Calcium deficiency? Advice needed

E

Efbespn

Member
How it RIU!
I got a problem that I'm not sure what to do. Through some research found that I may have a calcium deficiency. I'm in week 6 flower day 38.
Promix hp
Jacks Nutrients R.O formula 6.3g/gal
Power si bloom 1ml/gal
Impello tribus 1ml/gal
Electric sky es300 300w
Waterings at 5.8ph
Ppm @ 870-940

Any guidance is greatly appreciated.
 
jondamon

jondamon

Well-Known Member
Are you using any calcium nitrate?

@xtsho could you help with calcium nitrate information for this guy please?

Pics would definitely help to make sure it is a Ca deficiency you are seeing.
 
jondamon

jondamon

Well-Known Member
That’s an aggressive late stage Calcium deficiency.

have you been using any Calcium Nitrate with your JACKS?
 
xtsho

xtsho

Well-Known Member
What's been the total ppm of the nutrients you're feeding?


jondamon said:
Are you using any calcium nitrate?

@xtsho could you help with calcium nitrate information for this guy please?

Pics would definitely help to make sure it is a Ca deficiency you are seeing.
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They said they are using the RO formula which is 12-4-16 which has calcium nitrate in it. There is a feeding chart that shows that formula being used with other products. But looking at the ingredients and analysis on the label it has 7% calcium. Also, the feed chart shows that adding 630 grams of the 12-4-16 to 100 gallons of water is 200 ppm. So if they have been feeding 6.3 grams per gallon they have only been feeding 200 ppm of nutrients. The silica and tribus they've also been using are not going to do anything to make up for underfeeding.
 
jondamon

jondamon

Well-Known Member
xtsho said:
What's been the total ppm of the nutrients you're feeding?




They said they are using the RO formula which is 12-4-16 which has calcium nitrate in it. There is a feeding chart that shows that formula being used with other products. But looking at the ingredients and analysis on the label it has 7% calcium. Also, the feed chart shows that adding 630 grams of the 12-4-16 to 100 gallons of water is 200 ppm. So if they have been feeding 6.3 grams per gallon they have only been feeding 200 ppm of nutrients. The silica and tribus they've also been using are not going to do anything to make up for underfeeding.
Click to expand...
Bam! and that’s why I tagged you lol.
 
xtsho

xtsho

Well-Known Member
jondamon said:
Bam! and that’s why I tagged you lol.
Click to expand...
I'm just posting what I learned after a quick peek at that 12-4-16 RO formula. I'm not familiar with it but the ingredients and EC are available on Jacks website. If what the OP posted is accurate then according to Jack's chart they have been feeding only 200 ppm of nutrients in promix HP which is a peat based soilless media without any nutrients available to the plant like soil. That amount of nutrients is likely enough to keep the plants healthy in veg. Most people overfeed their plants. It's when the plants get further into flower and nutrient requirements go up significantly where the problems show up and it happens fast.

I know you know all of that but I thought it prudent to write it out for others. People need to understand what they're feeding and why. They also need to understand the nutrient requirements of their plants and be able to adjust their feeding as necessary.

It says on the label of the 12-4-16 what the EC/PPM will be with X amount per gallon.
 
jondamon

jondamon

Well-Known Member
xtsho said:
I'm just posting what I learned after a quick peek at that 12-4-16 RO formula. I'm not familiar with it but the ingredients and EC are available on Jacks website. If what the OP posted is accurate then according to Jack's chart they have been feeding only 200 ppm of nutrients in promix HP which is a peat based soilless media without any nutrients available to the plant like soil. That amount of nutrients is likely enough to keep the plants healthy in veg. Most people overfeed their plants. It's when the plants get further into flower and nutrient requirements go up significantly where the problems show up and it happens fast.

I know you know all of that but I thought it prudent to write it out for others. People need to understand what they're feeding and why. They also need to understand the nutrient requirements of their plants and be able to adjust their feeding as necessary.

It says on the label of the 12-4-16 what the EC/PPM will be with X amount per gallon.
Click to expand...
Thank you big man as always a font of knowledge when it comes to dry salts lol.
 
E

Efbespn

Member
xtsho said:
I'm just posting what I learned after a quick peek at that 12-4-16 RO formula. I'm not familiar with it but the ingredients and EC are available on Jacks website. If what the OP posted is accurate then according to Jack's chart they have been feeding only 200 ppm of nutrients in promix HP which is a peat based soilless media without any nutrients available to the plant like soil. That amount of nutrients is likely enough to keep the plants healthy in veg. Most people overfeed their plants. It's when the plants get further into flower and nutrient requirements go up significantly where the problems show up and it happens fast.

I know you know all of that but I thought it prudent to write it out for others. People need to understand what they're feeding and why. They also need to understand the nutrient requirements of their plants and be able to adjust their feeding as necessary.

It says on the label of the 12-4-16 what the EC/PPM will be with X amount per gallon.
Click to expand...

Thank you for getting at me. PPMs after mixing 6.3g of JACK'S RO and 1g of Epsom (Mag) per gallon usually comes out around 900 ppms on the ppm meter with an ec reading of 1.8.
 
E

Efbespn

Member
jondamon said:
That’s an aggressive late stage Calcium deficiency.

have you been using any Calcium Nitrate with your JACKS?
Click to expand...
No calnit necessary for the Jack's RO formula as it's already integrated into it. Only thing I add outside of jack's is Epsom salt. At 1g/gal.

Should I flush or water with just cal Mag on the next watering?
 
xtsho

xtsho

Well-Known Member
Efbespn said:
Thank you for getting at me. PPMs after mixing 6.3g of JACK'S RO and 1g of Epsom (Mag) per gallon usually comes out around 900 ppms on the ppm meter with an ec reading of 1.8.
Click to expand...
When I read the feed chart I didn't realize that the ppm they were referring to was just the amount of nitrogen and did not include the other elements.

I wouldn't flush or feed calmag only. There is no fixing those leaves and they'll likely get worse. I would just keep feeding and ride it out. Not really much you can do at this stage.








 
E

Efbespn

Member
xtsho said:
When I read the feed chart I didn't realize that the ppm they were referring to was just the amount of nitrogen and did not include the other elements.

I wouldn't flush or feed calmag only. There is no fixing those leaves and they'll likely get worse. I would just keep feeding and ride it out. Not really much you can do at this stage.








Click to expand...
Thank you loads for the help. Yeah I figured, kinda late for it. The other plants are starting to show signs not as bad as the one pictured. Should I ride them out too. I feel like I can still salvage them. Just don't know what to do.
 

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