I have had a Butterscotch in the ground for the past couple of years. It was small when I planted and it is approaching 6ft tall now, but still has a spindly trunk. It flowered last year (no fruits) and flowered this year again, but didn’t set any fruits. It seems to be dropping off in its flowering now. I think the tree is still too young to support a full size fruit. I tried squishing flowers and it didn’t work for me.
I recently bought 7g Thomas and Hasya varieties to help with pollination. The Thomas and Hasya are flowering now. Seems a bit later than my Butterscotch. Neither of those have set fruit either, but I think they are still too small. The trunk circumference is similar to my BS.
I also picked up a 7g Alano and a tiny Silas Wood, so I think my sap collection is now complete. 😂
I have not tried anything other than Alano.
Julie - how big was your Hasya when it set fruit?