Is Vietnamese White prone to fruit drop?
I live in SE FL (near the Everglades) and have 2 Vietnamese white on trellises and fruit drop/flower pollination is about 50%. It can get a bit of rust in cool, rainy weather, too, but it's manageable to to treat with a bit of copper spray.
I have a cutting of Sugar Dragon and Neon that I am debating replacing them with. Should I just bite the bullet and replace the 2 above with them?
Fruit drop or flower drop? I have never seen fruit drop with VW and I am in your neck of the woods. What I have seen, on many varieties including VW, is flower drop after failure to pollinate. Typically this for me happens if we get any rain during the 12 hour bloom window.
That said, sugar dragon is bullet proof. No problems is full sun, handles drought quite well, tasty productive fruit, albeit quite small. No experience with neon.