Hi Rob Welcome to the vine.

Thats a difficult question. Are you growing at home ofr on a lottie? If it's a lotty & the row is about 20ft wide I would say 2 rows, a row of earlies/mids & a row of Mids/lAutumns if you could split the the rows so it was about 3/4's earlies & Autumn fruiting that would be about right as the Mids overlap a bit anyway so you don't need so many of them.

As to price, some of the fruit suppliers are just more expensive & some are probably better quality plants but you'll have to decided what you want to pay & then get the best for your money.

Also grow them on a double row system & you'll get more fruit. This involve a post at either end of the row with 2 horizontal bars one at around 30" & onne at around 5ft with wire between them. top bar about 30 " bottom one about 18" then the canes are tied to this in the form of a 'V' lets light & air in & also allows you to have twice as many canes compare with the singl row of wires.

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