How does a Plant React to High & Low PH Levels?

Just curious if anyone has some solid advice to pin point high and low PH levels without testing the soil. Any certain characteristics?? Any time frame when PH actually starts becoming a problem??

I was reading somewhere that a good "sweeping range" of PH levels is good because it allows the plant to absorb all the nutrients they require. Good opinions regarding this, would be appreciated.

RIU rocks sock's!

Bad, or at least not as good as it could.

I find best results when the pH is dialed in to a pretty narrow range. Yes, some fluctuation is okay, but the standard recommended 5.8-6.5 works best for me.

The only kind of equipment I really require is an accurate pH test to .1 increments. I'm a big fan of liquid test solution, but I know a lot of people use meters just fine.

Temperature, moisture and nutrient concentration... with experience I've learned to measure intuitively just fine, though I still check often with proper equipment.

But pH is really critical if it's not in an acceptable range, and there's only one way to for sure what's going on... that I know of.

I also use liquid testing to test my pH.

Check after you put your nutes in.