Kordia Sweet Cherry (Attika)
Pollination & Compatibility Guide
Kordia (Attika) cherry pollination guide: S-genotype (S3S6, Group VI), late bloom overlap, compatible partners (Regina, Skeena), and orchard care.
Kordia is Self-Incompatible (Needs 1 Partner)
Attika is a synonym of Kordia — same tree, same genotype. Kordia needs at least one compatible pollinizer from bloom group 3–5 to set a reliable crop.
- S-Genotype / Genetics
- S3S6 (Group VI)
- Required Companions
- 1 Compatible Partner
- Bloom Group
- Group 4 (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 3 to 5 provides matching blossom overlap.
Compatible Pollination Partners (16)
| Cultivar | Bloom Group | Overlap Type | Harvest | Primary Uses | Interactive Test |
|---|---|---|---|---|---|
LapinsGuideUniversal Donor | Group 4 | Full Overlap | Late | Fresh Eating, Canning | Test Cross |
SkeenaGuideUniversal Donor | Group 4 | Full Overlap | Late | Fresh Eating | Test Cross |
SweetheartGuideUniversal Donor | Group 4 | Full Overlap | Late | Fresh Eating, Canning | Test Cross |
TehraniveeGuideUniversal Donor | Group 4 | Full Overlap | Late | Fresh Eating | Test Cross |
| 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 | Adjacent Overlap | Mid | Fresh Eating | Test Cross | |
| Group 3 | Full Overlap | Mid | Fresh Eating, Dessert | Test Cross | |
| Group 5 | Adjacent Overlap | Late | Fresh Eating, Storage | Test Cross | |
| Group 3 | Full Overlap | Mid | Fresh Eating | Test Cross | |
SelahGuideUniversal Donor | Group 3 | Full Overlap | Mid | Fresh Eating | Test Cross |
StellaGuideUniversal Donor | Group 3 | Full Overlap | Mid | Fresh Eating, All-Purpose | Test Cross |
SunburstGuideUniversal Donor | Group 3 | Full Overlap | Mid | Fresh Eating | Test Cross |
| Group 3 | Adjacent Overlap | Mid | Fresh Eating | Test Cross |
Incompatible Varieties & Exclusions (3)
These cherry varieties overlap in flowering time with Kordia but cannot fertilise it due to shared S-allele genetic incompatibility groups.
Attika shares both S-alleles with Kordia — they are mutually sterile, whatever their bloom overlap suggests.
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.
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.
Kordia (Attika) Pollination Strategy & Commercial Performance
Kordia (frequently marketed under the synonym Attika) is one of the premier late-season dark sweet cherries in global commercial production. Originating in Techlovice, Czech Republic, Kordia produces exceptionally large, heart-shaped, glossy black-red fruit with long, elegant green stems, remarkably firm crisp flesh, high natural sugar levels, and extraordinary cold storage longevity.
Genetically classified in Incompatibility Group VI with the S3S6 genotype, Kordia is gametophytically self-incompatible. It cannot set fruit with its own pollen and requires a cross-compatible companion tree. It is fully compatible with Regina (S1S3), Schmidt (S2S4), and universal self-fertile donors like Skeena (S1S4′), Sweetheart (S3S4′), and Lapins (S1S4′).
Kordia blooms in mid-to-late spring (Bloom Group 4). Because of its late flowering habit, it effectively escapes early spring frost events that threaten earlier-blooming cherries. Pairing Kordia with Regina (Bloom Group 5) or Skeena (Bloom Group 4) forms the backbone of premium commercial export orchards worldwide, ensuring dependable annual yields of export-grade dessert fruit.
Key Orchard Considerations for Kordia
Kordia features superior resistance to fruit cracking, especially at the stem bowl. Long, robust fruit stems stay green post-harvest, commanding top prices in export packaging.
While late blooming helps avoid early cold, late-season frosts during petal fall can injure king blossoms. Maintain frost-protection wind machines or overhead sprinklers in frost pockets.
Kordia performs exceptionally well on dwarfing Gisela rootstocks. Ensure adequate nitrogen and summer irrigation to prevent tree run-out and sustain high average fruit weights.
Take Kordia 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 Kordia 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.