plantextractor
Member
I am growing four plants in a home grow. This is my first time ever growing cannabis myself, but I have worked in the industry on the post-processing, extraction, etc. side of things for some time now. I just flipped my plants to flower two weeks ago. The first week seemed fine, but this past week some of the leafs on the lower part of the plant started showing signs of potential deficiencies. Pretty quickly, the edges of a bunch of leafs on the lower part of my plants started curling downward, and the smallest leafs on some of the lower branches appeared very thin due to cupping, and would turn a greyish, dark color towards the base of the leafs before appearing to almost mush, and fall off. All of the other leafs up top look healthy for the most part, with a minor sign of nute burn on one, and another one only having some slight upwards cupping on the edges of some leafs.
I am growing with a 400W LED, in a 2x4x6 foot tent. One of my plants stretched higher than I'd like, and is closer to the light than i want but all four plants are experiencing similar issues so I don't know if that is the cause.
My medium is 70/30 coco coir/perlite, and the plants are each in 1 gallon fabric pots. I wish I had transplanted to 3 gallon bags 2 weeks prior to flip to flower, and flipped a week earlier, but I am still learning and now that they are in flower I don't know if I want to transplant as I have read that can make things worse.
I have temperature and humidity control through the outlet fan, and that sensor is up at foliage level in the center of the tent. I also have two monitors down below foliage level at the same area as the lowest part of the plants. the bottoms have been pruned to improve airflow. The temps on both top and bottom have stayed between 70-80 degrees C, and the humidity on the bottom is around 40-50% while the top humidity is a bit higher than i'd like, but still nothing crazy (55-58%).
I was feeding twice a day with 3/4 strength blue planet nutrient mix with micro, grow, and bloom + cal mag in water adjusted to a pH of 5.8. I very slowly started reducing relative quantities of Micro and cal mag (both containing nitrogen) after I flipped to flower, keeping Grow more or less the same, and increasing the Bloom. While problems were developing, the PPM of the mix was steadily below 1000 and at or below the nute mix PPM I have been feeding. Just today and yesterday, per the advice of a colleague, I started only watering once per day and I saw the PPMs go up noticeably, past the feed I am doing by a good bit. I am okay trading that for a weekly flush to remove salt buildup if that fixes the curling issue, as it was suggested to me that the issue could be daily overwatering. When I did switch to one feed per day, the medium was definitely alot dryer this morning than usual (measured by weight of bag) but still maintained moisture within, so at least I know that the plants are drinking.
I have attached a bunch of pictures below. If anyone is able to offer some friendly advice to this novice grower I would be much appreciated! I'm proud of the veg and want to see if I can salvage the flower! Pictures of general grow and some of the problem leafs and areas posted below.
I am growing with a 400W LED, in a 2x4x6 foot tent. One of my plants stretched higher than I'd like, and is closer to the light than i want but all four plants are experiencing similar issues so I don't know if that is the cause.
My medium is 70/30 coco coir/perlite, and the plants are each in 1 gallon fabric pots. I wish I had transplanted to 3 gallon bags 2 weeks prior to flip to flower, and flipped a week earlier, but I am still learning and now that they are in flower I don't know if I want to transplant as I have read that can make things worse.
I have temperature and humidity control through the outlet fan, and that sensor is up at foliage level in the center of the tent. I also have two monitors down below foliage level at the same area as the lowest part of the plants. the bottoms have been pruned to improve airflow. The temps on both top and bottom have stayed between 70-80 degrees C, and the humidity on the bottom is around 40-50% while the top humidity is a bit higher than i'd like, but still nothing crazy (55-58%).
I was feeding twice a day with 3/4 strength blue planet nutrient mix with micro, grow, and bloom + cal mag in water adjusted to a pH of 5.8. I very slowly started reducing relative quantities of Micro and cal mag (both containing nitrogen) after I flipped to flower, keeping Grow more or less the same, and increasing the Bloom. While problems were developing, the PPM of the mix was steadily below 1000 and at or below the nute mix PPM I have been feeding. Just today and yesterday, per the advice of a colleague, I started only watering once per day and I saw the PPMs go up noticeably, past the feed I am doing by a good bit. I am okay trading that for a weekly flush to remove salt buildup if that fixes the curling issue, as it was suggested to me that the issue could be daily overwatering. When I did switch to one feed per day, the medium was definitely alot dryer this morning than usual (measured by weight of bag) but still maintained moisture within, so at least I know that the plants are drinking.
I have attached a bunch of pictures below. If anyone is able to offer some friendly advice to this novice grower I would be much appreciated! I'm proud of the veg and want to see if I can salvage the flower! Pictures of general grow and some of the problem leafs and areas posted below.
I missed that when i typed it out lol!
. IfI had 2 plants instead of 4 do you think that might help the issue? I did measure the lumens with one of my coworkers and we were between 500-600 par but that was at canopy level with the light 24" above it. It's much closer now since the light can't go any higher
