Trying to unterstand ph of soil and water

[DWCC]

Hey,
theres something i really dont get.

Ive read several times that the ph of your soil should be at 6.5 to 6.8, though im having a soil with a ph of 5.5 and my plants still grow. grow well

So, what does this mean? I just dont get it

Does the ph'ing of my water to 6.5 also change the ph of soil to the water ph after some time? If not, how do they grow? Is the ph'ed water stable enough to let the plant get enough ca and mg and then it drops and other nutrients are absorbed?

Today i did a soil ph test, the runoff method with r/o water ph'ed to 7.
The runoff was at 5.7, so i dont really get why my plants do grow, this time im having calcium and magnesium deficiencys but that was my mistake. dunno why i ph'ed the water to 6.2 but whatever

If my soil ph wouldnt become my water ph, i'd always have mg and ca deficiencys, but thats not the case. This speaks for it, but then theres my runoff with a ph of 5.7 so obviously the soil ph will be somewhere between 5.5 and 5.7 or?

Sorry for my english

 

[canna woop!]

Cannabis generally grows between pH 5.5-7

the soil pH is an independent factor of the water pH- totally different issues

soil pH is governed by the starting materials- most potting soil is peat or coco which can be very acidic- from around 4-5. Humus (decayed compost) is usually between 6-7 and it is a pH buffer. Meaning compost helps the soil balance pH naturally. Calcium carbonate is added (agricultural lime) to raise the pH up to 7. Crushed egg shells or chicken bones are calcium carbonate. Even elemental calcium in clay or crushed rocks is good for pH raising it a bit and supplying minerals to the soil food web. The bacteria and fungi eat the calcium in bones and rocks, releasing nutrients into the water that plants can use.

If you added any clay or crushed rock mineral to the soil, then a magnesium deficiency should be extremely rare, if not out of the question. Adding finely crushed egg shells or agricultural lime to the surface of the soil may raise the soil pH, just like adding compost will. However your best bet is to have all this stuff mixed in at the right amounts from the get-go.

 

[DWCC]

Thanks for you answer, but there are still some points that i dont get, already mentioned above.
Everywhere you read that it grows best from 6.5 to 6.8. I dont really get why it is possible that it still grows at such a low ph of 5.5 when for example mg and ca already gets locked out under 6.5 whats definately the case, just experienced recently.
So what impact does the ph'ed water has and why dont you fix the ph of the soil to 6.5?

 

[DWCC]

And the ph of the soil doesnt change when watering with ph'ed water?
Ive read this many times, even in a book of Jorge Cervantes

 

[canna woop!]

DWCC

The pH of water will not change the pH of soil significantly because the pH of soil is governed by the elements Calcium, Magnesium, Sulphur, and Potassium. Those are the positively charged Base Cations. They are present in the soil and they determine how much potential hydrogen will be available (pH). Hydrogen, Nitrogen, Phosphorous, zinc, iron, manganese, etc. are negatively charged ions (called anions) that basically dissolve the positive Base cations all the time. Over time the soil will get more and more acidic unless there are plants or minerals added that increase the pH by mining more base cations from rocks in the soil.

Some types of plants absolutely cannot grow in acidic soils, other's like weed don't mind it so much. That's why calculating the amount of lime (calcium carbonate) to add to soil is important, but your numbers can be a bit off because weed can tolerate a wider range of soils than your average vegetable.

watering your plants with pH-accurate water can still be useful if your soil pH is off and you want to try and optimize plant growth temporarily in order to mine more calcium and increase your soil pH. Plants will not draw water into the xylem if the pH is way off, but water in the 5-8 range should be fine (with soil that contains minerals)

what exactly are the ingredients in your soil? Each ingredient makes a difference

hth
woop