Skunk Baxter
Well-Known Member
I feel like a total dweeb asking this, but I've never grown in coco before and I can't seem to be able to figure out what's happening. I'm getting a yellow mottling effect on many of the fan leaves, with the veins and edges generally a dark, healthy green, and yellowish mottling between the veins and the edges. I'm afraid it doesn't show up well with the flash, so maybe I need to take a couple of them outside and photograph them tomorrow.
I'm doing a SOG straight from seed (which I know is a pain in the ass even in the best of conditions), and that's probably part of what's happening here. The individual plants have different needs in terms of light, water, and nutrients, because many of them are at slightly different stages of their growth cycle. In some cases, I have 2 plants potted in the same pot, and there is a wide variance just between those 2 plants.
I'm using a 4.5x4.5 grow tent for this, with a 1000W Eye Hortilux Super HPS bulb. Temperature of the tent is high 70s Fahrenheit, lamp is about 18 inches above tallest plants. Plants are 3 weeks from sprouts as of yesterday, just entering their 4th week of growth. I started the germed seeds in rockwool cubes, and potted them in coco a week ago tonight.
I am using tap water, coming out of the tap at about 175 PPM. PH 7.5 out of the tap, but after I mix my nutes, I correct it. I tend to float my PH on hydro, anywhere from 5.5 to 6.2. This grow, most of the time I'm ranging between 5.7 and 6.0, but sometimes drift up or down a full .1 from that range.
For nutes, I am using Canna Coco A and B. Right about 650 PPM, so added to the 175 coming out of the tap, I'm at about 825 to maybe 850 PPM. I fed just once a day for the first 3 days in coco, because I was new to coco, and was afraid of drowning the root systems. Then I went to twice a day for 2 days, and have now gone to 3 times a day. At any rate, those are the only nutes I am using - I have not tried a calmag supplement yet.
What I'm getting looks like it could be nitrogen, magnesium, or sulphur deficiencies, but there are things about it that don't fit any of those deficiencies. I'm thinking that with 3 feedings a day - even light feedings - they should be getting enough nutes. I might suspect overfeeding, if it weren't for the fact that it was happening even when I was feeding once a day - and even skipped the first day after putting them into coco.
PH and TDS are both unchanged after flooding the tray and draining it back into the reservoir.
Other than this, the plants look fantastic. Good, strong, thick, healthy white roots are already exploding out the bottom holes of every pot, and they seem to be growing very well. Several seedlings that I didn't think were even going to live long enough to ever get their driver's licenses bounced right back as soon as I put them in coco, and a couple of them caught up so well they look as good as the ones that were fully healthy when I put them into their coco pots. It's just that damned leaf color.
What should I be looking at here?
I'm doing a SOG straight from seed (which I know is a pain in the ass even in the best of conditions), and that's probably part of what's happening here. The individual plants have different needs in terms of light, water, and nutrients, because many of them are at slightly different stages of their growth cycle. In some cases, I have 2 plants potted in the same pot, and there is a wide variance just between those 2 plants.
I'm using a 4.5x4.5 grow tent for this, with a 1000W Eye Hortilux Super HPS bulb. Temperature of the tent is high 70s Fahrenheit, lamp is about 18 inches above tallest plants. Plants are 3 weeks from sprouts as of yesterday, just entering their 4th week of growth. I started the germed seeds in rockwool cubes, and potted them in coco a week ago tonight.
I am using tap water, coming out of the tap at about 175 PPM. PH 7.5 out of the tap, but after I mix my nutes, I correct it. I tend to float my PH on hydro, anywhere from 5.5 to 6.2. This grow, most of the time I'm ranging between 5.7 and 6.0, but sometimes drift up or down a full .1 from that range.
For nutes, I am using Canna Coco A and B. Right about 650 PPM, so added to the 175 coming out of the tap, I'm at about 825 to maybe 850 PPM. I fed just once a day for the first 3 days in coco, because I was new to coco, and was afraid of drowning the root systems. Then I went to twice a day for 2 days, and have now gone to 3 times a day. At any rate, those are the only nutes I am using - I have not tried a calmag supplement yet.
What I'm getting looks like it could be nitrogen, magnesium, or sulphur deficiencies, but there are things about it that don't fit any of those deficiencies. I'm thinking that with 3 feedings a day - even light feedings - they should be getting enough nutes. I might suspect overfeeding, if it weren't for the fact that it was happening even when I was feeding once a day - and even skipped the first day after putting them into coco.
PH and TDS are both unchanged after flooding the tray and draining it back into the reservoir.
Other than this, the plants look fantastic. Good, strong, thick, healthy white roots are already exploding out the bottom holes of every pot, and they seem to be growing very well. Several seedlings that I didn't think were even going to live long enough to ever get their driver's licenses bounced right back as soon as I put them in coco, and a couple of them caught up so well they look as good as the ones that were fully healthy when I put them into their coco pots. It's just that damned leaf color.
What should I be looking at here?
Attachments
Last edited:
