Stella Sweet Cherry
Pollination & Compatibility Guide
Stella cherry pollination guide: self-fertile S4′ universal donor mechanics, bloom overlap, cross-compatibility, and backyard/commercial care.
Stella is Self-Fertile (Universal Pollen Donor)
Origin of the S4′ self-compatibility mutation. A universal pollen donor — accepted by every other sweet cherry regardless of shared alleles.
- S-Genotype / Genetics
- S3S4' (Group SC)
- Required Companions
- 0 (Self-Fertile)
- Bloom Group
- Group 3 (Mid-Spring)
- Harvest Timing
- Mid Season
Flowering Period & Overlap Window
Sweet and sour cherry flowering periods are classified into numbered bloom groups (1 through 5). Cross-pollination requires overlapping bloom timing between genetically compatible cultivars.
Any compatible cherry cultivar flowering within Group 2 to 4 provides matching blossom overlap.
Compatible Pollination Partners (20)
| Cultivar | Bloom Group | Overlap Type | Harvest | Primary Uses | Interactive Test |
|---|---|---|---|---|---|
| Group 3 | Adjacent Overlap | Mid-Late | Fresh Eating, Canning | Test Cross | |
| Group 3 | Adjacent Overlap | Mid | Canning, Fresh Eating | Test Cross | |
| Group 3 | Adjacent Overlap | Mid | Fresh Eating | Test Cross | |
| Group 3 | Full Overlap | Mid | Fresh Eating | Test Cross | |
| Group 3 | Full Overlap | Mid | Fresh Eating, Dessert | Test Cross | |
| Group 3 | Full Overlap | Mid | Fresh Eating | Test Cross | |
SelahGuideUniversal Donor | Group 3 | Full Overlap | Mid | Fresh Eating | Test Cross |
SunburstGuideUniversal Donor | Group 3 | Full Overlap | Mid | Fresh Eating | Test Cross |
| Group 3 | Adjacent Overlap | Mid | Fresh Eating | Test Cross | |
| Group 3 | Adjacent Overlap | Mid | Fresh Eating, Canning | Test Cross | |
Attika | Group 4 | Adjacent Overlap | Late | Fresh Eating | Test Cross |
| Group 2 | Full Overlap | Early | Fresh Eating | Test Cross | |
| Group 2 | Full Overlap | Early | Fresh Eating | Test Cross | |
| Group 2 | Adjacent Overlap | Early | Fresh Eating | Test Cross | |
| Group 2 | Full Overlap | Early-Mid | Fresh Eating | Test Cross |
Incompatible Varieties & Exclusions (3)
These cherry varieties overlap in flowering time with Stella but cannot fertilise it due to shared S-allele genetic incompatibility groups.
Utah Giant's S-genotype is not recorded. For this crop compatibility is computed from S-alleles, so it cannot be offered as a partner without one.
Vibrant's S-genotype is not recorded. For this crop compatibility is computed from S-alleles, so it cannot be offered as a partner without one.
Vindskörsbär (Victor)'s S-genotype is not recorded. For this crop compatibility is computed from S-alleles, so it cannot be offered as a partner without one.
Stella Sweet Cherry Pollination & Universal Donor Role
Stella represents the foundation of modern self-fertile sweet cherry breeding across the world. Released in 1968 by the Summerland Research Station in British Columbia (Lambert × John Innes 2420), Stella was the world's first commercially viable self-fertile sweet cherry, eliminating the requirement for companion pollinizers in traditional commercial and home orchard layouts.
Stella carries the breakthrough S3S4′ genotype, placing it in the Self-Compatible group (SC). The mutated S4′ allele enables self-pollination while conferring universal pollen donor capability: Stella pollen is genetically accepted by every other sweet cherry cultivar regardless of incompatibility group, S-allele combination, or ploidy structure in the orchard.
Blossoming in Bloom Group 3, Stella is ideal as a standalone single-tree planting or as a high-efficiency pollinizer row within commercial blocks of Bing, Rainier, or Van, providing reliable weather insurance, high pollen viability, and heavy fruit set across the entire bloom window in temperate climates.
Growers appreciate Stella for its consistent fruit set, heavy spur production, and ability to crop reliably in difficult spring weather when insect pollinator flight is constrained.
Key Orchard Considerations for Stella
Stella sets full, heavy crops with its own pollen, making it the premier choice for home orchards, farm fruit plots, and single-tree garden plantings where space is limited.
As an S4′ carrier, Stella fertilises any sweet cherry flowering in Bloom Groups 2, 3, or 4, making it an invaluable buffer against pollination failure in mixed blocks.
Fruit is juicy and sweet with moderate firmness. Prune annually to encourage sunlight into the canopy and prevent cluster-crowding on heavy-setting wood.
Take Stella from Planning to Planting
Use Kropigo's free browser tools to model your block density, tree counts, and pollinizer rows, then maintain permanent orchard records row by row.
Pollination Checker
Check Stella against supported cultivars with compatible flowering and pollination data.
Commercial Block Planner
Calculate high-density tree spacing, row geometry, and establishment costs.
Block Record Keeping
Track pruning, chemical thinning, and harvest tallies block by block from the orchard.