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Hello, I’m working on my first grow, and I’m having a chlorosis issue that’s getting pretty bad.
It’s currently week four of veg, and I’m pretty happy with the plants so far, other than the issue, and what seems to be some slow growth stemming from it. I’m growing one each of feminized Hindu Kush and Maui Waui from Nirvana seedbank. The pictures are all of the Hindu Kush, but both plants share identical symptoms.
Any input is much appreciated, I’m hoping to get these things straightened out asap so I can top them and move them to bigger pots.
Thanks
I figured it might be a magnesium problem, so I’ve been using calmag at 0.4EC in my nutrient solution for the past six days. The symptoms don’t seem to be getting better, if anything they’re slightly worse. Maybe the plants just need even more calmag? They both had slight calcium deficiencies that I was able to fix with a calmag foliar spray at the start of the grow, so I wouldn’t be too surprised if the problem was popping up again.I've never heard of chlorosis before but grow in coco using autopots. Cal/mag supplements are always part of a grow for me and I notice you mention a mag problem. Could it be as simple as adding some cal/mag supplement?
Interesting, I didn’t know that about megacrop and magnesium. Would you recommend stopping with the calmag and just doing the epsom salts and megacrop since I don’t seem to have a calcium deficiency? And do you add the salts to the water before or after you add megacrop?magnesium sulphate 1-2 g per gallon...
You are using bright leds and megacrop need added magnesium for led grows...
i used megacrop aswell adding epsom salts...good stuff!
Mix your megacrop then add 1 gram per gallon of magnesium sulfate (epsom salt)Interesting, I didn’t know that about megacrop and magnesium. Would you recommend stopping with the calmag and just doing the epsom salts and megacrop since I don’t seem to have a calcium deficiency? And do you add the salts to the water before or after you add megacrop?
Man, i was using generous amount of calmag togheter with the epsoms at 1g per gallon then bumped to 2 g per gallon and i finally saw disappear that intervenial clorosis....but i was running also Co2...Would you recommend stopping with the calmag and just doing the epsom salts and megacrop since I don’t seem to have a calcium deficiency? And do you add the salts to the water before or after you add megacrop?
With co2 you need to reduce humidity and increase ppm. What happens is the co2 increase the efficiency of photosynthesis by the plant so in turn it reduces transpirations rates... usually it's a transpiration thing when you run into especially a calcium issue.Man, i was using generous amount of calmag togheter with the epsoms at 1g per gallon then bumped to 2 g per gallon and i finally saw disappear that intervenial clorosis....but i was running also Co2...
Calcium is always needed dont worry, maybe just make sure the N levels dont skyrocket...check for clawings
Not sure if correct but i was dissolving first megacrop, then epsoms and then calmag....
I’ll mix in that order, and raise the light up. Thanks for the help.Mix your megacrop then add 1 gram per gallon of magnesium sulfate (epsom salt)
Back that light up to 30" at 40% which is your main issue here.
Very good info, thanks. Can you point me in the direction of any resources where I can learn more about ideal PPFD and DLI for different stages of a grow? I’m looking forward to trying out photone later.If you've got 320w light that close at that power level you are driving the plants very hard for their age, and potentially forcing them into nutrient deficiency through creating demand. About 30-36" for seedlings. Get a good PAR meter for your phone - if you have a recent model iPhone and download Photone, you now own a light meter that is as effective as you will ever need for your purposes. My friendly tip is there's no need to guess with your lights, just measure. Remember that little plants are a bit more sensitive so lower your lights slowly thru the grow, but above all measure actual PPFD at canopy height. You should still be at about 15-18 DLI on an 18 hour schedule from my limited knowledge, which will have you somewhere around 350 PPFD I think? This will stop forcing your plants to demand more nutes than you can give and should resolve it. I had the exact same on my grow and this was the issue. Good luck bro!
I found this article really helpful, and used the chart as a basic template for lighting curve across veg. Served me pretty well.I’ll mix in that order, and raise the light up. Thanks for the help.
Very good info, thanks. Can you point me in the direction of any resources where I can learn more about ideal PPFD and DLI for different stages of a grow? I’m looking forward to trying out photone later.
Thanks for the help guys, hopefully the plants will straighten out in the next few days once I make the suggested changes.
That was definitely a good read, I’ll adjust my lighting accordingly and see how things go. Thanks for the link.I found this article really helpful, and used the chart as a basic template for lighting curve across veg. Served me pretty well.
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In my opinion they’re ready for new pots, the drainage holes on the sides and bottoms of the current pots are full of roots, and they’re drying up a little more than I’d like between waterings. I’m just worried that a repot while they’re suffering from a deficiency might do more harm than good? Or do you think it might benefit them?Could they be ready for transplant to a bigger pot?
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