Dialing In MEGA CROP for Auto's

[WildBill]

Ya know, a little molasses and Recharge works well at flower. Plants and bugs will be happy.
Tablespoon to the gal

 

[Mañ'O'Green]

There is not one answer to the calcium nitrogen question. First and foremost remember I grow Hydroponic not everything I say about MC applies to soil.

In order for calcium to be available in hydroponics it must be soluble. Things like Dolomite Lime, crab shell and gypsum will not work in hydro. They are absolutely great in soil.

In the past calcium nitrate in various strengths has been my best option but the problem is nitrate = Nitrogen when the calcium breaks off.

Because weights in fertilizer is often expressed GW/v or % of the weight of a liter they don't give us the strength in a volume of water in EC. This is the number we need to know to balance a fertilizer mix That is why I have the ION meters and have tested the EC/PPM.

So back to the Calcium in Cal-Mag many of the formulas out there are based on calcium nitrate as the source of calcium it is going to have a lot of nitrogen no matter what they say on the bottle. Remember they only need to state a minimum on the label.

Then there are other chemical sources for Calcium and the N content goes down but they are not as effective in Hydro.

TSP says it is highly available. We shall see.

That said there are a lot of sources for calcium in soil that has none or very little N.

I am pretty high does that make sense to you guys.

 

[chuckeye]

Some of you with high ppm well water might find this interesting.

Mine is ~500. I wasn't sure how this would affect the MC recommended feeding rates.

I'm using ProMix HP in 3 gallon fabric bags with a 600w MH/HPS (parabolic reflector) in a cobbled together 4 x 4 x 4 high enclosure inside a 10 x 10 room

Seeds from autoflower dot ca, 2x Gelato, a King Gelato, Gorilla Glue #4 and a Purple Silverback.

My bale of ProMix HP was at least eight months old and when I opened it I wasn't surprised to find it was quite dry.

I pre wet it with 1 g of MC in 2.5 L of ph'ed water. 650 ppm.

Seeds were germinated fully in distilled water. 36 hours later tap roots ranging from 1/8" to 1/2".

BTW > seeds were not impressive, small and green. No mottling at all. But they all popped.

Into yogurt containers and under an 85 CFL bulb.

Slowly increased to 740 ppm. My "grow" room was in use until transplant at about three weeks, sigh...

Past time too, roots were spiraling on the bottom of the containers.

My last watering two days ago was at their recommended 2.65 g for 2.5 L of water.

I've noticed a general greening up and five days past transplant the expected vigorous growth.

This is today watering with the recommended amount. Day 30.

Back two are the Gelato's, left front is the King Gelato which I topped, right front is Gorilla Glue #4 and the middle is the baby Purple Silverback.

I'm almost starting to think she was hungry. She is the only one with yellow bottom leaves.

Front two are ~ 10" high.

For now I am going to continue with their feeding schedule..

Cheers

 

[Lil Dab]

There is not one answer to the calcium nitrogen question. First and foremost remember I grow Hydroponic not everything I say about MC applies to soil.

In order for calcium to be available in hydroponics it must be soluble. Things like Dolomite Lime, crab shell and gypsum will not work in hydro. They are absolutely great in soil.

In the past calcium nitrate in various strengths has been my best option but the problem is nitrate = Nitrogen when the calcium breaks off.

Because weights in fertilizer is often expressed GW/v or % of the weight of a liter they don't give us the strength in a volume of water in EC. This is the number we need to know to balance a fertilizer mix That is why I have the ION meters and have tested the EC/PPM.

So back to the Calcium in Cal-Mag many of the formulas out there are based on calcium nitrate as the source of calcium it is going to have a lot of nitrogen no matter what they say on the bottle. Remember they only need to state a minimum on the label.

Then there are other chemical sources for Calcium and the N content goes down but they are not as effective in Hydro.

TSP says it is highly available. We shall see.

That said there are a lot of sources for calcium in soil that has none or very little N.

I am pretty high does that make sense to you guys.

Makes as much sense as it can to a simple stoner like me. Also some one like me that probably shouldn’t have choose a hydroponics setup. MOG’s calculator takes the guess work out of it.

we shall see together @Mañ'O'Green my bottle of tps oac calmag should be here today. Hopefully it solves my issue trying to use MC in coco with RO water.
Thank you for all your hard work putting this calculator together for us!!

 

[4d-Rock]

all I can say is, this plant was grown in a 3 gallon pot of organic soil, my blend, and given only RO water with an average of 100 ppms of cal/mag @6.4 PH. Ths pic was taken just before chop, I believe it was day 94.

This is the kind of results I’ve aspired to replicate. Unfortunately in the 5+ years growing I’ve yet to produce anything close. I’ve gotten better, sure, but don’t know why it eludes me so. I also haven’t tried much beyond Fox farms or MC though.
Even with my recent grow (albeit I’m trying something new, running blumats) I’m at about day 34, and this is where things typically start to fall apart.

Very droopy and starting to see lightening of leaves and spots developing. PH is all good, i think i had the blumats set too high as well causing overwatering a bit. Top feeds once a week at about 550ppms.

Dunno, going to get the moisture under control and see what happens

 

[Orion]

This is the kind of results I’ve aspired to replicate. Unfortunately in the 5+ years growing I’ve yet to produce anything close. I’ve gotten better, sure, but don’t know why it eludes me so. I also haven’t tried much beyond Fox farms or MC though.
Even with my recent grow (albeit I’m trying something new, running blumats) I’m at about day 34, and this is where things typically start to fall apart.
View attachment 1417286
View attachment 1417285
View attachment 1417287
Very droopy and starting to see lightening of leaves and spots developing. PH is all good, i think i had the blumats set too high as well causing overwatering a bit. Top feeds once a week at about 550ppms.

Dunno, going to get the moisture under control and see what happens

Have you try another medium? Big yield from hydro.

 

[pop22]

What is the PH of your solution? Have to tested runoff PH? Are you using any additives? I see clawing on your leaves, a sign of nutrient toxicity and/or lockout. And with the whole plant going yellow, that's N lockout. I'd do a runoff test and see where your medium PH is.
What medium are you growing in?

This is the kind of results I’ve aspired to replicate. Unfortunately in the 5+ years growing I’ve yet to produce anything close. I’ve gotten better, sure, but don’t know why it eludes me so. I also haven’t tried much beyond Fox farms or MC though.
Even with my recent grow (albeit I’m trying something new, running blumats) I’m at about day 34, and this is where things typically start to fall apart.
View attachment 1417286
View attachment 1417285
View attachment 1417287
Very droopy and starting to see lightening of leaves and spots developing. PH is all good, i think i had the blumats set too high as well causing overwatering a bit. Top feeds once a week at about 550ppms.

Dunno, going to get the moisture under control and see what happens

 

[4d-Rock]

@Orion i tried Coco once not long after I started growing but ran into some issues pretty quickly, went back to what I’m using now, which is Pro-Mix HP peat based medium.
Funny enough, I ordered a bag of coco to try on my next run. Never heard of the brand before, but it’s all I could get locally. It’s called Mo’ Koko.

@pop22 I agree that It kinda looks like lockout. The reservoir for the blumats is just plain water (ppm) that I keep between 6.1-6.4. The top feeds have been around 500-600ppm since I moved to full strength, ph’d to the same range. I got a bit of tip burn at the higher end and brought it down a bit.
I’m using a mix of 4.5g/gal MC v2 1-part, 1g/gal Sweet Candy, and 0.5mL/L CaliMagic, which I then dilute to the desired ppm. I posted the elemental calculation a few pages ago which showed a good nutrient balance. However, if I’m reading what @Mañ'O'Green wrote on his last post about supplements is correct, I may be wrong to assume I can use the numbers on the CaliMagic bottle (1%N, 5%Ca, 1.5%Mg) to calculate it the way I did.

Anywho, I haven’t tested runoff because the Blumats don’t produce any, though the feeds have had a bit as I fed until I got a bit of runoff . I have the soil probe for my Apera PH60 so I recently tested when I noticed things were slowing down. All places in both pots tested between 6.1 - 6.3. Also, day temps are 25-26C,night cools to about 19-20. RH consistently 55-65.

Was thinking of doing a mini-flush of sorts and Finish with a moderate feed.

 

[pop22]

There is absolutely no reson to add calmag to Megacrop unless it is the Version one. There is plenty of both and adding more is asking for lockout.

Nor is there really any need for the Sweet Candy. Greenleaf even tells you this! Yes they sell it, because people don't listen even to the people who make the nutrient. More often than not, people having issues with MC are using additives of one kind or another. I've been using MC since V1 and was one of the first here to use it, and I'll say it again from experience, no additives needed!
I'm of the opinion that PH soil probes won't tell the same story as a runoff test. A runoff test will also tell you id you have a build up of nutrient in your medium, which now seems likely as the signs of toxicity are obvious, and at a 550 ppm average, should not be an issue with most strains

.I suggest the first thing to do is stop the added calmag, it's doing nothing for your plants and could even be part of the problem.

@Orion i tried Coco once not long after I started growing but ran into some issues pretty quickly, went back to what I’m using now, which is Pro-Mix HP peat based medium.
Funny enough, I ordered a bag of coco to try on my next run. Never heard of the brand before, but it’s all I could get locally. It’s called Mo’ Koko.

@pop22 I agree that It kinda looks like lockout. The reservoir for the blumats is just plain water (ppm) that I keep between 6.1-6.4. The top feeds have been around 500-600ppm since I moved to full strength, ph’d to the same range. I got a bit of tip burn at the higher end and brought it down a bit.
I’m using a mix of 4.5g/gal MC v2 1-part, 1g/gal Sweet Candy, and 0.5mL/L CaliMagic, which I then dilute to the desired ppm. I posted the elemental calculation a few pages ago which showed a good nutrient balance. However, if I’m reading what @Mañ'O'Green wrote on his last post about supplements is correct, I may be wrong to assume I can use the numbers on the CaliMagic bottle (1%N, 5%Ca, 1.5%Mg) to calculate it the way I did.

Anywho, I haven’t tested runoff because the Blumats don’t produce any, though the feeds have had a bit as I fed until I got a bit of runoff . I have the soil probe for my Apera PH60 so I recently tested when I noticed things were slowing down. All places in both pots tested between 6.1 - 6.3. Also, day temps are 25-26C,night cools to about 19-20. RH consistently 55-65.

Was thinking of doing a mini-flush of sorts and Finish with a moderate feed.

 

[CannabisMingus]

There is absolutely no reson to add calmag to Megacrop unless it is the Version one. There is plenty of both and adding more is asking for lockout.

@pop22 soil or hydro or both?