The Mega Crop Thread

[multiVortex]

So how much would you add in the gallon jug? I have some math to do.

Not really, but yes.

If using a gallon jug, you’re good. Why? MC is typically given in g/gal ratios. No math for a single gallon. Multiple gallons? grams/gal x num gallons.

I do highly recommend getting a scale that can measure in at least 1/10ths, if not 1/100ths of a gram. Should run about $15-$20, but will ensure the most accuracy possible for measuring.

When you get into 5gal buckets, I suggest you first measure 5gal of water into the bucket and mark it. I have a black bucket I use, and it will hold close to 6 gal to the rim. I have a white bucket that is almost to the rim at 5 gal.

Not hard to see that it can throw you off. I like the black one simply because it gives a little slosh room for using the drill paddle.

 

[732002]

So how much would you add in the gallon jug? I have some math to do.

Mix a gallon at 6G then dilute that as needed, 1:5, 1:2, 1:1, 2:1, 5:1

 

[bluter]

So how much would you add in the gallon jug? I have some math to do.

g/gal feed MC sched in here and on MC website.

explains why we use g/gal.

morning guys, welcome to

The Mega Crop Primer.... buried in the thread.... pt. 2

what media types is this stuff good for ?

the short answer is anything that you can stick a plant in. mega crop is a hydro nute - meaning it is for any media that you would normally need to supply all, or the majority, of the nutrients needed to support the plant.

there are very few media or growing styles that mega crop can not lend itself to. there are board members using it in:

passive hydro - like coco or hempy
soil-less soils - like hp pro-mix and sunshine #4
dwc - great big bubble bucket
rdwc - great big bubble bucket with auto water system.
flood and drain - hydro mimicking a rice paddy - just for you @Jack420 ...

mega crop can even be used to supplement organic, and living organic soil grows, without fear of disrupting the microbial content organics rely on. makes it a good idea to have on hand if your organics get hungry later in the grow.


that's great, this stuff is organic ?

no. mega crop is not organic, but it is friendly with organics.. mega crop is vegan, which has nothing to do with wispy environmentalist lettuce eaters in this context. vegan means living organic systems are able to feed off it without any special chemical assistance. it is the amino-chelation which allows this.

think of vegan as the neighbour in the building who lives across the hall from organic....



what's the feed schedule like ?

mega crop can be measured out and mixed several different ways. by volume - teaspoon / table spoon, by weight - grams per gal or litre, or by ec/ppm/tds.

by default this board and the thread uses weight - g / gal, as the preferred method. it gives the most consistent mix from feed to feed, and is the easiest for board members to understand when trying to advise other folk. you can choose other methods, but you may be on your own as far as what you are getting in the mix, and weight will be the easiest to get used to.

it is recommended to use a small digital scale that will measure tenths (.1) of a gram, or 100ths (.01) of a gram. the same type of scale your dealer used to use. you remember that guy.. don't worry the memory will fade now you don't need him ... the scales cost about $12.

mc mix 1.JPG

• bluter
• Nov 21, 2019

mega crop mix step 1

fancy mega crop equipment...


the good news is greenleaf has a feed calculator on the mega crop website which will do all the maths for you when it comes to feeding levels. the better news is you can trust it. unlike typical bottled nutes, you do not have to cut the dosage in half or less to avoid burning the plants, as is the norm with bottled nutes.

all you have to do is plug your numbers in and the calculator will return what you should feed based on plant stage, and whether you prefer metric (L) or ancient imperial measurements (US gal)...

for the purposes of discussion in this thread, everyone converts to g/gal so we are on the same page.... sigh...

this is the mega crop feed schedule for g/gal - taken right from the MC site...

veg 1 seedling / small plants - 2.0g / gal
veg 2 normal veg - 4.0g / gal
veg 3 extended veg - 4.5g / gal

flower wk 1 - 2 - 5.0g / gal
flower wk 3 - 4 - 5.5g / gal
flower wk 5 - harvest - 6.0g/ gal


the feed schedule is the same for all versions of mega crop across all media types.


the next few posts will deal with how to grow with MC, ph rules, and some of the (unnecessarily) controversial stuff...

but again for now ....

 

[Old Salt]

the safest course of action is to follow the ph rules for hydro as outlined by the chart.

Bingo!

 

[mkono87]

g/gal feed MC sched in here and on MC website.

explains why we use g/gal.

My thought process was premixing a solution so you don't have to do mix the dry everytime. But thinking more that might not make anything better.

 

[bluter]

My thought process was premixing a solution so you don't have to do mix the dry everytime. But thinking more that might not make anything better.

feed sched will give you the math for a premix.

best practice is mix full feed or gallon feed increments separately ahead of time. this will ensure an even mix and everything dissolved. more important for auto-feed systems and drippers than hand feeding.

 

[Old Salt]

GLN claims it can be mixed at up to 100 times its maximum concentration, so call it 600gm / US gallon. I don't know if anyone here has tried it at that high of a concentration. This would be used for nutrient injection systems.

I mix 18l at a time, which lasts for a week down to less than two days depending on the stage of growth and plant size. This has worked well for me. When asked, GLN stated that when mixed Mega Crop will last for weeks, if not months.

 

[bluter]

GLN claims it can be mixed at up to 100 times its maximum concentration, so call it 600gm / US gallon. I don't know if anyone here has tried it at that high of a concentration. This would be used for nutrient injection systems.

I mix 18l at a time, which lasts for a week down to less than two days depending on the stage of growth and plant size. This has worked well for me. When asked, GLN stated that when mixed Mega Crop will last for weeks, if not months.

i'm less forgiving than greenleaf.

those numbers are specifically for commercial applications. those applications are using equipment the home grower does not have access to.

for those reasons i feel a recommended premix concentrate for the home application would be less.

 

[multiVortex]

My thought process was premixing a solution so you don't have to do mix the dry everytime. But thinking more that might not make anything better.

With a premix at smaller levels, the only thing you have to watch out for is getting your ratios right. 4g/gal mixed with another gallon of water would make it 2g/gal (4g total put into 2gal of water), or 6g into 3 total, etc. In the early stages, I just mix it up a gallon (or two) at a time. Not like you're watering every day at that point.

GLN claims it can be mixed at up to 100 times its maximum concentration, so call it 600gm / US gallon. I don't know if anyone here has tried it at that high of a concentration. This would be used for nutrient injection systems.

600g/gal? Holy smokes!

The most I've done has been about 10x. I've mixed up 300g into a 5gal bucket, then mix that into the 50gal that is in my barrel. Thanks to the handy dandy drill paddle, I've not had precipitate issues.

But 600g/gal? That would be impressive. Damn impressive.

 

[Old Salt]

i'm less forgiving than greenleaf.

those numbers are specifically for commercial applications. those applications are using equipment the home grower does not have access to.

for those reasons i feel a recommended premix concentrate for the home application would be less.

Yes, it's for nutrient injection systems. There was some talk about reformulating Mega Crop into two parts, specifically for this purpose.

600g/gal? Holy smokes!

The most I've done has been about 10x. I've mixed up 300g into a 5gal bucket, then mix that into the 50gal that is in my barrel. Thanks to the handy dandy drill paddle, I've not had precipitate issues.

But 600g/gal? That would be impressive. Damn impressive.

I'm not about to try it. Well, maybe a cup of water with 37.5gm Mega Crop in it, just to say 'been there, done that.'

 

[multiVortex]

just to say 'been there, done that.'

 

[juststarting]

Ladies and gentlemen you've all convinced me to change everything I know about growing.
I've been trying to get into coco over a year now always folding back to soil.
I started reading this and other info on Mega Crop about 6 weeks ago.
First of March will be my new turn over to coco and mega Crop.
I will post when I start with weekly feedings.
Thanks everyone

 

[SauronBlue]

My journal is back from the dead, for those of you that visited. My plants absolutely love MC, especially with a dose of cal-mag thrown in! I've never had my plants green all through flower, but I'm really digging this. If anyone thinks they're feeding too heavily with this, or worried they will burn their plants, I'm feeding at 80g/5gal or about 2000ppm of just MC. I did manage to burn the tips a bit on them when I gave about 2500ppm (couldn't find my scale or tds meter, and tried to guess at how much mix to add). There was one sage grower on here who would always say to just add more MC to fix most problems, that has worked like a charm for me! My veg plants are still only liking about 1000ppm, but They'll get hungrier as they grow...

By the way, there's always been lots of talk about how ppl mix the MC to get it well dissolved, here's my method:
I use a 16-24oz drink bottle, like an arizona or sobe to premix, before pouring the good stuff into the 5gal carboy for storage/use. I find that the white chunks need a hard shaking to break up, and sitting around doesn't do much to get them gone, if you can't agitate them well (good luck shaking up a 5gal bottle hard enough to smash them). I fill the arizona bottle around half full of water, and since I'm mixing a whole 80g of MC, I only pour half of that powder in at once. I shake it until I can't hear the hard balls on the plastic anymore, then let it sit for a minute. i pour half of that off into the carboy(big water bottle), without disturbing the solids at the bottom, but it's not a very delicate process. I add a bit more water, and the rest of the powder to the small bottle, and shake again, until all is quiet inside. Most of you will probably be mixing much less powder than me, so you can cut out that second step. I pour the top half, or so, off again, and fill to about 3/4 full. I shake the hell out of it, and check what it looks like in there before adding it to the finished mix in the big bottle. If I feel like it, I'll pour off some, fill with more water, and shake some more, until I like the size of the particles left. By only pouring off the top, I only let what's actually dissolved into my final mix, so it hardly even needs a stir once it's all poured in.
I tried microwaving, letting it sit to dissolve, crushing the balls before mixing, paint mixer bits for my drill, everything I've read here, or could think of myself, and this is what I've stuck with. I hope it helps someone bc I took forever to write all that LMAO

 

[InTheShed]

@InTheShed does plenty of clones and would probably be a better resource

Thanks farside! @bluter if you can wait until I'm back in town on Tuesday I will grab the clone tutorial like for you. I'm close to 100% with this method but no way I can find it on my phone.

 

[Hydroholic]

My journal is back from the dead, for those of you that visited. My plants absolutely love MC, especially with a dose of cal-mag thrown in! I've never had my plants green all through flower, but I'm really digging this. If anyone thinks they're feeding too heavily with this, or worried they will burn their plants, I'm feeding at 80g/5gal or about 2000ppm of just MC. I did manage to burn the tips a bit on them when I gave about 2500ppm (couldn't find my scale or tds meter, and tried to guess at how much mix to add). There was one sage grower on here who would always say to just add more MC to fix most problems, that has worked like a charm for me! My veg plants are still only liking about 1000ppm, but They'll get hungrier as they grow...

By the way, there's always been lots of talk about how ppl mix the MC to get it well dissolved, here's my method:
I use a 16-24oz drink bottle, like an arizona or sobe to premix, before pouring the good stuff into the 5gal carboy for storage/use. I find that the white chunks need a hard shaking to break up, and sitting around doesn't do much to get them gone, if you can't agitate them well (good luck shaking up a 5gal bottle hard enough to smash them). I fill the arizona bottle around half full of water, and since I'm mixing a whole 80g of MC, I only pour half of that powder in at once. I shake it until I can't hear the hard balls on the plastic anymore, then let it sit for a minute. i pour half of that off into the carboy(big water bottle), without disturbing the solids at the bottom, but it's not a very delicate process. I add a bit more water, and the rest of the powder to the small bottle, and shake again, until all is quiet inside. Most of you will probably be mixing much less powder than me, so you can cut out that second step. I pour the top half, or so, off again, and fill to about 3/4 full. I shake the hell out of it, and check what it looks like in there before adding it to the finished mix in the big bottle. If I feel like it, I'll pour off some, fill with more water, and shake some more, until I like the size of the particles left. By only pouring off the top, I only let what's actually dissolved into my final mix, so it hardly even needs a stir once it's all poured in.
I tried microwaving, letting it sit to dissolve, crushing the balls before mixing, paint mixer bits for my drill, everything I've read here, or could think of myself, and this is what I've stuck with. I hope it helps someone bc I took forever to write all that LMAO

Ok so we discussed your numbers in your thread. Since you posted the numbers here I had to run a test. 80gm-5gl and you say 2000 ppm. This is my numbers.
well water-290 ppm
Added:80gm to 5 gallon
Total ppm:3280
I think you have scale issues or something. 16gm per gallon and plants are taking it?

 

[HigherTheHigh]

Has anyone tried the Sweet Candy from Greenleaf?

What's the full true purpose and will it help in the last two weeks with anything?

Thanks in advance.

 

[MrSauga]

I'm feeding at 80g/5gal or about 2000ppm of just MC.

Interesting... that's over 15g/gal. Careful!

 

[MegaBossMan]

My journal is back from the dead, for those of you that visited. My plants absolutely love MC, especially with a dose of cal-mag thrown in! I've never had my plants green all through flower, but I'm really digging this. If anyone thinks they're feeding too heavily with this, or worried they will burn their plants, I'm feeding at 80g/5gal or about 2000ppm of just MC. I did manage to burn the tips a bit on them when I gave about 2500ppm (couldn't find my scale or tds meter, and tried to guess at how much mix to add). There was one sage grower on here who would always say to just add more MC to fix most problems, that has worked like a charm for me! My veg plants are still only liking about 1000ppm, but They'll get hungrier as they grow...

By the way, there's always been lots of talk about how ppl mix the MC to get it well dissolved, here's my method:
I use a 16-24oz drink bottle, like an arizona or sobe to premix, before pouring the good stuff into the 5gal carboy for storage/use. I find that the white chunks need a hard shaking to break up, and sitting around doesn't do much to get them gone, if you can't agitate them well (good luck shaking up a 5gal bottle hard enough to smash them). I fill the arizona bottle around half full of water, and since I'm mixing a whole 80g of MC, I only pour half of that powder in at once. I shake it until I can't hear the hard balls on the plastic anymore, then let it sit for a minute. i pour half of that off into the carboy(big water bottle), without disturbing the solids at the bottom, but it's not a very delicate process. I add a bit more water, and the rest of the powder to the small bottle, and shake again, until all is quiet inside. Most of you will probably be mixing much less powder than me, so you can cut out that second step. I pour the top half, or so, off again, and fill to about 3/4 full. I shake the hell out of it, and check what it looks like in there before adding it to the finished mix in the big bottle. If I feel like it, I'll pour off some, fill with more water, and shake some more, until I like the size of the particles left. By only pouring off the top, I only let what's actually dissolved into my final mix, so it hardly even needs a stir once it's all poured in.
I tried microwaving, letting it sit to dissolve, crushing the balls before mixing, paint mixer bits for my drill, everything I've read here, or could think of myself, and this is what I've stuck with. I hope it helps someone bc I took forever to write all that LMAO

The highest dose my plants took was 9g/gal in flower. Got a little tip burn. Backed off to 8.5 and they were happy. I thought that was a lot. But, still saving money over other nutes.
I can't see how you could run 16g/gal!

 

[732002]

Two weeks ago I had dark green leafs and a little tip burn, a couple of leaves had some spotting.
This was after going about 6.5G, backed off to 3-4G and color has lightened up a lot but still some
rare spotting. Only a couple of leaves, top of canopy.


Maybe go to 5-6G MC and a touch of cal-mag?
6 week auto
76-78F
45-55 RH
LED
promix HD
Sick looking branch is from CS

 

[SauronBlue]

I wanted to quote people, but I have old quotes that I still might address, and as far as I can tell, you can't use some quotes, and leave the rest to address later. Once you insert quotes, you use or delete everything, and start fresh. I wish this was different.

As far as my measurements go, yes, Hydroholic, I was confused at first, because my ppm wasn't where I expected it to be, but I had just switched from tap to RO, and that must have contributed to the confusion. I'm not confused any more. I've measured and mixed these nutes many times in the past month, all consistent with those numbers. One thing I would point out, is that you are starting with well water at 290ppm, I'm starting with filtered reverse-osmosis water that ph's at 15-25ppm. Other than that, I'm not a bio-engineering scientist, I can't say why or how about anything, but my eyes and hands work just fine, and I know that when I put 80g of MC in 5gal of my water, it's gonna be around 2kppm.

Scale at zero


A nickel weighs exactly 5g, google it


Zeroed out with solo party cup on scale


Add 3 heaping teaspoons of MC


Pour into Arizona bottle to break up the balls/chunks
Note: I'm simply showing the bottle, and the little ridge around the bottom that I really like. since the lowest part is a thin bit around the edge, it's really easy to see even the smallest particles if you shake, then hold at an angle, to see what falls down the side and settles. I didn't actually mix up this batch, as I just watered last night, and see no reason to have it sitting around, mixed and getting light to feed algae.

My mix looks pretty dark in the carboy. This is some leftover from last night


Had to delete a couple extra pic of the cup of powder to show ppms of my water and final mix with cal-mag. I store water in 5gal and 1gal bottles for flexibility, but its all the same water



I wouldn't make up stories to be sensational, I'm not that needy of attention. I can't see where I'm making any mistakes, especially not over and over again. If you see where I'm screwing up, let me know.