Does low PH soil always affect plant health?

Hello everyone. I have 4 plants about a month old. They seemed to struggle after the transplant. 1 has seemed to make a full recovery. They’re all in Ocean forrest soil. Been in there about 2 weeks. I just checked the spil ph of one that seems to be doing the worst. It was at 5.3 i thought that was the problem until i tested the soil of the one doing well and it is the same. Mid 5’s. So is it possible for a plant to overcome low soil ph and thrive? Is she just a warrior? Or should i look for other problems? Im watering every 3 days or so. I use a moisture meter. The water is tap that sits out. I use ph down to get it between 6 2 and 7.


3 Likes

What soil is that? Looks like mostly peat moss.

2 Likes

I would definately raise your ph. Water till runoff with phd water at 6.5 . Check your runoff and you want to water till your runoff is in the low 6s. With a ph that low it will cause stunted growth and lockout. Do you have a TDS meter to check ppms.

4 Likes

and remember a point is a big change in pH kind of like sound/dB one point is a 10x or double or something like that… huge difference between 5.5 and 6.5

3 Likes

Give her a flush and then give her a good feeding in a couple of days.
Make sure your ph is on point also.
Should be back on track in no time.
Might need to up the nutes
Good luck and happy growing

3 Likes

“I’m high maintenance” is hilarious. That is great.

4 Likes

That PH is considerably low for soil, looks like you may have a nutrient uptake issue. Seeing a nitrogen deficiency for starters :love_you_gesture: what was the PH of the water you’re using?

3 Likes


If you look at the chart some neuts cant be obsorbed at too low/high ph readings.

2 Likes

Its ocen forrest

Sorry for the late replies, i work early. When i water which is every 3 days or so, i aim for different ph levels. But make sure i stay within the soil range. Never watered with ph lower than 6.3. Never above 7.0. I do have an EDC pen. My ph pen is a blue lab soil/water pen. I calibrate it regularly. And the high maintenance sign was a Christmas gift. So is it possible for a plant to thrive in acidic soil? Ill show pictures of the healthy plant after 6 when the lights come on. I just hate flushing soil, it is expensive lol.

2 Likes

Here are the other 3 plants.



Flushing with a couple of gallons of water is always a no harm and cheap option to reset your plants. I see nitrogen lockout on your top picture @detroitpwp3. I personally would flush then leave them alone for a few days…then go back to normal watering.

1 Like

I know flushing is free. I just meant the price of the dirt. So flush with a couple gallons of water per plant? Should i ph the water? My tap water is naturally around 7-7.2.

1 Like

It won’t hurt it at 7 if the runoff is at high 5s now. Drench them with dechlorinated water a couple of times then leave them alone. Next time you water in a few days when the pot gets light…check the runoff and it needs to get above 6.2. You may have to drench them again to get it where you need to be. I’ve found it’s better to keep ph at 6.5 in veg and I can let it drop to 6.2 in flower.

4 Likes

1 Like

So do you guys think i should flush the good plant too? Or just leave it be?

Also, just so we’re clear, ive never measured the runoff. Those readings were from the soil direct. I never water to get runoff. I was told not to when using super soil

Don’t believe what you were told…that’s the opposite of what you want with hot soil. Water the plant until you have a decent amount of runoff out the bottom and measure the ph and ppm. If the ph is low and ppm high…too many nutrients. If the ph is high (it won’t be) and ppm low…need to add nutrients. Obviously…you need to know the ppm of what you’re feeding

2 Likes

I grow in Living Soil aka Super Soil and i always water till i have runoff. Living soil never needs to completely dry out because you kill off beneficial microbes working the soil.

1 Like