Posted: 22/08/2014 at 09:47
My only real experience is with the wild type, small plums. My trees were grown by myself from wild collected plums, sown ~1985. They are now trees higher than the house and are covered in fruit most years, some yellow, some blue. The yellow ripen earliest, maybe 2 months ago, the last are now falling off the tree. We pick them and use or feeeze them whole the same day. A friend collected a bucket full last week to make jam, removing the stones with a coarse collander before boiling down.