promix help

[sour d tox]

what is promix considered if its not soil and what ph am i supposed to have using it i was under the impression that promix is the same basics as soil and i been trying to get my ph to 6.8 runn off and my plants are mag def right now and yellowing fast.

 

[Core]

its considerd soilless....and ph for soilless is between 5.8 - 6.2.....use search for more info..

 

[skylined]

I believe Core is correct on those pH numbers. However, if I'm reading it right I'm guessing that promix is peat based. I would add some dolomite lime if I were you because while it does have some pH balance it will probably run out before your grow does, and thusly you will have lockout at a very bad time. I think a small handful per large pot (2-3 gallons) should do the trick there. Oh yeah, Dolomite lime will also help that mag deficiency if I am remembering right

Peace,
~Skylined

 

[Guest]

PH of 5.8 I would use quick-lime do not do this unless you have lots of experience.

 

[JJScorpio]

Promix is sphagnum peatmoss, perlite and dolomite lime. Very easy to make your own........

 

[Guest]

Not enough dolomite though from my experience using it,soil ph would drop to 5 in flower every time until I started liming it.

 

[Guest]

There is much less dolomite in Promix HP than in Sunshine #4 mix. There needs to be no additional dolomite in Sunshine #4 IMO.

 

[inflorescence]

Promix is sphagnum peatmoss, perlite and dolomite lime. Very easy to make your own........

Except premiere has really nice quality peat. IMO sunshine is a step down (albeit a small one).
Premeire has their blends down pretty well conerning the size of the differents sifts of peat they use. Their stuff is pretty consistent and they go thru the trouble of mixing a 3.8 cu foot compressed bale. I sure wouldn't want to mix that much with all that perlite dust.

 

[TrustNoOne]

yeah, you definately want to wet promix a little bit before mixing. it smokes out into a pretty fine dust.
promix hp is what i had used for years till it started to come with sticks and bark chunks. i think it used to have more perlite in it also.
promix has alot of positives that make it a great medium for mj. the biggest are that you totally control the feeds, what you put in is what you have. also the stuff dries out quickly and evenly so it's relatively easy to get plants on a good feed schedule.
it's easy to carry and store as a bale goes along way versus loose bags of potting and top soils.
the negatives are the low ph, which can be controlled with lime but you have to know that going into a grow or else you can have problems. another negative is that it dries quickly and some don't want to water that often, for resons that i definately understand. it's much easier on you if you only have to water once a week or so so versus every 3-5 days.
add lime annd perlite and you can have an exellant growing medium. they aren't mumber one for nothing.
i've used metro-mix 560 with coir for my last three runs and i highly recommend the stuff. think i'll stay with it. lol. it holds a little higher ph which gives my lazy ass one less thing to deal with. ph the feed to 6.3-6.4 and lite up. no worries.
i'd use hp again any day except all the suppliers around me have only been bringing in xp. xp has vermiculte and perlite and i don't grow with vermiculte. just holds too much water for my liking.

 

[JJScorpio]

I dump a half a bale of the 3.8 into a wheelbarrow and use a watering can and sprinkle about four gallons of water over it. If you let that sit for about an hour it pretty well moistens it and gets rid of the dust. I am considering opening the top of the bag and start wetting it a few days before I need it. I couldn't imagine mixing it dry, lol.....

 

[Babbabud]

just open the sunshine mix bag ... dump it out and add about 20 percent big chunky perlite. It has plenty of lime to last out a grow and that includes those long runners like the shire that i run for 90 plus days. I run the botanicare line including calmag and have great luck.

 

[TrustNoOne]

i'll tell ya that you don't want to pick up those bails if they're wet. heheh. i had a waterlogged frozen bail last winter and it must have weighed 150 lbs.
has anyone used the metro mix 560 w/coir?
i'd love to hear others opinions and experiences.
i think the best thing you can do with peat based mediums is make sure you stay on top of your cal and mag and use a complete fert and nute program, whether a store bought or home blend. i've used MG and PETERS for ferts with promix with great results but i can see how newer growers can have problems that just won't go away.
it can hold ferts easily so you should allow lots of runoff when feeding

 

[gro4luv]

American...I'm wondering if, using promix in a "straight to 12/12" grow, will the effectiveness of the dolomite occur at a bad time?

 

[sour d tox]

im not sure if i got the hp or x last time it was in a white and gray bag ? what is the diffrence?

 

[gro4luv]

http://www.premierhort.com/eProMix/menu.htm

open new tab, cut and paste...all you need to know

 

[sour d tox]

i am using bx

 

[gro4luv]

Yeah, the BX has vermiculite + perlite, the V to provide water retention, P for porosity.
Plus the micro+macro nutes.

I think, promix type depends on individual tastes and experimentation. Since they are considered a "soiless" mix, nutrient uptake(burn, def, ph probs) will occur more quickly than with soil, yet slower than hydro, and it's brethren.

What is the pH of your water? I've been using tap water with a pH of 7.5 with promix for containers...no problems yet...

 

[inflorescence]

Each soil sample was adjusted 4 different ways.
1. with an equal amount of RO (1:1 ratio)
2. with an equal amount of Tap (1:1)
3. with an equal amount of RO (1:1 ratio) plus dolomite lime (which would approximate 1TBS per gallon soil)
4. with an equal amount of Tap (1:1 ratio) plus dolomite lime (which would approximate 1TBS per gallon soil)

This isn't a perfect representaion because I only used 4 TBS of soil for each sample and my dolomite rate was only 1/2 an 1/8th teaspoon, which I don't know if the math was right to approximate 1 TBS per gallon. It may be incorrect. lol
Also, when I measure dolomite pH only, it comes in at 8.1 whether it's mixed with tap or RO.
I believe success soil adds way more dolomite lime to their mix. (too much IMO)

RO=distilled
Tap= My crappy tap (pH=8.0, [email protected]=700)

Measured with a hanna that uses a .72 conversion factor. The probe was placed in the slurry but it was mostly the water part that had stratified off the saturated peat.

1/16 and 1/8 dolo measured in tsp. (I think I calculated that the 1/16 tsp dolo scaled to 1 TBS/gal of medium and the 1/8 tsp dolo scaled to 2 TBS per gallon.)
The dolo is in ADDITION to the dolo already present that premeire adds..
RO = 7 pH, 0 ppm