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@WhiteLight
I would turn your light back down. Even 400w is awfully strong for seedlings and I’d even raise the light to 36” or more. I start my seedlings under T5 bulbs and move them slowly to stronger light. Your problem COULD have been more of a lighting issue than anything. 400w is an enormous amount of light for a baby and 1000w is just too much, imo. I’m not expert enough to tell you for certain if your original issue is light related but I can tell you that starting with less light and gradually bringing it up will be better. Those little girls, especially after the stress of being flushed, do look a little small but not awful, by any means. Are you still seeing growth? The color looks pretty good to me. Especially given what they’ve been through. Sometimes seedlings are a little yellower in color and sometimes new growth with also have some slightly yellower coloring.
I’m sure Botanicare pH down is good stuff but I don’t know about using it for seedlings with that much phosphorous in it. I use organic Apple Cider Vinegar that still has the ‘mother” in it. The ‘mother’ is the bacteria that produces vinegar. Since it’s has a bacteria living in it, I do t worry about it having a negative impact on my microbe herd. I’ve gotten all off into the organic thing but the Apple Cider Vinegar (ACV) is cheap compared to lots of pH down products and it’s totally natural.
As a general rule, I don’t feed seedlings for a minimum of 2 weeks when I use a ‘light’ soil. When I am using some nutrient rich soil I don’t feed my plants until day 21-30. They just don’t need ANY food in the first 2 weeks and very little food for a week or two after that. I think people tend to overfeed plants which can cause symptoms that can look like deficiencies and/or CAUSE deficiencies from lockout or pH fluctuations that result from the over feeding.
FWIW - “calmag” is not a deficiency. It’s not even a ‘thing’ other than 2 micronutrients that many companies bottle together. “Cal” is calcium and “mag” is magnesium. They are very different and their deficiencies are very different. You will almost never have a deficiency of both - it’ll be either a calcium deficiency or a magnesium deficiency.
I would turn your light back down. Even 400w is awfully strong for seedlings and I’d even raise the light to 36” or more. I start my seedlings under T5 bulbs and move them slowly to stronger light. Your problem COULD have been more of a lighting issue than anything. 400w is an enormous amount of light for a baby and 1000w is just too much, imo. I’m not expert enough to tell you for certain if your original issue is light related but I can tell you that starting with less light and gradually bringing it up will be better. Those little girls, especially after the stress of being flushed, do look a little small but not awful, by any means. Are you still seeing growth? The color looks pretty good to me. Especially given what they’ve been through. Sometimes seedlings are a little yellower in color and sometimes new growth with also have some slightly yellower coloring.
I’m sure Botanicare pH down is good stuff but I don’t know about using it for seedlings with that much phosphorous in it. I use organic Apple Cider Vinegar that still has the ‘mother” in it. The ‘mother’ is the bacteria that produces vinegar. Since it’s has a bacteria living in it, I do t worry about it having a negative impact on my microbe herd. I’ve gotten all off into the organic thing but the Apple Cider Vinegar (ACV) is cheap compared to lots of pH down products and it’s totally natural.
As a general rule, I don’t feed seedlings for a minimum of 2 weeks when I use a ‘light’ soil. When I am using some nutrient rich soil I don’t feed my plants until day 21-30. They just don’t need ANY food in the first 2 weeks and very little food for a week or two after that. I think people tend to overfeed plants which can cause symptoms that can look like deficiencies and/or CAUSE deficiencies from lockout or pH fluctuations that result from the over feeding.
FWIW - “calmag” is not a deficiency. It’s not even a ‘thing’ other than 2 micronutrients that many companies bottle together. “Cal” is calcium and “mag” is magnesium. They are very different and their deficiencies are very different. You will almost never have a deficiency of both - it’ll be either a calcium deficiency or a magnesium deficiency.