Is this calcium deficiency?

[DeezBlunts]

My set up is 18x30x36 tent. Light is spider farmer sf1000d @18". 4" exhaust no filter. Passive intake. 1 gal. fabric pot with coco perlite mix(75/25). Temps have been 70-79 humidity 50-55. I water with a under the sink RO. Water by itself is 38ppms. I add 4 ml of floramicro, 5ml of floragrow, 1ml of florabloom, and 5ml of calmag to 1 gal of water. Ph to 6.0. After that is around 650 ppm. Just started to see this deficiency. I was thinking it was calcium. Any other thoughts and solutions? Thanks.

I think u should recheck ur ph needs. I’m growing in ff ocean forest and I ph to 6.2-6.8 and I go on the high end all the time like 6.75. Cuz at the roots acids build up dropping the ph at the rootball so u want to flush that and raise the ph so the roots can intake nutes. After u water, check the runoff ph. If it’s much lower than what ur adding in, that’s ur problem. I had a cal deficiency caused by nute lockout earlier in my grow and it looked like this :
Fixed with a flush, proper PHing and low (half) nute load.

 

[87swampthing]

Thanks for your responses people. Guess I need to change up my nute amounts. I was just worried about going with the GH feed chart just from what I have read online. Most of the places I have read online say that the GH feed charts are a little strong.

 

[Rurumo]

That is definitely too much calmag esp for those size plants, too much ppms in general. Sounds like you're on the right track now. I'd cut down or out the calmag, start feeding 400 ppms from the chart, or even lucas #s and see what happens. Maxibloom kiss method is what I use when I'm having problems with deficiencies and I don't know what is wrong because it always seems to clear any issues up-with no added calmag, but for me, just a small amount of epsom salts (due to my water.) So if you keep having problems and can't figure them out, get some Maxibloom and just feed that, 400 (up to 500 towards the end) ppm during veg and 600-700 ppms during flower. Feed twice per day. Good luck!

 

[Doug Dawson]

That is definitely too much calmag esp for those size plants, too much ppms in general. Sounds like you're on the right track now. I'd cut down or out the calmag, start feeding 400 ppms from the chart, or even lucas #s and see what happens. Maxibloom kiss method is what I use when I'm having problems with deficiencies and I don't know what is wrong because it always seems to clear any issues up-with no added calmag, but for me, just a small amount of epsom salts (due to my water.) So if you keep having problems and can't figure them out, get some Maxibloom and just feed that, 400 (up to 500 towards the end) ppm during veg and 600-700 ppms during flower. Feed twice per day. Good luck!

I would suggest he lower his calmag but not cut it out since he is using RO water and coco.

 

[Doug Dawson]

Thanks for your responses people. Guess I need to change up my nute amounts. I was just worried about going with the GH feed chart just from what I have read online. Most of the places I have read online say that the GH feed charts are a little strong.

As an example I am doing a grow journal to test a Mars Hydro grow kit. I dropped 2 auto's and have been following the feed chart exactly for this particular grow. I did add some Epsom salt but that's it. I am also using Coco/perlite. The plants broke the surface of the coco Feb 20th and look like this now. They seem to be handling the feeding quite fine. I have heard many say the chart is too strong which is why I am using it for this experiment. If these Auto's can take it I am sure almost anything can.

 

[TintEastwood]

Everyone can do "what if" recipes using the renfro spreadsheet.

Understanding and Calculating Nutrient PPM

Always good to give this thread another read. I have a question regarding NPK ratios and labeling. GH FLora Bloom is 0-5-4 with P2O5 and K2O. 0-2,15-3,3 is the with elemental P and K. Do you think of this nutrient as: 0-5-4 = 0-1,25-1 ratio or 0-2-3 = 0-1-1,5 ratio ?

www.rollitup.org

 

[twentyeight.threefive]

Everyone can do "what if" recipes using the renfro spreadsheet.

Understanding and Calculating Nutrient PPM

Always good to give this thread another read. I have a question regarding NPK ratios and labeling. GH FLora Bloom is 0-5-4 with P2O5 and K2O. 0-2,15-3,3 is the with elemental P and K. Do you think of this nutrient as: 0-5-4 = 0-1,25-1 ratio or 0-2-3 = 0-1-1,5 ratio ?

www.rollitup.org

I've tried to understand this many times over. I tried matching up a nutrient label to what he has in the table and never could get them to match. Perhaps I'm just too dumb.

Haven't seen a Renfro post in a while, hope he is doing well.

 

[Doug Dawson]

I've tried to understand this many times over. I tried matching up a nutrient label to what he has in the table and never could get them to match. Perhaps I'm just too dumb.

Haven't seen a Renfro post in a while, hope he is doing well.

You won't see him post here, his account was deleted at his request a while back.

 

[87swampthing]

Thanks again guys for the help. I just flushed with new feed water and will post some update pics in a few days. I have barney's farm runtz muffin, nirvana northern lights and candy land(can't remember the breeder right now)

 

[87swampthing]

Well the plants are looking a lot better. Filled up my 18x30 real quick. Moved them today to the 2x4, since I just chopped my last grow. Going to transplant soon to 3 gal. More training then flower.