4 KudoZ points awarded for this answer. Comment: "Strictly speaking, Johanna should really get the points here, because I ended up going with "orchard of standard trees" based on the other KudoZ reference she gave (even though that was FR-EN). It doesn't get a huge number of hits, but "high-stem orchard" gets about the same, and there appears to be a fairly close semantic relationship between "standard" and "high-stem" in this context anyway. "Standard-grown fruit crops" got no hits apart from this question, so that appears not to be quite the right phrasing in this instance. Many thanks to everyone for your assistance - much appreciated."