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Variety fit — Illinois

Can I grow Superior plum in Illinois?

The verdict

Yes

  • Your zone 6a and typical 1510 chill hours both suit this variety.

Based on Illinois’s main growing area (62701): zone 6a, ~1,510 chill hours. Your exact site may differ — check your ZIP.

The numbers

Superior requirements vs. Illinois climate
Superior hardinessUSDA zones 4–8
Illinois average chill (62701)1,510 hours (1,232–1,820 across 10 winters)
Illinois zone (62701)USDA zone 6a
Superior plumSpecies illustration — no historical watercolor exists for this cultivar

Keep checking

Or the same verdict for another region:

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Questions

Can I grow Superior plum in Illinois?
Yes — Your zone 6a and typical 1510 chill hours both suit this variety.

Planting a Superior? Gear that helps

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Before you plantMySoil mail-in soil test kitLab-grade pH and nutrient analysis with amendment recommendations — worth doing before you plant.View on Amazon →First-year wateringTreegator slow-release watering bag20 gallons drips over 5–9 hours — the easiest way to keep a first-year tree consistently watered.View on Amazon →Bark protectionExpandable trunk protectors (5-pack)Stops rabbit, vole, and mower damage on young bark — cheap insurance for a new orchard.View on Amazon →

Sources

  1. [1] Open-Meteo / Copernicus ERA5. Historical Weather API (hourly 2m temperature) — accessed July 2026
  2. [2] USDA / PRISM (Oregon State University). 2023 USDA Plant Hardiness Zone Map — accessed July 2026
  3. [3] Clemson Cooperative Extension (Home & Garden Information Center). Plum (HGIC 1362) — accessed July 2026