Does the ph of the rock matter to the tree?

[emrylle]

I had the idea to ror this quince with this limestone rock. But I’m my research I learned that quince likes a slightly acidic soil and that limestone is pretty basic. So I’m wondering if the alkalinity of the rock will have an adverse effect on my quince tree. Is this a consideration, or am I totally overthinking this?

 

[rockm]

One kind of traditional rock used in ROR composition in Japan is Ibegawa rock. It’s also used in aquarium aquascaping. It’s slightly alkaline. Doesn’t affect the trees that are planted on it much.

 

[Wires_Guy_wires]

Plants regulate their rhizosphere ("root area") pH pretty dramatically. They can add or subtract up to two whole pH points in the area around their active growing roots. PH is expressed on a log scale so we're talking not 10, but a 100 fold more acidic or less acidic in both directions.
So growing roots will weather the rock a little, but since they dip down into the soil later, on the long term you shouldn't notice a thing.
The plant should be fine.

 

[Michael P]

Nice piece of Texas holey rock.