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Can I ask which is best as I read green netting removes useful light spectrums compared to say a different colour.
The light goes through the holes of shade netting and is therefore not altered. The bits of the netting that are not holes block the light and cause shade.
I am doing alpines-the books say the correct type for quick rooting plants is sand,also that sharp sand is the way to go(it defines sharp as may be a better mix than bagged stuff I think?)
Sharp sand covers a wide range of materials and I cannot rule out some people having success with sharp sands other than coarse grit.
So I think you are very much agreeing with this.
Possibly!
Is course grit sand basically a very gritty sand which lets in air.
Yes.
The different books mention that a compact mixture kept moist is ideal.
Compact mixtures might lack air so should be used with caution.
Probably assimulating mountain conditions for quick rooting in the alpine mountains.
Wild plants tend to propagate themselves by seed as they have no mechanism to take cuttings of themselves.
So is course grit sand the way to go.
I would try that first.
Is it sold in bags as coarse sand or horticultural sand which is the same thing.
It is usually offered as coarse grit, but a coarse horticultural sand might do.
I notice B&Q does not do the horticultural sand and tends to just do the unwanted sharp,builders and silver.
Good garden centres will offer the right stuff - if they don't take your custom elsewhere.
Are the builders yard the way to go as they ordered horticultural grit for me planting alpines in a few months back.
Horticultural grit should be fine.
They may do horticultural sand too should I ask for this?.
I would try grit in the first instance.
Can I get something called grit sand as you say or is coarse sand the thing to ask for in fact?
Grit/sand means grit or sand. Grit or coarse sand are likely to be effective.
Beware the bat-eared bogweevil
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