Quote:
Originally Posted by Citroënbender
Is it possible the sand used in this Premium mix, includes a portion of envirosand? That would explain the alkalinity, being from mortar.
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That's something I forgot to expand on in my previous post.
Three components make up this soil, which is blended and then sold to the general public -
Sand - this can be either range from alkaline to acidic, most often alkaline though.
Cow Manure - when aged and composted, this is pH neutral.
Composted Green Waste - unknown pH.
As I alluded to, it's either the sand or compost that is causing this alkalinity. Obviously these companies, both the blenders and retail level suppliers, don't like being told their product is not fit for purpose, finding the actual culprit would be very difficult.