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Builders' sand for drainage?
Andy Hunt wrote:
I have some builders' sand hanging around in my yard, and I was going to use it for drainage in some new pots I've bought today. My dad however has advised me not to, he says that this sand contains lots of chemicals which won't do plants any good, because it is building sand. The sand has been outside in the rain for at least 3 years - does anyone know if my dad's correct about this, and if so, whether the rain would have washed the sand clean by now? Even if it is full of chemicals, if I just use it for an inch-thick layer of drainage material at the bottom of each pot, would it be OK? Thanks in anticipation! Andrew It is much better to use horticultural grit as it will not contain huge amounts of lime. I don't think builders sand contains chemicals but you should be aware of the ph (acidity) level of the sand. Some plants tolerate high lime level whereas others will not. |
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