Some plums are self fertile while others need a pollinator. Unlike apples, just having two different plum varieties flowering simultaneously will not insure proper cross pollination. Use Toka or native Prunus americana as a pollinator for plums. Use Compass as a pollinator for cherry plums. European or Prune type plums are generally self-fertile.
Plums prefer a sheltered site out of the wind to insure that flowers are pollinated successfully.
Most soils are suitable, but avoid those that are highly alkaline or poorly drained. For the best flavor allow fruits to ripen fully. For freezing or preserving, pick them when ripe but still firm. Small to medium, sweet, juicy, yellow fruit. Excellent for eating fresh and for jams.