Ph correction

M

Mooregrow

Active Member
just brought a ph pen and realised how far I was off with the colour chart.

3 out of 4 plants are surprisingly good considering I have been feeding them at 5.2 and the run off is the same at 5.2

BUT the other plant I’m having a lot of trouble with.. the runoff is at 4.2!!.. explains alot

growing autos in coco

what’s the best way to correct this without shocking the plant with to much of a ph fluctuation ?
 
S

spek9

Well-Known Member
Mooregrow said:
just brought a ph pen and realised how far I was off with the colour chart.

3 out of 4 plants are surprisingly good considering I have been feeding them at 5.2 and the run off is the same at 5.2

BUT the other plant I’m having a lot of trouble with.. the runoff is at 4.2!!.. explains alot

growing autos in coco

what’s the best way to correct this without shocking the plant with to much of a ph fluctuation ?
Click to expand...
I would flush the plant completely a couple times with plain, pH'd water. Then do a normal feeding, but at half dose of nutrients (ph'd of course, after the water and nutrients are mixed). Thereafter, continue your regular feeding schedule (always pH-ing of course).

Some growers just up the pH to alkaline (higher than the normal pH for the medium), until runoff gets back to reasonable, then drop back down to normal pH again.

Personally, I'd be more comfortable with rinsing and starting back up at the proper level, but to each their own, but in all honesty, I've never run into the situation. My opinion is just based on my mental plan if I ran into such a situation. Others with actual experience may have different ideas.
 
xtsho

xtsho

Well-Known Member
Just start watering to runoff with nutrient solution pH'd to 6.


spek9 said:
I would flush the plant completely a couple times with plain, pH'd water. Then do a normal feeding, but at half dose of nutrients (ph'd of course, after the water and nutrients are mixed). Thereafter, continue your regular feeding schedule (always pH-ing of course).

Some growers just up the pH to alkaline (higher than the normal pH for the medium), until runoff gets back to reasonable, then drop back down to normal pH again.

Personally, I'd be more comfortable with rinsing and starting back up at the proper level, but to each their own, but in all honesty, I've never run into the situation. My opinion is just based on my mental plan if I ran into such a situation. Others with actual experience may have different ideas.
Click to expand...
They're growing in coco. You don't want to flush coco with plain water.
 
Bignutes

Bignutes

Well-Known Member
Some guys purposely overreach their ph if its out of wack, @DoubleAtotheRON is the guy to talk to. I've done this with my soil grow, ph was at 7.4 because of dolomite lime I suspect. I've was giving them ph of 6.2, then dropped it to 5.0 for two consecutive watering. Its still not enough but its helping so i'll do it again. It didn't do any harm, the plants look solid since. Don't be afraid to experiment, 4.2 is worse than not correcting it imo, give it some 7, then 8 ph and see how it reacts, it's the average you want to hit, don't be concerned with the peak ph of 7 or 8, it'll settle out, ie 7+4.2 / 2 = 5.6.
 
2Hearts

2Hearts

Well-Known Member
Plants are good dont read runoff in coco. If ones at 4.2 and seems to stunt its a nutrient problem or something else causing low ph not the actual ph itself.
 
DoubleAtotheRON

DoubleAtotheRON

Well-Known Member
Bignutes said:
Some guys purposely overreach their ph if its out of wack, @DoubleAtotheRON is the guy to talk to. I've done this with my soil grow, ph was at 7.4 because of dolomite lime I suspect. I've was giving them ph of 6.2, then dropped it to 5.0 for two consecutive watering. Its still not enough but its helping so i'll do it again. It didn't do any harm, the plants look solid since. Don't be afraid to experiment, 4.2 is worse than not correcting it imo, give it some 7, then 8 ph and see how it reacts, it's the average you want to hit, don't be concerned with the peak ph of 7 or 8, it'll settle out, ie 7+4.2 / 2 = 5.6.
Click to expand...
Thats kinda the formula I use ie 4.5ph+12ph/2 = 8.25 That's a rough figure tho, because your soil (not coco that I know of) will buffer a little lower. I've fed in 12 to a 4.5 soil, and only got 5.8, BUT!,.. if you do that 2 times, and then adjust down to like 8 on the 3rd feeding, it will settle in the mid 6's. This is assuming you have a good PH meter to monitor your progress.
 
M

Mooregrow

Active Member
DoubleAtotheRON said:
Thats kinda the formula I use ie 4.5ph+12ph/2 = 8.25 That's a rough figure tho, because your soil (not coco that I know of) will buffer a little lower. I've fed in 12 to a 4.5 soil, and only got 5.8, BUT!,.. if you do that 2 times, and then adjust down to like 8 on the 3rd feeding, it will settle in the mid 6's. This is assuming you have a good PH meter to monitor your progress.
Click to expand...
I got the Bulelab ph pen, I will try feeding at a higher ph and see it it stabilises it mite try it gradually so I don’t stress it out to much with a sudden change?
 
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