any pro mix users out there?

7CardBud

Well-Known Member
I had problems the last 6 months with Promix. Started to have very bad acidic issues. Adjusted my nutrient feeds to 7 plus and problems gone.

Love the no bug issues. No other problems with Promix at all.
I learned this trick from the guy at the grow shop years go. You can moisten the Promix 7-10 days before use, that gives the buffers time to activate and bind with the peat. It's not uncommon for fresh Promix to have a Ph in the low 5's.
 

Jjgrow420

Well-Known Member
I learned this trick from the guy at the grow shop years go. You can moisten the Promix 7-10 days before use, that gives the buffers time to activate and bind with the peat. It's not uncommon for fresh Promix to have a Ph in the low 5's.
Screenshot_20210316-172114.png
 

Jjgrow420

Well-Known Member
Apparently I'm not the only one who thinks the medium should be watered to run off. :rolleyes:
.
the internet will provide you with whatever you want to hear.
im sure theres articles on both pro and against runoff in promix.
personally i just dont water to runoff and i dont have issues. its actually a good part of the reason i use promix because i dont want the hassle of runoff.
and like i said if i water too much they will droop and ill loose a good days growth....overwatering.
 
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myke

Well-Known Member
The bigger commercial guys that feed heavy get a good runoff every time. For us guys that just want some smoke anything and everything can work. Feed accordingly. The good thing is if you see a problem. Simple ,just feed to a lot of runoff. Lol. Fixed.
 

stnr420

Well-Known Member
howdy there.
just wondering what you promix guys and maybe gals ph at
generally i run between 6.3-6.5 but just watching some vids on their website they are suggesting 5.5-6.0
now. ive grown for quite some time and never stray from 6.3 at the lowest. anyone going lower?
6.3 all day...I've played with their recommendations....plants didn't stay green....I've found this is the sweet spot...I sometimes have to add a little more lime if the initial run off comes in lower than 6.0
 

Aeroknow

Well-Known Member
6.0-6.2 and runoff everytime. Did that for years and works great.
last few years i’m rockin the kings mix and treating it the same as i do promix. I like my dirt to have a little coco in it nowadays, and I ain’t got no time to break up bails.
 

guitarguy10

Well-Known Member
Apparently I'm not the only one who thinks the medium should be watered to run off. :rolleyes:
.
When an educational document tries to throw in some really strange dark dad joke in there ("If you don’t have proper drainage for your plant, you might as well let the CIA waterboard it for you ") it doesn't inspire confidence.

But this is just dead wrong and invalidates this document: "Every time you water your plants, you are doing 2 things. First, you are providing water for it to grow. Second, you are flushing the waste products of the plant’s natural processes out of the soil so they don’t build up and cause toxicity. "

The major waste products are gaseous at STP (O2, CO2) and most of the other waste products are consumed by the microfauna (like mycorrhizae) that's in the medium and shares a symbiotic relationship with the plants' roots. The small remainder of waste products such as saps, resins, latex etc. are not water soluble.

The internet is great for porn, terrible for citable sources of accurate/correct information :(

I think that if you have your feeding concentration and schedule down runoff might not be necessary unless you are experiencing problems. But if you are unsure about your feeding concentration/schedule then watering to run-off provides a buffer zone (aka time to fix your fuckups).
 

steve870

Well-Known Member
at the end of the day it depends on how much salinity your feed is. If your growing like soil in large pots you are probably not feeding enough to reach salt toxicity. But if you feed in large pots like you do in hydro without runoff(because the pot is so big) then you might run into trouble). i guess you can do both with promix if you adapt your pot size really
 

Jjgrow420

Well-Known Member
at the end of the day it depends on how much salinity your feed is. If your growing like soil in large pots you are probably not feeding enough to reach salt toxicity. But if you feed in large pots like you do in hydro without runoff(because the pot is so big) then you might run into trouble). i guess you can do both with promix if you adapt your pot size really
ya i like to run 4gal pots which is fairly large considering my plants are generally on the smaller side as my basment has a low celing and i can only fit a gorilla tent shorty series in there. yaya i know i can build a room which im totally able to do but thats not in the cards atm. doing renos rewiring replumbing furnace goi g in instead of old boiler. so i got trades and inspectors comming in every so often (do everything myself wiring plumbing but has to be inspected and passed for proper insurance blahh blah)
 

volcanoOFhistory

Well-Known Member
howdy there.
just wondering what you promix guys and maybe gals ph at
generally i run between 6.3-6.5 but just watching some vids on their website they are suggesting 5.5-6.0
now. ive grown for quite some time and never stray from 6.3 at the lowest. anyone going lower?
I have never pHd using pro mix in over 12 years
 

hotrodharley

Well-Known Member
Watering to runoff is more bro science because of poor feeding and watering habits.

“Using a watering can, hose or similar, water the plants until runoff is visible in the trays beneath the pots. Many growers aim for around 10-20% of total water draining off, as this is believed to prevent nutrient build-up—but this is disputed.

Nutrient build-up occurs due to oversupply of nutrients (or reduced uptake by the roots due to overwatering or pH issues), and is fixable by flushing with pure water and not by adding more nutrient solution.”

I’m sure Sensi Seeds is probably a bunch of newbies but
 

hotrodharley

Well-Known Member
Flushing is unnecessary in volumes greater than you use to feed or water. Just water until you see runoff and stop. Waterlogged roots are the start of problems for inexperienced growers.

Overwatering is the number one cause of death of plants husbanded by man. Pot has survived despite man and not because of him.
 
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