I have sandy soil with very little organic matter. For Sweet oranges, Satsumas, Mandarians, Lemons and Grapefruit which would you recommend for each one. I live in Pensacola Fl with a 8b zone. Last year I saw 19.3 on two days and two weeks with every night below freezing, Probably the worst winter ever here.

Trifoliata is suppose to add a few degrees of cold hardiness, std trifoliata will produce bigger trees sooner than Flying Dragon which is considered a dwarfing rootstock, but really just grows slower. Both are resistant to root rot.

Hi Skeet,
Apparently there are quite a few hybrids from the old reliables including the tri-foliate that are available now. I'm gingerly stepping out of the box to see if any of them might be good up here. I looked up the Escambia Co. (county where I live) soil map and the area where I live is an acidic brown sand with little to no organics. It is that way for at least five feet down. This is very similar to the citrus growing regions in central Fl as far as composition is concerned. They called it a Troup soil.

If anyone cares to read this see page 40.
http://soildatamart.nrcs.usda.gov/Manuscripts/FL033/0/fl_escambia.pdf

I'm not sure about the Ph of the central Fl soil but that is easily changed. Any way my point is that maybe some of the newer rootstocks they are using there May be a good thing here especially since they are designing these rootstocks to cure problems that eventually will creep this way. Does this make any sense? I hope so. On the other hand since they look very promising but are still new they may create a new set of problems. LOL what’s a poor dumb boy to do. Apparently some of them have had ten year trials and are in the final stages of being mainstreamed.