Can I use promix bx for autoflowers?

If so, when should I start with nutes? and at what strength? any advice will be much appreciated.

if your tap water isn't really crappy, most people feed with tap water till it gets a couple sets of leaves, you then start with 1/4 dose or even less of nutrients and work your way up slowly. always start with less than what the bottle call's for and remember that tap water has plenty of nutrients in it. Some mediums tend to suck up nutrients so its a good idea to give a little extra, for instance coco coir you need extra cal-mag because the coco eats it up. as for promix i am not sure but i know you should pH it at 5.8

bx you can straight water for 2-4 weeks. depends on the strain. always 1/4 to 1/2 strength.

Nizza said:

as for promix i am not sure but i know you should pH it at 5.8

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Y should I ph it at 5.8 if I'm not using hydroponics?

Growing in soil ph of anything added should be 6.0 - 6.5.

Doobius1 said:

Growing in soil ph of anything added should be 6.0 - 6.5.

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Pro Mix BX is technically soil less... peat moss based I believe.

Looks like soil to me but WTF do I know? I dont have a clue what Im doing in the waste of space abomination to the cannabis plant auto section anyways.

Doobius1 said:

Looks like soil to me but WTF do I know? I dont have a clue what Im doing in the waste of space abomination to the cannabis plant auto section anyways.

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You really didnt know it was soilless? I posted this for advice not guesstimations... especially if you haven't used promix bx for autoflowers..

you still ph in the 6's for soiless.

straight coir, or hydroton, or other inert medium is when you ph in the 5's

vilify said:

you still ph in the 6's for soiless.

straight coir, or hydroton, or other inert medium is when you ph in the 5's

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thanks fella

vilify said:

you still ph in the 6's for soiless.

straight coir, or hydroton, or other inert medium is when you ph in the 5's

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According to Pro-Mix the ph of the water doesn't matter in the least:

"Unlike true hydroponics, water pH is not important when using a soilless medium. In this case, the pH of the growing medium is the primary concern and is greatly influenced by the alkalinity (bicarbonates and carbonates) of the water, not the water pH. The only way to accurately determine the alkalinity (calcium carbonate levels) is to have the water analyzed by a reputable lab. The ideal alkalinity for most plant productions in soilless media is 80-150 ppm of calcium carbonate. If the alkalinity levels are above 250 ppm of calcium carbonate in the water, it may become necessary to inject acid to neutralize some of the calcium carbonate and to lower the water alkalinity to optimum levels."

I use Promix Bx for my autoflower Blueberry strains they're doung awesome so far. On week 4 and still haven't used nutes. Any suggestions?

These were grown in promix at a ph of 5.8 fed mega crop from day 14 starting at 200ppm

Axys said:

View attachment 4365095 View attachment 4365096 These were grown in promix at a ph of 5.8 fed mega crop from day 14 starting at 200ppm

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Awesome!!!

Jeremy1975 said:

I use Promix Bx for my autoflower Blueberry strains they're doung awesome so far. On week 4 and still haven't used nutes. Any suggestions?

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I would suggest feeding them, they look starving to me.

vilify said:

you still ph in the 6's for soiless.

straight coir, or hydroton, or other inert medium is when you ph in the 5's

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I like to use ocean forest and not feed for 30 days other than bat or seabird guano. Auto flowers are tricky just let em grow

I’m growing both autos and photos in Promix BX and HP. Working good for me. Go light on the nutes for the autos and you may need to supplement with some cal mag as mentioned, it’s a soilless medium with very little amended nutrients.