Advanced Nutrients VS. Mega Crop

OldMedUser

Well-Known Member
I have been using megacrop now for my veg and am about 2 weeks away from flower but I am noticing some iron deficiency..I am going to grab some cal mag..but have you or anyone on here noticed that you need to use cal mag with some cultivers?
Are you sure it's low iron and not just lime-green centers from rapid growth? My plants are growing fast and they are all like that. 6 different strains. Takes a day or so for the chlorophyll to green up but it's a good sign and has nothing to do with iron.

:peace:
 

mr. childs

Well-Known Member
I have been using megacrop now for my veg and am about 2 weeks away from flower but I am noticing some iron deficiency..I am going to grab some cal mag..but have you or anyone on here noticed that you need to use cal mag with some cultivers?
both the new & old versions of megacrop i cut in half with epsom salt into upon arrival. mc is great but a local store near me was closing after 90 years of service & i bought enough jacks citrus to last quite awhile, so i wont be picking up anytime in the near future.
 

grilledcheese101

Well-Known Member
I just received a Mega Crop prize from @AquaTerra.

2kg of Mega Crop 2.0
1kg of Big Up 0-52-34 for early flower
1kg of Rock Steady 0-0-62 for late bloom
1kg of Carbo. Pure dextrose as far as I can tell. Tastes pretty sweet. :)

Going to use it on a couple of currently growing plants to see what happens but once I have some clones from the same mother in a couple weeks will do a little side-by-side with my usual AN nutes. Will be growing in ProMix HP that has a bit of composted manures, EWC and myco added.

I'm really impressed with all the goodies in the MC and printed out their flyer.

N,P and K are all 1% higher than MC 1.0
Mg up 0.1% from 2.3 - 2.4
S up 0.2% from 1.9 - 2.1
Everything else is the same.

You can print this full page greyscale and it's clear and easy to read. Colour if you want but I only have a monotone laser printer.

View attachment 4345051

I ran their calculator for 10L as that's a common measure for me to go by.

Grams per 10L PPM .5

Seedling/small plant 5.29 227

Normal Veg 10.58 555

Long Veg 11.90 625

Bloom Wk 1-2 13.23 695

Week 3-4 14.55 765

Wk5-Harvest 15.87 835

Calculator here. https://greenleafnutrients.com/feeding-calculator

They give away a 300g sample. Link at the top of their pages.

The NPK ratio of 10-7-18 is backwards to what I would normally want in veg at least but seems right for flower so I guess I'll find out how it works soon enough.

Never too old to try new things! Especially when they're free! :D

:peace:
I can assure you, you wont be dissapointed in the mega crop, the green terra additives are a real bonus tho, honestly no need to buy any nutes for a while. I have a fuckload of this stucff now lol.
 

Keesje

Well-Known Member
Going to use it on a couple of currently growing plants to see what happens but once I have some clones from the same mother in a couple weeks will do a little side-by-side with my usual AN nutes.
Will be nice.
Will you start a grow journal of this?
 

CoB_nUt

Well-Known Member
I have been using megacrop now for my veg and am about 2 weeks away from flower but I am noticing some iron deficiency..I am going to grab some cal mag..but have you or anyone on here noticed that you need to use cal mag with some cultivers?
Firstly,I am one of the belief that Cal-mag isn't the end all be all cure for mj plant issues, yet it has been hammered into our mj subconscious to "slap some cal-mag in their that'll fix it!"
IMO and IME it's either calcium or mag deficiency. Not both so why inundate your media and plants with both if only 1 is the issue,IF that's the issue?
Could simply be the wrong ph not allowing uptake of deficient nutrient/s.
Or the VPD needs adjusting.Or the roots aren't happy(ph)

I haven't had to add anything to my feed while running megacrop.Not that I'm a "master grower" by any means.IMO once you have your environment and lights dialed in,the plants will uptake what they need when they need it.MC has everything in it MY plants need.
However,I do run bennies and SST in a PPK system as well as Flood and Drain totes.
So,perhaps I'm just getting by with the automated consistent feedings.

Are you hand watering?
What type of lights are you using?
Media?
 

Keesje

Well-Known Member
I think you are right.
What many people forget when they switch for example from HPS to led, their whole VPD system changes with it.
Less radiation heat, so lower temperatures of the leaves.
Different environments can cause different uptakes of single elements.
So first you always have to look into that before making changes in your nutrients.
 

OldMedUser

Well-Known Member
Will be nice.
Will you start a grow journal of this?
Planning to. I've experimented with a lot of different nutes the last 20 years but AN has been my main one from 2001. Wasn't happy to see the pH Perfect come in at the time and didn't get any until it had been out for about 6 years or so but really like it now for ease of use. Never having to bother with pH is a blessing.

MC says it's pH stable so that will be one factor I'm going to assess for myself. I'm also getting into using organics in my usual soilless ProMix HP and MC should compliment that I hope. My plants are growing great right now but if they can grow even better I'm up for that.

I still have a couple years worth of the AN 3-part left but that can always go in the veggie garden. ;)

:peace:
 

hayshayshay

Well-Known Member
Firstly,I am one of the belief that Cal-mag isn't the end all be all cure for mj plant issues, yet it has been hammered into our mj subconscious to "slap some cal-mag in their that'll fix it!"
IMO and IME it's either calcium or mag deficiency. Not both so why inundate your media and plants with both if only 1 is the issue,IF that's the issue?
Could simply be the wrong ph not allowing uptake of deficient nutrient/s.
Or the VPD needs adjusting.Or the roots aren't happy(ph)

I haven't had to add anything to my feed while running megacrop.Not that I'm a "master grower" by any means.IMO once you have your environment and lights dialed in,the plants will uptake what they need when they need it.MC has everything in it MY plants need.
However,I do run bennies and SST in a PPK system as well as Flood and Drain totes.
So,perhaps I'm just getting by with the automated consistent feedings.

Are you hand watering?
What type of lights are you using?
Media?
I am using hp promix soiless substrate, pH is good at 6.2, i have 4 different cultivers going right now under 600watt MH in a 4x4x6' grow tent for veg. Purple kush, blue cookies, Bubba Kush and Chem dawg..but only the bluoe ookiesare having the issue..I will post some pics when I get home. I am a grower at one of the largest LPs in the world and haven't aeen this issue before..
 

CoB_nUt

Well-Known Member
I am using hp promix soiless substrate, pH is good at 6.2, i have 4 different cultivers going right now under 600watt MH in a 4x4x6' grow tent for veg. Purple kush, blue cookies, Bubba Kush and Chem dawg..but only the bluoe ookiesare having the issue..I will post some pics when I get home. I am a grower at one of the largest LPs in the world and haven't aeen this issue before..
Cool.Appears you have a finicky cultivar...the outlier.Everyone else getting the same feed are doing fine.
I do know Cal-mag won't fix an iron issue.Unless of course it has iron in it.I don't know as I've never purchased a cal-mag product.
Since you have experience in cultivation,take this with a grain of salt from a home grower.
I'd adjust that ph of that 1 cultivar up or down a tenth of a point.6.0 or 6.3.
I am in a soiless mix(not promix) it's perlite and calcined clay.I also use coco and perlite mix also.I let the ph drift thru the range since they get fed every day,well the ones that are handwatered do.The others get fed every two hours(ppk) and every 4 hours (flood & drain).

Also,I don't chase a ph number when adjusting my nute mix
If I'm aiming for 6.0 that day and it falls to 5.8 5.9 or 6.1 or 6.2, I leave it and adjust the other way the next feed...IF it doesn't hit my target.
No ph'ing up and down chasing a number for me.
 

CoB_nUt

Well-Known Member
I think you are right.
What many people forget when they switch for example from HPS to led, their whole VPD system changes with it.
Less radiation heat, so lower temperatures of the leaves.
Different environments can cause different uptakes of single elements.
So first you always have to look into that before making changes in your nutrients.
Agreed.If your nute regimen has all the goodies a plant needs and something is still amiss and the girls are unhappy,check other parameters before adjusting or should I say adding more nutes.
Environment plays a major role in indoor gardens.

If you have an outlier with all the essential
parameters in check...light,enviro,feed etc.Then it may be that one cultivar that has a finicky appetite.
Megacrop let's these outliers show themselves easily.Once the issue manifests,if it is deficient ot's just a matter of adjusting the feed strength.
 

hayshayshay

Well-Known Member
No it's not lol I know the difference I been growing for 15 years but I can understand what your saying


Are you sure it's low iron and not just lime-green centers from rapid growth? My plants are growing fast and they are all like that. 6 different strains. Takes a day or so for the chlorophyll to green up but it's a good sign and has nothing to do with iron.

:peace:
 

hayshayshay

Well-Known Member
They making any money yet? They'll never make a dime off of me but then I haven't had to buy pot for over 30 years so not starting now.

:peace:
We made 46 mil last quarter, and I totally agree with you. Why buy when you can grow your own the way YOU WANT and strains that you choose. Way more worth it in the end. When you buy you don't know what kind of issues the grower had.. deficiency to disease..from environment stresses to pests. Those are all variables you can contact your way, what you think it best. So why not grow your own?!
 

hayshayshay

Well-Known Member
20190605_165500.jpg 20190605_165517.jpg 20190605_165543.jpg 20190605_165556.jpg 20190605_165534.jpg 20190605_165524.jpg 20190605_165522.jpg 20190605_165530.jpg 20190605_165500.jpg 20190605_165517.jpg 20190605_165543.jpg 20190605_165556.jpg 20190605_165534.jpg 20190605_165524.jpg 20190605_165522.jpg 20190605_165530.jpg 20190605_165500.jpg 20190605_165517.jpg 20190605_165543.jpg 20190605_165556.jpg 20190605_165534.jpg 20190605_165524.jpg 20190605_165522.jpg 20190605_165530.jpg 20190605_165500.jpg 20190605_165500.jpg 20190605_165500.jpg
Cool.Appears you have a finicky cultivar...the outlier.Everyone else getting the same feed are doing fine.
I do know Cal-mag won't fix an iron issue.Unless of course it has iron in it.I don't know as I've never purchased a cal-mag product.
Since you have experience in cultivation,take this with a grain of salt from a home grower.
I'd adjust that ph of that 1 cultivar up or down a tenth of a point.6.0 or 6.3.
I am in a soiless mix(not promix) it's perlite and calcined clay.I also use coco and perlite mix also.I let the ph drift thru the range since they get fed every day,well the ones that are handwatered do.The others get fed every two hours(ppk) and every 4 hours (flood & drain).

Also,I don't chase a ph number when adjusting my nute mix
If I'm aiming for 6.0 that day and it falls to 5.8 5.9 or 6.1 or 6.2, I leave it and adjust the other way the next feed...IF it doesn't hit my target.
No ph'ing up and down chasing a number for me.
Yeah I been a home grower as well for 15 years, my first thought was PH, looks like it has some nutrient lock out maybe. Especially since the other cultivers arent experiencing the same issue. And yes cal mag is actually recommended for iron issues. But I tested PH it's been steady between 5.9-6.2 for past bit. Because I was going to try a quick flush but decided not to after triple checking PH. I also thought it could maybe be some heat stress or light burn but again only the Blue Cookies is suffering. As you can see In the pictures I am adding below, so it can't be that either. That's why I am thinking this particular strain has iron deficiency
 
Last edited:

OldMedUser

Well-Known Member
That does look nasty and the way the newest leaves are distorting looks like more than just iron not getting up there. Generally that's a pH issue causing multiple micro-nutrient lockout. Decent calmag has iron in it like the one I have. I don't recall ever having an iron issue on it's own the last 20 years but the memory ain't what it used to be either. ;)

I'd water it with pH 5 and knock the pH down a bit as it's generally high pH that causes lockouts like that.

Could be a genetic quirk too but most likely pH.

:peace:
 

homebrewer

Well-Known Member
Yeah I been a home grower as well for 15 years, my first thought was PH, looks like it has some nutrient lock out maybe. Especially since the other cultivers arent experiencing the same issue. And yes cal mag is actually recommended for iron issues. But I tested PH it's been steady between 5.9-6.2 for past bit. Because I was going to try a quick flush but decided not to after triple checking PH. I also thought it could maybe be some heat stress or light burn but again only the Blue Cookies is suffering. As you can see In the pictures I am adding below, so it can't be that either. That's why I am thinking this particular strain has iron deficiency
What EC are you feeding at?
 

Nizza

Well-Known Member
hey home brewer long time no see! its been a while and I'm back. Glad to see you're still on here. I may be doing a hempy sometime soon. havent gotten deep enough into organics yet~ great results with hempys!v

to OP
I am almost out of my supply of advances nutrienta 2 part Sensi Grow and my Bloom is already gone. But I am hearing good things about this Mega Crop nutes. I am in veg right now just startes some new babes..Blue Cookies, Purple Kush and Bruce Banner. They are being grown in Pro Mix. And will be needing nutes this week, they are in Veg cycle right now. Should I go for the Mega Crop or should I stay with Advanced Nutrients 2 part Sensi Grow A+B for veg cycle?? Or
are there better nutrients for me? This ir urgent plz help!!!!!

start from point A
PROMIX with additive sensi AN A+B

how many times watering? are you positive this isn't just a moisture infrequency if your PH and PPM are right?

when i used to do hydro another factor is airflow. Is something wierd happening....? somewhere maybe..?

runoff method 10% for me is crucial. If you don't understand that method~ inquire.

This covers root zone

light zone: are your lights properly hung?\


air zone: compensates both roots, foliage,and lights. engineer this so its easier for u. do not over transpirate the leaves
 

Nizza

Well-Known Member
Ph is obviously monitored so i left that out

oh yeah to OP , please add in a horizontal shot. also do it with flourescent lights preferably a mix of 3000+5000k or just 4000k

i would like to see your light distance, pot size, and total operation
 

hayshayshay

Well-Known Member
That does look nasty and the way the newest leaves are distorting looks like more than just iron not getting up there. Generally that's a pH issue causing multiple micro-nutrient lockout. Decent calmag has iron in it like the one I have. I don't recall ever having an iron issue on it's own the last 20 years but the memory ain't what it used to be either. ;)

I'd water it with pH 5 and knock the pH down a bit as it's generally high pH that causes lockouts like that.

Could be a genetic quirk too but most likely pH.

:peace:
Yeah, that was exactly my first thought was ahh PH is facked!!!! But after testing 3 times and getting 6.1 for PH I was like couldn't be PH. Maybe my digital PH Tester is broken or needs a recalibration. I am going to try the old litmus paper tonight and see what it has to say. But I think it looks like nutrient lock out personally..
 
Top