Empire Apple
Pollination & Compatibility Guide
Empire apple pollination partners, bloom group 3 timing, and compatible companions. Complete grower guide covering compact spur habit and thinning.
Empire is Self-Sterile (Needs 1 Partner)
Empire needs at least one compatible pollinizer from bloom group 2–4 to set a reliable crop.
- Chromosome Ploidy
- Diploid (2n)
- Required Companions
- 1 Diploid Partner
- Bloom Group
- Group 3 (Mid-Spring)
- Harvest Timing
- Mid (-15d from Golden Delicious)
Flowering Period & Overlap Window
Apple flowering periods are classified into numbered bloom groups (1 through 6). A variety reliably cross-pollinates with cultivars in its own group or adjacent groups (±1 group).
Any compatible diploid apple flowering within Group 2 to 4 provides matching blossom overlap.
Compatible Pollination Partners (85)
| Cultivar | Bloom Group | Overlap Type | Harvest | Primary Uses | Interactive Test |
|---|---|---|---|---|---|
| Group 3 | Full Overlap | Mid Concurrent (±0d) | All-Purpose | Test Cross | |
| Group 3 | Full Overlap | Mid Concurrent (±0d) | All-Purpose | Test Cross | |
Nova Easygro | Group 3 | Full Overlap | Mid Concurrent (±0d) | All-Purpose | Test Cross |
Connell Red | Group 3 | Full Overlap | Late ±5d delta | All-Purpose | Test Cross |
| Group 3 | Full Overlap | Mid ±5d delta | All-Purpose | Test Cross | |
Crimson Gold | Group 3 | Full Overlap | Late ±5d delta | All-Purpose | Test Cross |
Fiesta (Red Pippin) | Group 3 | Full Overlap | Mid ±5d delta | Fresh Eating | Test Cross |
| Group 3 | Full Overlap | Mid ±5d delta | Cider, Cooking | Test Cross | |
| Group 3 | Full Overlap | Early ±5d delta | Fresh Eating | Test Cross | |
Honeygold | Group 3 | Full Overlap | Mid ±5d delta | All-Purpose | Test Cross |
Kidd's Orange Red | Group 3 | Full Overlap | Mid ±5d delta | Fresh Eating | Test Cross |
King David | Group 3 | Full Overlap | Late ±5d delta | Cider, Cooking | Test Cross |
Mother | Group 3 | Full Overlap | Mid ±5d delta | Fresh Eating | Test Cross |
Opalescent | Group 3 | Full Overlap | Mid ±5d delta | Fresh Eating | Test Cross |
Spartan | Group 3 | Full Overlap | Mid ±5d delta | All-Purpose | Test Cross |
Incompatible Varieties & Exclusions (21)
These varieties overlap in flowering time with Empire but cannot fertilise it due to sterile pollen (triploids) or shared genetic incompatibility alleles.
Arkansas Black produces no viable pollen, so it cannot serve as a pollinizer.
Ashmead's Kernel produces no viable pollen, so it cannot serve as a pollinizer.
Baldwin produces no viable pollen, so it cannot serve as a pollinizer.
Belle de Boskoop produces no viable pollen, so it cannot serve as a pollinizer.
Blenheim Orange produces no viable pollen, so it cannot serve as a pollinizer.
Bramley's Seedling produces no viable pollen, so it cannot serve as a pollinizer.
Fall Pippin produces no viable pollen, so it cannot serve as a pollinizer.
Gravenstein produces no viable pollen, so it cannot serve as a pollinizer.
A direct parent (McIntosh × Red Delicious) — roughly half the pollen is non-functional, so it is not a reliable partner.
Jonagold produces no viable pollen, so it cannot serve as a pollinizer.
Karmijn de Sonnaville produces no viable pollen, so it cannot serve as a pollinizer.
A direct parent (McIntosh × Red Delicious) — roughly half the pollen is non-functional, so it is not a reliable partner.
Mutsu (Crispin) produces no viable pollen, so it cannot serve as a pollinizer.
Orleans Reinette produces no viable pollen, so it cannot serve as a pollinizer.
A sport of a direct parent (McIntosh × Red Delicious) — genetically identical to that parent, so roughly half its pollen is non-functional and it is not a reliable partner.
Ribston Pippin produces no viable pollen, so it cannot serve as a pollinizer.
Roxbury Russet produces no viable pollen, so it cannot serve as a pollinizer.
Spigold produces no viable pollen, so it cannot serve as a pollinizer.
Stayman Winesap produces no viable pollen, so it cannot serve as a pollinizer.
Tompkins King produces no viable pollen, so it cannot serve as a pollinizer.
Zabergau Reinette produces no viable pollen, so it cannot serve as a pollinizer.
Grower Commentary: Empire Pollination, Spur Structure & Crop Load
Empire is a diploid, self-sterile apple cultivar bred at the New York State Agricultural Experiment Station in Geneva from a controlled cross of McIntosh × Red Delicious (released 1966). Flowering in bloom group 3 (mid-season), it produces abundant viable pollen and requires cross-pollination from compatible diploids like Gala, Honeycrisp, Granny Smith, or Golden Delicious.
Strict parentage exclusions: Inheriting genetic alleles from McIntosh and Red Delicious, neither parent variety can serve as a dependable sole cross-pollinizer for Empire. Offspring sharing parentage (such as Cortland, Macoun, or Spartan) must also be avoided as solitary companion trees in orchard blocks.
Tree architecture and fruit sizing: Empire exhibits a compact, highly productive spur-bearing growth habit with strong natural red fruit coloration. However, trees are prone to setting dense multiple clusters with small average fruit diameter. Aggressive chemical thinning within 14–21 days of petal fall, combined with early hand-thinning, is essential to achieve commercial fresh-market size grades.
Agronomically resilient: Displays strong natural field tolerance to fire blight strikes and good resistance to cedar apple rust, making it a reliable, manageable staple across northern and eastern growing districts.
Key Orchard Considerations for Empire
Prone to over-setting small fruit; early chemical and hand-thinning to single fruitlets is mandatory for commercial size.
Exclude direct parents McIntosh and Red Delicious as sole pollination companions due to shared S-alleles.
Natural tolerance simplifies spring bactericide management compared to highly vulnerable cultivars.
Take Empire 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 Empire 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.