please enlihhten me

[mygrass]

hi guys/girls can somone please tell me if i am meant to ph my water when growing in soil im using canna terra soil along sized there vega and flores nutes thanks.

 

[Easy7]

Potential hydrogen. I always PH'd but I read an article I wish I had bookmarked. This short but sweet article discussed how when the plant uptakes a nutrient it releases something back. This in-turn affects the ph of the soil.

 

[Easy7]

In order to become available to a plant, a cation adsorbed on a clay particle must be replaced by a cation present in the soil solution. Plant roots facilitate this process by excreting a hydrogen ion (H+) into the soil solution in order to exchange this for a cation (e.g. potassium - K+).

The cumulative effect of a hydrogen (H+) ion being given up by a plant leads to soil acidification if the cation (e.g. K+) is not replaced. In this way the introduction of H+ ions into the soil solution also increases the rate of weathering of primary- (e.g. feldspars) and secondary clay-minerals (e.g. kaolin).

The process of substitution is known as cation exchange and occurs only when a cation in the soil solution moves into the hemisphere of motion of a cation located on the surface of a negatively charge particle. This is shown diagrammatically, for the potassium ion (K+), which is exchanged from the surface of a clay particle by the hydrogen ion (H+) which moves from the soil solution.

 

[Easy7]

I'm not familiar with your nutrients. Plants themselves will acidify over time but I would also guess that your nutrient is acidic and will acidify the soil much quicker than the cation exchange.

Did you test your diluted nutrient solution? For all I know your working with alkaline water and an acidic nutrient and ending up fairly neutral. Gotta give to get.

 

[mygrass]

I'm not familiar with your nutrients. Plants themselves will acidify over time but I would also guess that your nutrient is acidic and will acidify the soil much quicker than the cation exchange.

Did you test your diluted nutrient solution? For all I know your working with alkaline water and an acidic nutrient and ending up fairly neutral. Gotta give to get.

to be honest buddy that just cunfused the hell out of me sorry, i think your askung whats my tap ph and after well my tap sits at 7'0 and after nutes its 6'2 but surely it depends on how much nutes i use.

p.s im still unsure whether thats a yes or no i wish i could undrstand stuff like that.....

 

[mygrass]

i have read a page recently that says no and that said site said no also the canna people said no but then it says differntly on there packaging and other people say yes/no????

 

[Easy7]

Sounds like your soil will acidify over time. Could happen less than a grow, could take longer than a grow.

Do you reuse and recycle soil? What soil are you using. Is this hydro? I don't know any of these things.

When I ran hydro with PBP I always had a super stable PH and that most definitely requires ph'ing.

Do you test run off if this is soil? What do you have to buffer the ph in soil?

 

[mygrass]

its bag brought potting mix etc canna terra no i would never re-use at the moment there in 1 litre pots and i dont water to know there run off as there still to young

 

[Easy7]

So we don't know the ph of your soil. You didn't add anything to the mix? I hope it's good stuff!

6.5 is what it should be at

 

[mygrass]

So we don't know the ph of your soil. You didn't add anything to the mix? I hope it's good stuff!

6.5 is what it should be at

i think its best if you google it has lime ,peat moss and spag moss and perlite, i just done a test on my ones in flower plain tap water my ph is 7.1 runoff on 1st 6.2 2nd 6'0 it does say on the back bufferd to 6'0 the sales rep said it no need to ph for soil as the lime is a buffer etc