I grew Rich May and found it to be a poor producer here. I’ve worked really hard the last 3 years to try to get rid of varieties which produce poorly. I want to sell good flavored peaches, and will get rid of varieties which produce poor flavor, but I also can’t tolerate poor production.
As an example, I’m going to start getting rid of Spring Snow. I have about a dozen of these trees. It’s an outstanding tasting white peach (my favorite) but it’s production is too unreliable to make it commercially viable for me. It ripens in the Harrow Diamond/Earlystar window, so I will be replacing it with Harrow Diamond.
I would encourage you to limit experimenting of questionable varieties to a couple trees per variety. I can’t tell you how many trees I’ve pulled out because they didn’t work for me. My research into finding out what tastes good and produces decently here has been very costly.
That’s one thing there is minimal university research. Namely, peaches which are commercially viable in questionable peach growing areas. Virtually all the peach research is done in states where there are lots of commercial peach orchards. Of course those areas have the most conducive climates for peach crops. In my area, late spring frosts, and an occasional hard winter, make commercial peach production more iffy, so the recommendations from peach specialists don’t necessarily work for me. Unfortunately, I’ve had to do my own research.
Recommendations from my state university extension are pretty much worthless, since they are just repeating info from other universities, where the research was done in prime peach growing states.