A pollinator is required, otherwise you won't get any fruit.

My Mariposa plum gets pollinated by Satsuma and Santa rosa plums, and even by Krauter vesuvious myrobalan plum. In fact, a have a red-leaf Mariposa x KV myrobalan plum hybrid. The pollen parent is the KV myro plum and the seed parent is the mariposa plum. Oh...my hybrid will start producing fruit this year.

I have a question, have you heard of Nadia sweet cherry x plum hybrid? It was invented in Australia, and this is the first time that is been introduced in the USA for the home gardeners.

My Questions are: have you tasted them? Have you plant it a nadia tree? Are they popular in Australia?

I will be planting two trees this year, so any addtional information will be highly appreciated.

Yes,that depends if there are pollinators within the area,better to be within about a hundred feet or so.
The ones I read up on so far,that can do the job are Beauty,Nubiana,Santa Rosa,Late Santa Rosa,Satsuma and Catalina.
Grafting a scion or two onto the Mariposa is another option to increase success. Brady

Thanks for the info. I'd heard that the other pollinators would have to be within the same neighbourhood or a 4 km radius before. I think I might craft a scion on to the tree as I have a small garden.

I've never heard of the Nadia sweet cherry x plum hybrid, sorry.

Thanks again.

Hi seeking help. I purchased a Mariposa (approx 6ft) bare rooted and planted in late June. To date no flowers at all and buds are not swollen at all. Branches appear still green so I think it's alive. Can anyone give me some advice. My neighbour has a number of fruit trees including a plum (not sure of species) thanks