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Calcium deficiency impossible to fix.

Coughy
Coughystarted grow question 4 years ago
I cannot get ahead of calcium deficiency in spite of adding calcium nitrate base with extra cal-mag daily. I just keeps getting worse and worse... any advice? Hydroponic RDWC, day 29 flower. Itโ€™s fine in veg, once they hit bloom, canโ€™t keep them healthy.
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Week 17
Feeding. Deficiences
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NobodysBuds
NobodysBudsanswered grow question 4 years ago
I don't know... looks like you add plenty of nutes. You use calcium-nitrate, no way it's a calcium deficiency. That'd be dfiicult to do. Also, Ca problems take months to display... so relieving it may take time too? not sure on that part but the rest i am pretty confident about. Just because it doesn't react immediately doesn't mean it's not improving in some contexts. don't let that cause you to do more stuff that isn't directly related. you could be locking Ca out. your mag-suflate (not likely mL/gal? if so, need molarity to dose correctly) looks extremely high, which high Mg concentrations would lock out Ca. 1 gram per gallon of dry foodgrade cheap epsom salt (mag sulfate) is all you need... 11mL or ~11g would be a huge overdose if fed each time that way Assumes pH and total dissolved solutes aren't out of whack. the whole idea that bloom requires more of this and less of that is not proven anywhere. Stick to a healthy ratio of each at a proper concentration and pH. You see a white paper with suitable sample size, methodology and equipment listed along with conclusions and questions, i.e. a proper study, then you can think about changing up nutes for vege and bloom. Take that with a grain of salt too, since 90% of all initial scientific studies are later proven false. there's a reason why anecdotal evidence is a logical fallacy. You have 4 weeks left or so? ease back a bit. it's almost certainly lockout. hit the reset button and give it a little time.
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Experimentgreen
Experimentgreenanswered grow question 4 years ago
Hello, I'm a soil grower so i can't give perfect advice....but i had a huge calcium problem with 1 plant and it was 2 things...needed higher doses and also lower potassium levels. Also would it be a possibility to raise your ph slightly? Maybe 6.1? Calcium usually is taken in best around 6.2, i know with hydro you want the ph low...but just a possiblity. Good luck. โœŒ๏ธ
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MadeInGermany
MadeInGermanyanswered grow question 4 years ago
Hi buddy i don't understand the problem? your plants all look great ๐Ÿ˜๐Ÿ‘ keep it up
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Jef79
Jef79answered grow question 4 years ago
Hello.. Hope you are well.. Ur plants look great despite her problems.. Personally,i dont think u have calcium deficiency.. I just looked at ur nutes, have u simply tried to raise ur phosphorus and potassium levels.. She will b needing these alot more now she's in full flowering mode.. Also i noticed u add hydrogen peroxide.. Is this to add oxygen or keep nasties in res down(or both) .. If ur using airstones(i presume u are) id consider taking out the peroxide and replacing it with silicon.. A mixture of this and upping ur nutes like i suggested (maybe to at least 11-1300ppm)shud also help keep her leaves greener for longer.. U got big plants n they need alot of food for production now.. Im usually hitting 12-1300ppm at wk 5/6 of bloom in nft (pending on strains).. Stay safe n gud luck with her around harvest time..๐Ÿ‘๐Ÿ€
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