensitive to. added photo of tomatoes.
 

Powidok

New member
there is a similar topic here on the forum, it concerns the gassing of growing tents, I don't have a tent, I have a micro cabinet, but I have the same type of floor throughout the house, it's about PVC flooring, there are many studies and articles about harmful compounds, I believe that this happened to me, the evidence supporting my thesis is a photo of tomatoes, coincidence? certainly not. The toxin has a paralyzing effect on the plant, the plant has ideal conditions but stops after 7 days and slowly dies, it's always the same. I think I already know the culprit.
 

Powidok

New member
thank you all for your willingness to help, everything you wrote about is known to me, I know about soil and hydroponics, I have successfully grown peppers in hydroponics, I understand that you bet on simple mistakes such as too much water, wrong soil, too strong light, etc., I understand it I would have thought there myself but I am not to blame for the hemp dying tomatoes, it is the air to get me to where I am now with this knowledge, I spent 2 years trying and learning, reading articles from all over the world, I would never have thought that it's air, but when you try everything, you changed everything, you do everything step by step according to guides, according to instructions and you still suffer sad failures, then doubt comes, I had it, 2 years of struggle, loss of money, sadness and nerves, a year of break because I doubted and for 2 months I'm looking again and I think I finally have the culprit, the air is 100% to blame, the experiment with tomatoes confirms it, now I have to find out what triggers these harms We have good connections to the air, for 99% it will be the old carpet but I will find out when I replace it with a new one, thank you all again.
 

TanzanianMagic

Well-known member
Veteran
"It looks like 20% rh air was blown rapidly at the seedlings that had too much light as well. The jar test proves the humidity is the issue"

And adding perlite to coco coir makes it hold less water too. The coir and perlite combo looks pretty dry.
 

NEED 4 SEED

Well-known member
gentlemen, 99.99% air is to blame, it's about volatile compounds, I bet it's my carpet on the floor, it's a PVC carpet, where do I get these conclusions? on a par with hemp and tomato dies the same way, I did an experiment, I planted 5 tomato seeds in 3 small pots, 2 pots with coconut and one in the ground, the pot with soil and coconut were put in large jars, the third pot with coconut was contact with the air in my room, what effect? the tomatoes in the jars have grown as big as never before, the tomato that breathed the air in the room is the living dead, 5x smaller, the problem exists and it is the air. I'm betting my carpet is old PVC, I think it releases some kind of chemical that tomato and hemp are very sensitive to. added photo of tomatoes.
I was living in a flat with worden floor and pvc carpet that emitted gases that made me sick. It was the combination of the wood and the pvc. On a concrete floor and with a tight fit the off-gassing wouldn't have been that enormous. But the loose carpet and the old material was a bad combination. I suspect even the wood was treated with wood insecticide. So this flat made me very sick. I tell ya get out there or do something about it. Thing in my case is, that the plants weren't harmed in any way..
 

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