Do Nutes Make One's Water More Acidic??? (Help!)

Delicious SweetLeaf

Active Member
I'm about ready to give my outdoor potted Autoflowers their first full feeding of nutes-- an organic fish-based high Nitrogen solution (since they're still babies and need stem and leaf growth right now). I just added my ferts (only a half the recommended dose) to water that was balanced at about 6.3ph, and after testing the final solution I see that the ph is now way below 4, what might be seen as far too acidic.

These are Autoflowering plants, and it seems they would thrive best with water somewhere between 6.0 and 6.5, ideally.

Do nutrients typically throw the ph all out of whack???

After a high Nitrogen fertilizer has been added, is a ph rating of 4 or lower typical and therefore OK???

My girls really need this food badly (they're starving and in need of growth), so if please pipe-in if you know what's going on here.
 
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churchhaze

Well-Known Member
What final solution? You say that as if you're using deep water culture. With that type of food, I hope you're growing in soil. If so, don't worry about the pH of what's going in.

To answer the question more directly, some nutrients will have a tendency to raise pH and some will tend to lower it.
 

CwN

Member
Be sure to give them some Phosphorus as well. If you have young plants they need Phosphorus in order to create a strong root system. Too much nitrogen too early will do more harm than good. In my experience. After transplanting a lot of farmers will use whats called a starter liquid fertilizer with high amounts of P and variable amounts of N&K to get the transplants growing roots quick.
 

Delicious SweetLeaf

Active Member
Thanks for your helpful response, Churchhaze... Yes, I'm growing in soil... And by "final solution" I simply meant the water with the fertilizer and a few drops of SuperThrive added.

So because the plants are being grown in actual soil, the ph of the water/nutrient solution isn't really that important???
 

Delicious SweetLeaf

Active Member
Thanks for the tip, CwN... Yes, the Nitrogen ferts I'm going to feed it include Phosphorus, and are a 5-1-1 ratio. Prior to this the only ferts I fed the plants were low-to-moderate doses of Phosphorus, specifically to instigate root development. I assume the roots have taken nicely to it, because the plants seem quite healthy and vibrant, although small and (somewhat) slow-growing... That's why I feel it's time to feed it something that's going to accelerate growth of it's leaves and branches right now...

But I admit that I'm concerned about feeding my plants a solution that's quite literally off the charts in acidity... I am growing in soil, but does that fact automatically just "undo" the effects of a highly acidic watering/feeding???
 

churchhaze

Well-Known Member
Short and is "yes", it does. The buffering capacity of the soil is very hard to "break". It would require a concentrated strong acid, and a lot of it to change the properties of the soil.

. I am growing in soil, but does that fact automatically just "undo" the effects of a highly acidic watering/feeding???
 
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