I’m confused about plums. I have a few plums methley, stanley, burgundy, AU producer AU rosa. Are these considered european or japanese plums?
What’s the differnce between european and japanese plums? is it mainly a matter of pollution?
Can someone please share a good truthful pollution chart with many plum varieties? I’ve seached and the more I read the more confused I get, there’s so much conflicting info 
Thanks
Your varieties methley and burgundy are Asian plums ( Prunus Salicina) and can cross pollinate each other if their blossom schedules match close enough.
AU producer and AU rosa are hybrids of the p Americanna or Native American plum. They should be able to cross pollinate each other if their blossom schedules match close enough.
Stanley is a Prunus domestica or European plum, it is self fertile but may produce better like all plums with another European plum pollinator that has a close blossom schedule.
If you just search online for pollination charts for each of the three types you will get cross pollination charts that tell which varieties will pollinate other varieties in the same type.
The key is finding a variety that closely matches your varieties’ s blossom schedule because it’s the first week when a plum blossom opens that it’s most receptive to pollen, if you miss the window then it has to depend solely on its own pollen. That’s why it’s best to match blossom schedules. So finding someone in your region with similar climate that has your varieties is helpful because they may already know which varieties you need to match schedules with what you have. This is why I always post my blossom schedule for plums each year to help members in zone 8 find good pollinators. If you want I can pm you mine for 2024.
Btw most pluots and pluerries are best cross pollinated by p Salicina varieties.
Hope this is helpful.
Dennis
Kent, Wa
Thank you for taking time to respond. It helped me tremendously.
I have a AU rosa tree… that I added a graft of AU producer to a couple years ago.
Here my AU Rosa starts blooming right at March 1… and my AU Producer opens first blossoms just a couole days later.
PS… The first year I planted my AU Rosa and Shiro trees… the AU Rosa opened 100 little blossoms. The Shiro opened one blossom a week or more later…
I was expecting pollination failure… but the AU Rosa set about 100 tiny plum fruits.
It seems it is self fertile… and quite succesful at that.
The problem I have here is that they bloom too early… set fruit… then we almost always get a hard frost and all fruit shrivvels and drops.
That happened in year 1 and 2… perhaps year 3 will be better.
TNHunter
The AU cultivars mentioned,have Asian Plum in their makeup.
Another good tip! Thanks Brady I had not thought of that! Means they can cross pollinate with the Asian plumbs if blossom schedules match well!
Dennis