Is Superior self-pollinating?

No — Superior needs a compatible pollination partner nearby.

Plum variety

Superior

Also known as Superior Plum

The short answer

Superior grows in USDA zones 4–8^[1]. It needs a pollination partner^[2].

Superior growing facts
Chill requirement	Not published for this variety
Hardiness	USDA zones 4–8^[1]
Pollination	Needs a pollination partner, bloom group 3^[2]
Harvest window	August^[2]
Years to bearing	3–5 years (typical for plums)^[3]
Appearance	Large fruit with dark red, russet-dotted skin^[2]

Superior plumSpecies illustration — no historical watercolor exists for this cultivar

Superior blooms in group 3. The closest bloom-time matches make the most reliable partners:

Show 10 more compatible varieties

Hybrid plum introduced by the University of Minnesota; heavy-bearing, ripens mid-August, and needs a pollinizer such as Toka.^[2]
Rated good for hardiness in zone 4 but poor in zone 3; heavy-bearing tree may lack hardiness in the far north.^[1]

When the work happens for a plum in USDA zone 6, anchored to typical frost dates.

Check the verdict for a few regions, or your exact ZIP:

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What hardiness zones suit Superior?: Superior grows in USDA zones 4–8.
Is Superior self-pollinating?: No — Superior needs a compatible pollination partner nearby.

[1] Clemson Cooperative Extension (Home & Garden Information Center). Plum (HGIC 1362) — accessed July 2026
[2] University of Minnesota (Minnesota Hardy / Horticultural Research Center). Plums — Minnesota Hardy — accessed July 2026
[3] Iowa State University Extension and Outreach. How soon will a newly planted fruit tree begin to bear fruit? (Yard and Garden FAQ) — accessed July 2026