M
mannitu68
- 112
- 43
hello folks,
forgive me when not introducing myself, i will manage to do so later :). I just opened my tent and was surprised to see that even more leaves are affected now than yesterday. I bet you get a lot of posts from people that sound exactly like this, but i really have no other solution what to do. Ive used all information and websites to my best knowledge and abilities, but i havent been able to make sure what deficiency or other symptom is going on here. This is my 1st grow, i had 2 problems so far that i have been able to solve on my own, one was a phosphorus deficiency in mid veg, i tended to be a little to shy with fertilizers, second was a problem with chronic underwatering, i was too afraid to drown my plants, in the end one plant developed twisted and deformed leaves and some brown spots, mabye boron deficiency i thought. However ive been able to get rid of both things fast and succesfully, now after 3 weeks in flower trouble strikes again, hard and fast. I saw it on 1 or 2 leaves, didnt think much about it, now its 3 days later and i see about 10 leaves affected. I will try to give as much information as i can, i appriciate if you dont give any random ideas or what it could be, but only tell if it def. rings a bell and you know whats going on here. Im tired out after reading and watching videos, many with contradicting analazys and resumes.
I should say that i have 2 pots, 1 plant is in a 3 gallon pot, thats the one that is affected. 2 other plants are sharing a 4, gallon pot, they show no signs of problems, all are using same soil, watering, fertilzers concentration. The affected plant is a little smaller than the ones in the big pots, so it takes water and nutrients in slower than the big pot. i weigh the pots each day and it loses only about half the weight than the big pot with the 2 plants.
Time: 3 weeks into flowering 12/12
Symptom: leaves develope small, brown-rusty spots, together with some tiny green-yellowish discolouring, it starts from the inside of the leave, not the tips. Spots become necrotic and after a few days some leaves are totally dead and dried out and you could easily break them off. Upper leaves are affected, but not the small ones on the very top around the buds. Lots of leaves are showing first brown spots now.
medium: soil with 6,4ph, im watering with tapwater, a 2 component fertilizer and a small amount of calmag, always around ph 6, sometimes a little less or more.
Light, temp and enviroment: 20-24 degree celsius, im keeping the humidity under 60% now, most around 45-55%. Light is plenty, 150 watt LED panel for 2x2 feet.
Fertilizer: for the most time i used a simple 7-5-6 allround fertilizer from the supermarket and have to say i was pretty happy. Besides a small phosphorus def. in early stages..i doubled up the concentration t 4ml/l and everything run perfect. Then 3 weeks ago, i deceided to buy another fertilizers, because i read its a good idea to reduce Nitrogen. So i got myself a 2 component-mineral fertilzer with the NPK ratio 8-0-0 in bottle A and 0-4,2-16 in bottle B. Its also supposed to have all the other micronutrients for cannabis, at least it says so. Youre supposed to mix them up. Right now im using, per liter : 2ml of A, 4ml of B and 1ml of calmag (4%calcium/1%magnesium)
i tend to make a "light flush" about every 4 weeks, before watering i put about 1,5l tapwater, ph to 6,0, in the pots, then i water regular until it loses about the same amount of water at the bottom, just to flush out any possible amounts of dried salts at the bottom. Ive never been aggressiv with fertilizers, even now im just using 75% of recommendet dosage. I did check the runoff water one time, but ph was unspectacular, just over 6.0.
because of the nature of flowering, i did first suspect that this must be a phosphorus or potassium deficiency, because of elevated requirements in flower. I did however already have phosphorus def, at least im sure of that, allthough the spots look a little familiar, it started from the bottom. And for potassium def, from the pics ive seen it looks different, starting at the leave tips, first with yellowing. This time, the bottom fan leaves are unaffected. It also cant be anything light/heat stress related, the plants in the bigger pot are a little bit taller, nearer to the LED and show no sign of trouble. I really would appriciate some advice, sure its a common thing, im probably not doing things differently than other people.
what "riddles" me is that in the big pot, one of the 2 plants grew very good, its about twice the biomass and also the buds are larger, it sure has larger needs on nutrients, but it doesnt show any sign of deficiency. Could this be a hint that this has something to do with toxicity/nutrtient lockout etc? Just some ideas, i really have no idea.
i feel like this will affect the whole plant in a few days if im not acting quickly :(
i did turn down the light from 150w to 100w, with the idea to slow growth and metabolism down until i find a solution..probably a naive idea, but i dont know what else to do right now.
yours, mannitu
forgive me when not introducing myself, i will manage to do so later :). I just opened my tent and was surprised to see that even more leaves are affected now than yesterday. I bet you get a lot of posts from people that sound exactly like this, but i really have no other solution what to do. Ive used all information and websites to my best knowledge and abilities, but i havent been able to make sure what deficiency or other symptom is going on here. This is my 1st grow, i had 2 problems so far that i have been able to solve on my own, one was a phosphorus deficiency in mid veg, i tended to be a little to shy with fertilizers, second was a problem with chronic underwatering, i was too afraid to drown my plants, in the end one plant developed twisted and deformed leaves and some brown spots, mabye boron deficiency i thought. However ive been able to get rid of both things fast and succesfully, now after 3 weeks in flower trouble strikes again, hard and fast. I saw it on 1 or 2 leaves, didnt think much about it, now its 3 days later and i see about 10 leaves affected. I will try to give as much information as i can, i appriciate if you dont give any random ideas or what it could be, but only tell if it def. rings a bell and you know whats going on here. Im tired out after reading and watching videos, many with contradicting analazys and resumes.
I should say that i have 2 pots, 1 plant is in a 3 gallon pot, thats the one that is affected. 2 other plants are sharing a 4, gallon pot, they show no signs of problems, all are using same soil, watering, fertilzers concentration. The affected plant is a little smaller than the ones in the big pots, so it takes water and nutrients in slower than the big pot. i weigh the pots each day and it loses only about half the weight than the big pot with the 2 plants.
Time: 3 weeks into flowering 12/12
Symptom: leaves develope small, brown-rusty spots, together with some tiny green-yellowish discolouring, it starts from the inside of the leave, not the tips. Spots become necrotic and after a few days some leaves are totally dead and dried out and you could easily break them off. Upper leaves are affected, but not the small ones on the very top around the buds. Lots of leaves are showing first brown spots now.
medium: soil with 6,4ph, im watering with tapwater, a 2 component fertilizer and a small amount of calmag, always around ph 6, sometimes a little less or more.
Light, temp and enviroment: 20-24 degree celsius, im keeping the humidity under 60% now, most around 45-55%. Light is plenty, 150 watt LED panel for 2x2 feet.
Fertilizer: for the most time i used a simple 7-5-6 allround fertilizer from the supermarket and have to say i was pretty happy. Besides a small phosphorus def. in early stages..i doubled up the concentration t 4ml/l and everything run perfect. Then 3 weeks ago, i deceided to buy another fertilizers, because i read its a good idea to reduce Nitrogen. So i got myself a 2 component-mineral fertilzer with the NPK ratio 8-0-0 in bottle A and 0-4,2-16 in bottle B. Its also supposed to have all the other micronutrients for cannabis, at least it says so. Youre supposed to mix them up. Right now im using, per liter : 2ml of A, 4ml of B and 1ml of calmag (4%calcium/1%magnesium)
i tend to make a "light flush" about every 4 weeks, before watering i put about 1,5l tapwater, ph to 6,0, in the pots, then i water regular until it loses about the same amount of water at the bottom, just to flush out any possible amounts of dried salts at the bottom. Ive never been aggressiv with fertilizers, even now im just using 75% of recommendet dosage. I did check the runoff water one time, but ph was unspectacular, just over 6.0.
because of the nature of flowering, i did first suspect that this must be a phosphorus or potassium deficiency, because of elevated requirements in flower. I did however already have phosphorus def, at least im sure of that, allthough the spots look a little familiar, it started from the bottom. And for potassium def, from the pics ive seen it looks different, starting at the leave tips, first with yellowing. This time, the bottom fan leaves are unaffected. It also cant be anything light/heat stress related, the plants in the bigger pot are a little bit taller, nearer to the LED and show no sign of trouble. I really would appriciate some advice, sure its a common thing, im probably not doing things differently than other people.
what "riddles" me is that in the big pot, one of the 2 plants grew very good, its about twice the biomass and also the buds are larger, it sure has larger needs on nutrients, but it doesnt show any sign of deficiency. Could this be a hint that this has something to do with toxicity/nutrtient lockout etc? Just some ideas, i really have no idea.
i feel like this will affect the whole plant in a few days if im not acting quickly :(
i did turn down the light from 150w to 100w, with the idea to slow growth and metabolism down until i find a solution..probably a naive idea, but i dont know what else to do right now.
yours, mannitu
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