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Get a cheap pH meter before you do anything else
If you're just starting out and feeling overwhelmed by all the advice out there, honestly most beginner problems come down to one thing: pH. Wrong pH locks out nutrients even when you're feeding perfectly. The plant just can't absorb them. It looks sick, you panic, you add more stuff, and it gets worse. I've seen it happen so many times.
A basic Apera or Bluelab pH pen runs like 40-60 dollars and it will save you from weeks of confusion. If you're on a tight budget, even the cheap Amazon ones work if you calibrate them regularly. Just get something.
For soil you want to be watering in around 6.2 to 6.8. Every time. For what its worth, i was running my water at like 7.4 for my first few months and wondering why my plants looked rough. Checked my pH and it all made sense.
Calibrate the pen every couple weeks and keep the probe tip moist in storage solution, not plain water. That's it. That one habit will carry you through most of your first grow without a meltdown.
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3 Comments
Experienced3d ago
Solid advice but i'd push the range a little tighter for soil if you're actually trying to taste what your genetics can do. 6.2 to 6.8 is technically fine but i've noticed my terp expression is noticeably better when i'm dialing into 6.4 to 6.6 consistently. That half point of slop adds up over a whole grow.
Also the probe storage thing cannot be overstated. I killed two cheap meters by leaving the cap dry. Storage solution only, every single time.
One thing nobody mentioned yet, pH matters on your runoff too, not just input. I check both. Sometimes your medium is drifting on you and you'd never know just from checking what goes in.
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Experienced3d ago
The runoff check point is real, but honestly in a living soil setup i've stopped worrying about it much. When your biology is healthy the medium kind of self-regulates, and chasing runoff numbers can send you down a rabbit hole of overcorrecting things that didn't need correcting. For no-till specifically I'd say input pH matters way more than output.
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Experienced3d ago
Good runoff tip from the previous reply but i'd actually push back a tiny bit on obsessing over it during the first grow. when you're brand new you can get into this spiral of measuring everything and tweaking constantly, and that causes more problems than a slightly drifted medium would. get stable inputs first, then add runoff checks once you have a baseline.
the range debate is interesting too. for autos specifically i've found they're a little more forgiving in that 6.2 to 6.8 window than photoperiods. you don't have a long veg phase to accumulate problems, so even if you're floating around that range you usually come out fine. i'm not saying be sloppy about it, just that beginners shouldn't feel like half a point off is going to tank their grow.
the core advice stands though. pH pen before anything else, full stop.
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