This is my first time flowering in Coco and I am having difficulty with some of my plants.
My set-up is 3 x 1000 watt HPS in a 6' (w) x 14' (l) x 7' (h). The lights are air-cooled with an 8 in. in-line that runs from one end of the room to the other. The ducting is separate from the grow-room (i.e. the air that the in-line fan passes over the lights never leaks inside of the room). The room itself is a closed, air-tight environment, cooled with a 2-ton A/C. I am running CO2 (bottled) at 1250 - 1500 ppm.
Here is my situation. I had root aphids, so I treated my plants with MERIT 75 in veg. Whenever I do a root drench, I make sure that my plants have time to drain into a reservoir before putting them back in their trays. That way I do not risk letting them sit in runoff water. With MERIT 75, the recommended pH is 6.1. After using the MERIT, I went back to regular feeding. Regular feeding is nutes; nutes + CaMg+; molasses and beneficial bacteria; repeat; repeat; repeat...
I kept my plants in veg for a week after using MERIT 75, because Imidacloprid remains active in the plant for 60 days.
Before moving my plants into flower, I flushed all of them except for the ten plants that are now showing signs of deficiency and over-watering, and two other plants that are NOT showing signs of deficiency or over-watering.
My plants all looked fine and healthy prior to moving them into flower. Attached is a photo of them in flower on DAY 1.
Now I am on DAY 8 of flower. And here is a photo of the sick plants:
It may be difficult to see because of the lighting, but they are severely nitrogen deficient, and the leaves are cupping like I have seen in the past with over-watering. A few things: I didn't flush these plants prior to putting them into flower because I acquired them more recently than the others, and they were only in veg for about two weeks before making the transition.
I did a runoff test last week on the sick plants: pH in - 6.1; pH out - 6.8. My understanding is that a pH of 6.8 is too high for Coco. I waited several days, and this morning, now that the pots are lighter, I watered with nutes + CaMg+, pH 5.7, but only approximately 16-18 fl. oz., and they are in 3 gallon containers. My question is, am I taking the right steps to correct the problem? I have never flowered a plant in Coco before. This is my first run of it. Any advice is appreciated.
My set-up is 3 x 1000 watt HPS in a 6' (w) x 14' (l) x 7' (h). The lights are air-cooled with an 8 in. in-line that runs from one end of the room to the other. The ducting is separate from the grow-room (i.e. the air that the in-line fan passes over the lights never leaks inside of the room). The room itself is a closed, air-tight environment, cooled with a 2-ton A/C. I am running CO2 (bottled) at 1250 - 1500 ppm.
Here is my situation. I had root aphids, so I treated my plants with MERIT 75 in veg. Whenever I do a root drench, I make sure that my plants have time to drain into a reservoir before putting them back in their trays. That way I do not risk letting them sit in runoff water. With MERIT 75, the recommended pH is 6.1. After using the MERIT, I went back to regular feeding. Regular feeding is nutes; nutes + CaMg+; molasses and beneficial bacteria; repeat; repeat; repeat...
I kept my plants in veg for a week after using MERIT 75, because Imidacloprid remains active in the plant for 60 days.
Before moving my plants into flower, I flushed all of them except for the ten plants that are now showing signs of deficiency and over-watering, and two other plants that are NOT showing signs of deficiency or over-watering.
My plants all looked fine and healthy prior to moving them into flower. Attached is a photo of them in flower on DAY 1.
Now I am on DAY 8 of flower. And here is a photo of the sick plants:
It may be difficult to see because of the lighting, but they are severely nitrogen deficient, and the leaves are cupping like I have seen in the past with over-watering. A few things: I didn't flush these plants prior to putting them into flower because I acquired them more recently than the others, and they were only in veg for about two weeks before making the transition.
I did a runoff test last week on the sick plants: pH in - 6.1; pH out - 6.8. My understanding is that a pH of 6.8 is too high for Coco. I waited several days, and this morning, now that the pots are lighter, I watered with nutes + CaMg+, pH 5.7, but only approximately 16-18 fl. oz., and they are in 3 gallon containers. My question is, am I taking the right steps to correct the problem? I have never flowered a plant in Coco before. This is my first run of it. Any advice is appreciated.
