Can I ask how low your temperature gets during dark?Hey man thanks for checking in! Well I turned down two of the lights and that seemed to help quite a bit. They started perking back up. I also sprayed with Epsom salts and they looked better the next day. However there are still quite a few plants with the deficiency. I’ve been giving 150-200ppms of calmag, and about 100ppms of Epsom salt. Along with canna a b . Total 1.0ec. Twice everyday. It sounds like a lot of calmag to still be having a mag deficiency. I have one plant that is really bad and seems to be getting worse. Ph going in is 6.1-6.2 and runoff is 6.0. Here’s a few more pics
So I read through and if you have everything dialed in like you say up the feed to 800ppm on one affected plant and observe it; and see what the new growth doesIdk this is only my second grow. Is 580-600ppm too much for plants this size? They’re about a month old from clone.
I'm with Jimster, plus they're 1 month old clones. I'm using about that with coco on my 2 month olds. One month olds about a 1/6 less.Idk this is only my second grow. Is 580-600ppm too much for plants this size? They’re about a month old from clone.
Checking the runoff is a decent way to get a general idea of the soil Ph, although there are several factors that could skew the results. If you have a lot of nutrients in your medium, it can cause acidic readings that are more from the fertilizers than the actual soils. Differing levels of moisture in your growing container can also give inaccurate readings since nutes tend to concentrate at the bottom of the containers (if you are using non hydro). A slurry test is the preferred Ph measuring method, with samples taken from the root zone if possible. There is a phenom that combines the nitrogen source along with colder temps that induce the roots to affect the soil Ph directly, but unless you are seeing temps in the 40s, I doubt that it applies to your situation. I'm somewhat suprised that your Ph is so low, however, with the amount of Cal-Mag that you are using.i get that rootzone ph directly effects which nutrients can be taken up. What I am confused about is if that I’m checking my runoff and it’s 5.9-6.1 which in theory Is my actual rootzone ph than how could it be locking out nutrients. Unless measuring ph of runoff is not an accurate method.
I agree but I have a question Do you tho k the big LED in use requires the plant to use more calcium and or magnesium than normal lighting ?The epsom salts does the same thing as the Calmag, without the Calcium. Calmag can actually cause lockout problems if used too much... the Calcium tends to raise the Ph and if it gets too high it can cause lockouts. If you are using tap water, you might be getting enough magnesium from it alone, depending on your water qualities. Lockouts and the asociated Ph problems can be a real bugger to get figured out, since Ph swings can affect the availability of nutrients to the plants... so in addition to deficiencies caused by lockouts directly, deficiencies can also be caused by Ph issues, which can affect the lockout as well. It is a circle of problems that will drive you crazy chasing it down. This is the main reason I use Promix and low nutrient feedings as it avoids the overfeeding, which can cause Ph swings, which can cause lockouts, which can cause you to add more stuff into the mix and confusing things even more.
I hate to recommend things when there are so many possibilities as it is like throwing darts and hoping for a bullseye. My recommendation would be to try to flush out as much as possible to get to a neutral state and then feed a mid strength micro and macro nutrient fertilizer, with the idea being to get the growing medium back to near 6-7 Ph, then adding a small amount of broad spectrum nutrients and see how it responds. At least that is probably what I would do. I'm not too handy with PPM/EC readings and stuff, being old school in my growing philosophy. I've always grown with the "Less is better" school of thought and it has served me well over the decades while still getting good results. Plants take a ridiculously small amount of nutrients and it is way too easy to overfeed.