I used sharp sand on my lawn - it left my hands feeling a bit sore (I spread it by hand). It was pink too - stained the boot of my car it did.
I grew my onions in two places this year. One bed was quite sandy (from the previous owber) and one not (created by me). The ones in the sandy soil didn't do as well as those in the not.
I'd be tempted to grow the roots in the sandy stuff - I know when we used to buy a veg box the carrots used to arrive covered in sandy soil rather than the clay we have.
I grew my onions in two places this year. One bed was quite sandy (from the previous owber) and one not (created by me). The ones in the sandy soil didn't do as well as those in the not.
I'd be tempted to grow the roots in the sandy stuff - I know when we used to buy a veg box the carrots used to arrive covered in sandy soil rather than the clay we have.
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