Use local small suppliers where it is practical; they refer people to you and it keeps the local economy working. Sadly, the big companies do not feed the money back into the local area. The expression that money is made round to go round is very apt in country areas. Be very careful with greengrocers, they are brilliant first of all and then, if they deliver, you find the rubbish at the bottom of the box. If you can find a serious fruit and vegetable wholesaler or market, it is worth the drive two or three times a week the quality and price is that much better.