jojo677
Well-Known Member
Hello all!
I've been lurking for awhile and decided to do my first grow. However, as we all know that usually comes with problems...
Strain - Feminized Northern Lights, Feminized C99
# of Plants - 6 (3 of each strain)
Grow Type - Soiless
Grow Stage - Vegetative
Bucket Size - 3 Gallon
Lights - 1x 300W LED, Separate 104W 4100K Fluoro
Nutrients - Fox Farms
Medium - Soiless Mix (Homemade: ProMix, Pearlite, mushroom compost, with nutrient additives)
PPM - ?
PH - 6.5 - 7.0
RH - 35% to 50%
Room Temperature -75F constantly controlled
Solution Temperature -65 - 70F
Room Square Footage - 3' x 8'
Pests - None Known
Problem: My leaves are curling upwards and growth is very slow.
The leaves are giving the 'taco' curl upwards, as well as some leaves having the edges roll up. It seems there could be several possible issues from my research: heat stress, humidity issues, magnesium/calcium deficiency, too much direct wind, etc. My setup is as follows.
I started 3x Northern Lights on 11/18/14 under the 4100K Fluoro (not ideal I know). Started in Solo cups (no nutrients), upgraded to 1 gal pots (with homemade soiless mix), and finally 3 gallon pots (same mix). Growth looked pretty good, though slow. The larger plants you see in the picture are 2 months old! I put them under a cheap 300W Mars Hydro Light which draws 185W a few weeks ago, and growth has been slow since. I read that growth may be slowed when switching to LED, but I disregarded it. Then I saw curling and attributed it to Mg deficiency, as that was also somewhat correlated to LED use.
I have not fed these plants with any nutrients, other than what was in the soil. The only addition was epsom salt at 1tsp/gal, which I started several days ago, and added some hydrogen peroxide as I had watered not long before.
I also started 3x C99 plants on 12/7/14 and the two in 3 gal pots did well, but I over-fertilized the one in the 1 gallon pot and growth is finally catching up. These plants seemed to be growing quickly, but slowed recently, about the time the leaves started curling. I transplanted the two that were curling into 3 gal pots 3 days ago, and began LST. They were also moved under the 4100K Fluoro, as I would like to start flowering the plants which are under the LED, and keep these (as well as some clones) in Veg.
Some of the plants look like they may have a nitrogen deficiency, but I don't want to over-fertilize. I am also concerned about over-watering, as the pots have not been drying out very fast at all. It is possible I may have some root rot, I supppose, but dont' know how to check for that. I also have an oscillating fan in the room, but it blows over the tops of all plants, so I wouldn't think wind burn would be an issue.
Things I've changed since the curling began:
-Made a controller to keep a constant 75F all day. Should I try to lower this at night?
-The controller also runs a humidifier, with a shutoff at 50% RH. The whole growth has been at 35-50%, as it is winter here and hard to balance humidity/airflow.
-The controller also runs the vent fan for 1 minute every 5 minutes. This should give me a whole air exchange every 5 minutes. Is this good?
-Added a larger humidifier. I would think this would help, but who knows!
Below are the pictures. You can probably see the difference between the strains, but the NL pictures are first, with the younger C99 pictures being last.
Thanks for the help ahead of time!
I've been lurking for awhile and decided to do my first grow. However, as we all know that usually comes with problems...
Strain - Feminized Northern Lights, Feminized C99
# of Plants - 6 (3 of each strain)
Grow Type - Soiless
Grow Stage - Vegetative
Bucket Size - 3 Gallon
Lights - 1x 300W LED, Separate 104W 4100K Fluoro
Nutrients - Fox Farms
Medium - Soiless Mix (Homemade: ProMix, Pearlite, mushroom compost, with nutrient additives)
PPM - ?
PH - 6.5 - 7.0
RH - 35% to 50%
Room Temperature -75F constantly controlled
Solution Temperature -65 - 70F
Room Square Footage - 3' x 8'
Pests - None Known
Problem: My leaves are curling upwards and growth is very slow.
The leaves are giving the 'taco' curl upwards, as well as some leaves having the edges roll up. It seems there could be several possible issues from my research: heat stress, humidity issues, magnesium/calcium deficiency, too much direct wind, etc. My setup is as follows.
I started 3x Northern Lights on 11/18/14 under the 4100K Fluoro (not ideal I know). Started in Solo cups (no nutrients), upgraded to 1 gal pots (with homemade soiless mix), and finally 3 gallon pots (same mix). Growth looked pretty good, though slow. The larger plants you see in the picture are 2 months old! I put them under a cheap 300W Mars Hydro Light which draws 185W a few weeks ago, and growth has been slow since. I read that growth may be slowed when switching to LED, but I disregarded it. Then I saw curling and attributed it to Mg deficiency, as that was also somewhat correlated to LED use.
I have not fed these plants with any nutrients, other than what was in the soil. The only addition was epsom salt at 1tsp/gal, which I started several days ago, and added some hydrogen peroxide as I had watered not long before.
I also started 3x C99 plants on 12/7/14 and the two in 3 gal pots did well, but I over-fertilized the one in the 1 gallon pot and growth is finally catching up. These plants seemed to be growing quickly, but slowed recently, about the time the leaves started curling. I transplanted the two that were curling into 3 gal pots 3 days ago, and began LST. They were also moved under the 4100K Fluoro, as I would like to start flowering the plants which are under the LED, and keep these (as well as some clones) in Veg.
Some of the plants look like they may have a nitrogen deficiency, but I don't want to over-fertilize. I am also concerned about over-watering, as the pots have not been drying out very fast at all. It is possible I may have some root rot, I supppose, but dont' know how to check for that. I also have an oscillating fan in the room, but it blows over the tops of all plants, so I wouldn't think wind burn would be an issue.
Things I've changed since the curling began:
-Made a controller to keep a constant 75F all day. Should I try to lower this at night?
-The controller also runs a humidifier, with a shutoff at 50% RH. The whole growth has been at 35-50%, as it is winter here and hard to balance humidity/airflow.
-The controller also runs the vent fan for 1 minute every 5 minutes. This should give me a whole air exchange every 5 minutes. Is this good?
-Added a larger humidifier. I would think this would help, but who knows!
Below are the pictures. You can probably see the difference between the strains, but the NL pictures are first, with the younger C99 pictures being last.
Thanks for the help ahead of time!
