Kia ora koutou,
@Mango Stein
Cornus mas need about 400+ h
This is a educated guess from the native distribution area in Europe.
I had the opportunity to taste some. Wild, selected and breed.
IMHO is growing anything else than the very best fruit cultivars a waste of time.
And you need at least two of them for cross pollination.
I would recommend you the following clones:
'Schönbrunner Gourmetdirndl' - origin Austria
'Yellow' - yellow fruits that get way less eaten by birds. Origin Austria
'Jolico' - origin east Europe or Austria
Good luck in getting them.
@TriangleJohn
Mr. Zaiger has breed low chilling hour sweet cherry (Prunus avium) for Florida.
Look here:
www.davewilson.com/product-information/product/cherries