GH Maxi series question?

[Chuckeye]

(Cross posted from my current grow journal with a recap)

This is a close up of the top of a Green Crack photo. Day 35.

She was started in a single serving yogurt container under a 85w CFL bulb for 19 days and transplanted into a 3 gallon fabric pot of ProMix Hp.

Under a 600w MH light in a 42" parabolic reflector, roughly 4' x 4' enclosure.

I fed her 1.6g of MaxiGro in 3L of water two days ago.

Medium feed schedule says 3g/gallon for early veg. I gave the equivalent of 2.1g/gallon.

I was looking for how much is too much and although this isn't a typical nutrient burn it sure isn't vigorous growth ?

Perhaps someone familiar with the Maxi series can comment ?

Cheers

 

[TorturedSoul]

MaxiGro or MaxiBloom? What is your water source, and what is its pH? Is the Maxi completely dissolving each time when you add it to the water? What pH are you adjusting your nutrient solution to?

You are on an 18 hours on lighting schedule?

 

[Chuckeye]

MaxiGro or MaxiBloom? What is your water source, and what is its pH? Is the Maxi completely dissolving each time when you add it to the water? What pH are you adjusting your nutrient solution to?

You are on an 18 hours on lighting schedule?

MaxiGro, well water ph in the mid 7's, no adjustment.

ProMix HP and the Maxi series are ph buffered.

18/6 and yes it is completely dissolved.

Cheers

 

[Chuckeye]

Just to close this off, day 37.

I may have been borderline on the feeding but she is starting to look normal again

She may need watering later today, I will up the amount of water to 3L with the same ratio of MaxGro as last time !

Cheers

 

[TorturedSoul]

ProMix HP and the Maxi series are ph buffered.

Nothing lasts forever. For years, some people have found it useful to add lime to ProMix products, especially if the plant will be in it for a while.

Which is not necessarily your issue, of course. It would depend on things such as the total alkalinity of your water, how much dolomite lime was added to it at the factory, how many months the plant has been growing in the container, whether the peat content (which is most of it) has begun to break down, whether you've begun to get an accumulation of certain elements in it from your feeding schedule/amounts, et cetera.

 

[Roy Growin]

My Green Crack grew spears in flower
I would be considering the top two l/r fan leaves off to help the lower buds and get a slightly more even canopy

 

[ReservoirDog]

My maxi exp. with closet tomatoes, by which I actually mean tomatoes in a closet, in peat/perlite and now with cannabis is that near-burns took on a brownish hue if not strong enough to cause necrosis but near-nuff. I used tap water 0-10 ppm, ph 7 (I'm a lucky so and so, I know) with .5 g NPK brand calmag dry mix, and could never get close to useing close to the full dose either maxigrow or maxibloom. When I exp'd with maxigrow in DWC found was not rock stable ph compared to Jack's or MC 2 part and kinda strong. MC 2 part am currently using in peat 6040 perlite SIPs. Going to sub your grow. Cheers.

 

[Chuckeye]

Nothing lasts forever. For years, some people have found it useful to add lime to ProMix products, especially if the plant will be in it for a while.

Which is not necessarily your issue, of course. It would depend on things such as the total alkalinity of your water, how much dolomite lime was added to it at the factory, how many months the plant has been growing in the container, whether the peat content (which is most of it) has begun to break down, whether you've begun to get an accumulation of certain elements in it from your feeding schedule/amounts, et cetera.

At this stage I wouldn't think ph is an issue.

Geez, forgot to mention. My well water ranges in ppm from 450-500, depending on the season.

My last grow of autos had No ph adjustments after day 30 !

Grow went from 96 - 122 days with no issues, that I didn't cause

Cheers

 

[Chuckeye]

My Green Crack grew spears in flower
I would be considering the top two l/r fan leaves off to help the lower buds and get a slightly more even canopy

She is a photo period girl and I'm planning to veg to ~ day 50. Lots of grow time yet....

Some leaf tucking maybe but I think it's too early to be losing fan leaves.

Their role as a solar panel is more important to me, for now. A couple of days of shade while the plant grows out is minor.

You would probably go crazy with this Lambs Bread

She is going to need some serious leaf tucking tonight !

Cheers

 

[Chuckeye]

My maxi exp. with closet tomatoes, by which I actually mean tomatoes in a closet, in peat/perlite and now with cannabis is that near-burns took on a brownish hue if not strong enough to cause necrosis but near-nuff. I used tap water 0-10 ppm, ph 7 (I'm a lucky so and so, I know) with .5 g NPK brand calmag dry mix, and could never get close to useing close to the full dose either maxigrow or maxibloom. When I exp'd with maxigrow in DWC found was not rock stable ph compared to Jack's or MC 2 part and kinda strong. MC 2 part am currently using in peat 6040 perlite SIPs. Going to sub your grow. Cheers.

Good to have you along for the ride !

My well water is what Most would consider, uh, lets just say Bad Water

But I don't have to use Cal/Mag and the plants seem to be okay with it....

The Maxi series feeding schedule unfortunately only lists one weight value per growth stage.

So (as with any other nutrient I've used) the first month or so is dialing in the right amount and the ppm reading is valuable finding this grams/litre amount.

I start my seedlings @600 and slowly increase to No more than 1000. Bad Stuff happens after that

With AN, four waterings @1250 per day in a 2 gallon plastic pot seemed fine, on the fifth within hours all the tips of the fan leaves and some sugar leaves were burnt toast... Flushed, backed off to 950, disaster averted !

With MC two of my girls received the addition of 1g/4L of Bud Explosion.

The result was the new growth was light green and the leaves were actually corkscrewed. Not leaf tip necrosis which I am familiar with, he, he.... Just gotta find that line

IIRC the ppm was 950 @ day 60. Quit the BE and things returned to normal in a week.

Read the directions, uh huh. Subtract the amount of added BE from the amount of MC and start using After the first week of flower. The other two girls that were farther along in flowering didn't miss a beat.

I didn't record the ppm value so chances are I did not take a reading, sigh....

Now for MaxiGro, my little girl was originally on MC and on the upper side of green.

She was topped a little early and a bit close, pretty sure she had only received two feedings with MaxiGro at this point.

Slower growth that the rest of the girls and one of the new leaf tips had ruffled edges, again no necrosis ?

Not sure I want to go farther and Really find out what over feeding with MaxiGro/Bloom looks like

Cheers

 

[Chuckeye]

Or perhaps a simple case of light stress ? So delicate

Her other tops are definitely Not growing up to the light.

No one else is complaining though !

She's a good six inches shorter than the rest of her roommates.....

To be safe I am going to consider her as a canary in a coal mine. Light is 100% @ ~24".

Raise it 6" and observe.

Cheers

 

[Chuckeye]

Just a FYI >

This morning fifteen minutes after lights on her tops were all stretching as they should be !

I gave her the same 1.6g of MaxiGro but in 4L of water. PPM was 605, ph was 7.0

Cheers

 

[ReservoirDog]

With light levels and feed being so closely linked I think your canary thoughts make good sense. Also, considering how much the lights off period appeared to reset her disposition it seems a reasonable line of inquiry that possibly now has another piece of supporting evidence.

I'm not an experienced cannabis/nute whisperer so I can only observe and apply intelligent corrections to get there the long way 'round, as it were. Add to it that by using SIPs I'm striking out on my own to some degree, and I'm kinda off in the weeds - though I would think that the results over in the hempy headquarters strongly track with my SIPs (sub-irrigated planters).

Do you struggle with humidity at all, in the early stages?

On my 5th node (just now removed for a quad setup, haven't stripped bottom 2 yet) I'm only running 400-450 (Hanna) PPM, MC 2 part mixed 10-7-10, with 25ppm calmag, 10ppm silica in the reservoir. Per 10 gal. peat/perlite 'soil' there's a lot of dolomite ('dolopril'), plus 4 cups homemade vermicast, 1/8 cup aged poultry litter, 1/4 cup frass, and was transplanted in with 'home-grown' mykos (actually some Promix brand myks and NPK RAW microbes cultured under wheatgrass, corn, pea and bean mix for 3 mos) and a stiff mix of Liquidirt and Humboldt's Secret Golden Tree to water in (the single time I'll water the whole grow), oh and some molasses. Now I just wait for each plant to use up its 3 gallons of fertilizer onboard... dunno how I'm going to keep my meddling hands out of the stew that long. Maybe a new hobby....ha!

 

[Chuckeye]

With light levels and feed being so closely linked I think your canary thoughts make good sense. Also, considering how much the lights off period appeared to reset her disposition it seems a reasonable line of inquiry that possibly now has another piece of supporting evidence.

I'm starting to think this one plant in particular is an anomaly. In effect I cut her feed in half And raised the lights and she responded positively. And her feed was originally 60% of recommended.

My other Maxi test subject, the Amnesia Auto was on roughly the same feed and is asking for more !

Do you struggle with humidity at all, in the early stages?

Early as in seedlings ? I used to use a plastic bag on them for a day or two and don't bother anymore.

This grow the girls where under a lesser light and on my kitchen table. The yogurt containers were first watered to waste before the seeds were planted (with a tap root) and then watered with a 1/2 cup roughly every four days until transplant @ day 17. No spritzing, no bags/dome...

As to current humidity, it is usually 5-10% more in the grow room than the rest of the building. With the majority of the girls receiving 4L in the last day or two, the rh is 48%, 40% in the rest of the building.

Good luck with your witches brew

Cheers

 

[Chuckeye]

This was the Green Crack MaxiGro tester last night.

I hate to do it but I'm pretty sure she comes down today, sigh...

5' x 5' "seems" like a lot of room but five plants will be shoulder to shoulder before long !

Cheers

 

[ReservoirDog]

Yes, I think I'm a 4 plant 5x5 man m'self, w/ a net or proper scrog depending how Sativa-ey the 4 are.

As for maxigrow/bloom, my grapes love it - this year looks to be double last year's harvest, and all tomatoes, courgette and aubergines absolutely went off like a bomb if they were in sunshine#4 this year and got maxibloom. Only issues outdoors was the bug season to end all bug seasons. Incurred heavy losses early. Now I'm seeing no less than 4x normal spider activity for this time, so that's great-ish.

Aye, witches brew indeed. Forgot to add the strangest addition of all, an experiment with a locally, personally, discovered blue clay that's just flooded with cation exchange capacity that I soaked peat in before mixing. Someday I'll stop asking for trouble... doesn't look like today though.

Here's some maxi charts, lite, med, heavy

Maxi Series™ Feedcharts

Explore our feedcharts for Maxi Series professional nutrient system.

generalhydroponics.com

 

[Chuckeye]

Well, I didn't have the heart to chop the small Green Crack, sigh....

Instead I gave her a hair cut leaving just the four top branches from her topping

And tied her up so her diameter is roughly the same size as the bag !

I was also concerned there could be an interaction going on between whatever remained of her original feeding with MC so I did a 3X flush with the final containing 3g in 4L of MaxiGro.

My Amnesia Auto received 3.5g of MaxiBloom in 4L of water. There is one bottom leaf just starting to yellow so I will up the feed next watering.

Cheers

 

[TorturedSoul]

Well, I didn't have the heart to chop her

Who knows, maybe that plant will end up yielding the best bud in the garden. What strain is it, again?

 

[Chuckeye]

Who knows, maybe that plant will end up yielding the best bud in the garden. What strain is it, again?

The smaller of the two Green Crack seeds from CropKings

She started in a single serving yogurt container.

Cheers

 

[Sparkey224]

Great looking plants Chuck.

Maxi is a great product imo. Ran it for awhile.

Maxi grow 4 grams in veg, depending size of plant.

Flowering:
2.5 grams Maxi grow gallon
2.5 grams Maxi Bloom gallon
With cal/mag
Run that recipe until week 6 flower and drop the Maxi grow.
Adding 5 grams to maxi bloom total with cal/mag finish out.
Ph @5.8 feedings

Im sure they will finish out great bud.
Cheers