I am putting in a new vineyard this year, soon. I have 'Valiant' grape seedlings to put into it when it is ready. I have read that grapes produce better if not fed and not planted in too rich soil. The spot I am using is currently sod covered with some weeds and has been ignored for years, probably decades.
Should I dig in manure this first year to give the seedlings some nurishment to get established for a couple of years or leave it as is?