BowHunterSimon
- 58
- 18
Are you checking the ph every time you feed them ?
Thank you for the informative help.For you next grow, if you decide to use ProMix, try not using any organic amendments and just use your base GH nutrients. Keep things simple. Perhaps even consider smaller pots. Unless you're growing trees, 3 gallon pots of ProMix works great and you can still grow decently sized plants with no isses. ProMix really isn't picky with pH and anything reasonable in the range of 5.5 to 6.5 works fine. Dont worry about runoff until your roots are well established. Once your roots are established, you can water until runoff. In 3 gallon pots, I was watering once every 2 - 3 days. I didn't add any additional perlite to the ProMix. If you let ProMix dry out too much, you can start getting salt buildup that usually presents itself early in flower, at least that what i've experienced. I would get on a schedule of Feed - Feed - very Light feed to keep the medium in check. I had NO issues running high ECs of around 2.0 during veg and then running a bit lower EC during flower. I havent used GH nutrients so you might have to experiment a bit.
If using tap water, I recommend getting a water analysis done or get a analysis from your municipalty to see what's in it. My water sucks and is almost 1 EC on it's own with a bunch of bullshit that plants don't like (i wont drink it either). I settled on a mix of RO and tap water.
Good luck. I hope you're able to turn this grow around! They don't look terrible all things considered.
The suggestions look to be spot on, your plants look hungry for sure. You can run pretty high EC's in ProMix as long as you keep the medium in check.But I defiantly will have to feed alot more than what I have been so far (according to responders suggestions).
They say it doesn't make a difference as it is buffered with lime, tho over time the lime will wear off and pheat is really acidic, therefore the ph can very likely drop later in the grow if not paid attention to.Just an added note regarding pH. I had a lengthy conversation with the folks at PTHorticulture (they make ProMix) and the pH of your feed water doesn't really make any difference. It's really dependent on the alkalinity of your water and the fertilizers used. Understanding 'alkalinity' is probably a more important concept than pH itself.
This is straight from the horses mouth (from the makers of promix):
"The water pH has almost no influence on the pH of the PRO-MIX because PRO-MIX has it’s own buffering capacity (granted not as good as soil). Whether the pH of the water is 4.0 or 8.0, it will not make much difference on the pH of the PRO-MIX. It is the alkalinity or bicarbonate and carbonate content in the water (which will be near zero when processed through R.O), the fertilizer used and the plant itself. Keep in mind that R.O. water has almost no buffering capacity , so the water pH is not stable. So if you adjust it to 6.2 it could drift a whole pH unit simply by exchanging carbon dioxide with the atmosphere." -PTHorticulture
If you water with 6.5 and it comes out 5.9 your medium is bringing the water towards what it is more than the water is pulling the pH it’s direction. You medium is 5.9 -6.0, would be my guess.They say it doesn't make a difference as it is buffered with lime, tho over time the lime will wear off and pheat is really acidic, therefore the ph can very likely drop later in the grow if not paid attention to.
Which makes me wonder why my runoff was at 5.9 before when I watered with 6.5-6.6 water, tells me they must've been sitting in 5.1-5.2ph and that was fresh promix with added lime (i suppose lime takes time to do its buffering magic). But I thought because of such low PH the plants had nute lock out despite me feeding them (lightly anyways).
Been 3 weeks now and a week ago PH slurrly test was at 6.5 after stirring and letting it sit for 2 hours with distilled water, which tells me they are at 6.0ph roughly now. But still no difference in growth.
Still not sure what's happening. Giving them a couple more days and see how they look. Everything seems to be adjusted to proper levels for now anyways.
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