Is there a reason that mamey would be a preferred rootstock rather than grafting onto another green sapote seedling?  Assuming you had them handy.

I ask because I have a green sapote but no mamey, and I don't plan to get a mamey nor can I find them locally.  But I might be able to plant green sapote seeds and graft mature scion onto those.

nm, I found an answer to my question:  http://tropicalfruitforum.com/index.php?topic=19763.0

Sounds like green sapote scion on green sapote rootstock should be fine.

in bulk, yes, but I think the issue is nobody can find small quantities

Beautiful brian! I'm surprised it's flowering so soon. Great job.

...

Is it typical for green sapote SEEDLING to flower after only a couple years and at a small size?  I am wondering if maybe I picked up a grafted one at Excalibur when I was there but I'm pretty sure I didn't.  I definitely have an email from buying a seedling green sapote from ebay Aug 2018 and I don't recall one dying.  The tree flowering in my picture does kinda look like it has a graft line so I am l doubting myself now that this is actually a seedling, but that's what the receipt says.  This site https://www.hort.purdue.edu/newcrop/1492/sapote.html says they take ~7 years from seed to fruit?  Mine can't be more than four. 

I got one a couple years ago from the seller 'safenut' on ebay.  They are in Hawaii, looks like they ship to CA.  I paid $27+shipping in 2018.  They are still selling them now, $40 + shipping.

https://www.ebay.com/itm/One-seedling-plant-10-12-inches-29-cm-Green-sapote-Pouteria-viridis/184642778134

it looks like mine is flowering now... is this what green sapote flower buds look like? 

Im waiting for my covid shots.  Also I'll probably wait for another fruit season as I go to try your avocados last year from the fruit sale

The dry flesh is a big upside for me, I like that i can pull it apart and eat the flesh without gettinf juice everywhere.  And they have a somewhat unique taste for citrus.

I haven't tried any outdoor zone pushing, butI would be concerned that a very cold night with wind could blow away any bubble of warm air generated by lights, etc. and leave your plants freezing.  Also, harsh winter storms are exactly when you're most likely to lose power.  I have multiple levels of battery-powered alarms and backup propane canisters so I could heat my greenhouse for a few days even with no power.   This kind of thing isn't really feasible outdoors.  You might be able to get by with christmas lights (and propane heaters for a power loss),  if you can throw up a makeshift tent on the worst cold windy days to keep some heat in, if you keep the trees a reasonable size. 

When I see my tree leaves are showing a nutrient deficiency I apply a foliar low-concentration fert spray, and also apply a tyical root liquid fert application.  A foliar spray is supposed to be a "quick fix" to correct an immediate issue

Tango is one of the common mandarins sold as "cuties" or "halo" and grocery stores across the country.  It is very slightly pumpkin shaped and less round than the spherical "clementine" type that is also sold under this name.  As far as mandarins go, I don't think Gold Nugget is all that similar to Tango at all.  I've had some good Gold Nuggets from grocery stores, and some good ones from my tree, but overall they tend to be too puffy and over-sweet/not-sour-enough in my experience.

Tango is usually totally seedless, thin skinned, easy peel, sweet with a bit of sour and tasty.  It is a great variety!  But shasta gold is simply better in my opinion

Shasta gold has more cell toughness (flesh firmness), which I like.  The rind is a bit thicker but easier to peel in my limited experience (I only got one Shasta crop so far and it was small).   Mix of sour and sweet.   I don't like pure sweet.

My Gold Nugget has always been a weak one.  I think it is just my tree and not the variety in general so I don't want to comment as some kind of authority

Yeah, Sumo has such a good reputation I want to give it a while before I decide it isn't fantastic.  Could just be a bad crop due to conditions.

Same with Xie Shan.  The Xie Shan fruit I've grown so far weren't amazing, but the tree hasn't been super healthy either.  I am going to give it a few years and see.

My tango was extremely healthy and fruitful, and it was just what I expected, but I was blown away by the very first Shasta Gold crop I had

I keep a few propane tanks and those "Mr heater" attachments as backup heat in case I lose power.  Requires manual setup, but power failures are rare for me.

I hadn't noticed any significant issues with lack of circulation.  I'm sure it isn't optimal this way, but it seems to be just fine for emergencies

Does that mean this "Kumchau" is simply another name for Nagami kumquat?  It does look similar to nagami, but a bit fatter than I am used to seeing.  I only have Nordmann Nagami which is shaped a bit differently, so my perception of plain Nagami might be off.