JC, it should work if the pollen is still viable. Dapple Dandy is 98+% diploid plum so it should be compatible.

Please follow up here as to whether the Satsuma sets in a few weeks.

Scott

Are there different types of satsuma plums? I have one and it is self-fertile. Or are you trying to make interesting crosses?

Wizard, I've read many times that Satsuma needs a pollinator, specifically Santa Rosa. Also Beauty or Burgundy, don't remember which. As proof of this, this tree is more than 10 years old and every year is full of blossoms but produces at most one solitary plum. A few years ago I started grafting different plum varieties to this tree, and last year there were some flowers and the Satsuma managed a few extra plums. This year I'm hoping to jump start the process with some pollen from my apricot tree/dapple dandy flowers.

Scott, there's a good point...how do I know if the pollen is viable. I've been wondering about that with other fruit trees also, as I try to hand pollinate some of them. Can you tell by the color of the pollen (white, yellow, brown??), or how can you judge their viability? Or the time of day(morning, noon, evening?). Is there a standard that I can go by...

jc

JC, pollen is viable until the flower drops. Dropped pollen it still viable for a bit, but no bees are visiting it so it will not help in pollination. For this reason the general rules on pollination are about overlap of bloom.

Scott

Plums are not common in Kalgoorlie Western Australia with 275mm of rain annually and summer temperatures averaging 34 degrees C. I had Satsuma plum without a pollinators like Santa Rosa. I did have two types of apricots but they fruited early summer while the Satsuma fruited mid to late summer. No neighbours within 200 metres had plums but in some years I had bumper crops. Fruit had no evidence of variation with deep red flesh. I have always believed I needed a polinator until this tree produced fruit.

Well the plum would not change no matter what pollinated it. You can't change the genetics of the tree or it's fruit with pollen. And I would bet wild plums, or even other prunus species are pollinating the plum, so the apricot is doing it IMHO. You should grow out seed, you might get something interesting. Afterall a pluot is a plum crossed with apricot. So it can happen, we have proof! The Pluot!

Also what matters is if flowers are open at the same time, not when the fruit is ripe, that has nothing to do with it.