Elstar Apple
Pollination & Compatibility Guide
Elstar apple pollination requirements, bloom group 3 overlap, and partner selection. Complete guide to European premier dessert apple and biennial control.
Elstar is Self-Sterile (Needs 1 Partner)
Elstar 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 (-25d 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 (87)
| Cultivar | Bloom Group | Overlap Type | Harvest | Primary Uses | Interactive Test |
|---|---|---|---|---|---|
| Group 3 | Full Overlap | Mid Concurrent (±0d) | Fresh Eating | Test Cross | |
| Group 3 | Full Overlap | Mid ±5d delta | All-Purpose | Test Cross | |
| Group 3 | Full Overlap | Mid ±5d delta | All-Purpose | Test Cross | |
Fiesta (Red Pippin) | Group 3 | Full Overlap | Mid ±5d delta | Fresh Eating | Test Cross |
| Group 3 | Full Overlap | Early ±5d delta | Fresh Eating | 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 |
Wolf River | Group 3 | Full Overlap | Mid ±5d delta | Cooking | Test Cross |
| Group 3 | Full Overlap | Mid ±10d delta | All-Purpose | Test Cross | |
| Group 3 | Full Overlap | Mid ±10d delta | All-Purpose | Test Cross | |
| Group 3 | Full Overlap | Mid ±10d delta | All-Purpose | Test Cross | |
Maiden's Blush | Group 3 | Full Overlap | Mid ±10d delta | Cooking | Test Cross |
Nova Easygro | Group 3 | Full Overlap | Mid ±10d delta | All-Purpose | Test Cross |
Wealthy | Group 3 | Full Overlap | Mid ±10d delta | All-Purpose | Test Cross |
Incompatible Varieties & Exclusions (19)
These varieties overlap in flowering time with Elstar 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.
A direct parent (Golden Delicious × Ingrid Marie) — roughly half the pollen is non-functional, so it is not a reliable partner.
Gravenstein produces no viable pollen, so it cannot serve as a pollinizer.
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.
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.
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: Elstar Pollination, Cool-Climate Dessert & Biennial Habit
Elstar is a diploid, self-sterile cultivar developed at the Institute for Horticultural Plant Breeding (IVT) in Wageningen, Netherlands, from a cross of Ingrid Marie × Golden Delicious (released 1972). Flowering in bloom group 3 (mid-season), it produces fertile pollen and is cross-pollinated effectively by compatible diploids such as Gala, Cox's Orange Pippin, Discovery, and James Grieve.
Parentage exclusions: Because Golden Delicious is a direct parent, Golden Delicious and its sports share S-incompatibility alleles with Elstar and must not be used as exclusive pollination partners.
Premier European dessert apple: Elstar is the dominant fresh-market dessert apple across Western and Central Europe (particularly the Netherlands and Germany), prized for its intense, aromatic sweet-tart flavor with subtle citrus notes and juicy texture.
Canopy management and biennial tendency: The tree is naturally vigorous and prone to biennial bearing if heavy initial fruit sets are left unmanaged. Commercial growers practice prompt chemical thinning within 14 days of full bloom, summer pruning to ensure light penetration for red blush development, and root pruning on overly vigorous rootstocks.
Key Orchard Considerations for Elstar
Excels in maritime and temperate European climates where warm days and cool nights optimize intense sugar-acid balance.
Exclude Golden Delicious as a sole pollination companion due to shared parental S-alleles.
Requires timely early thinning and moderate summer vegetative control to sustain consistent annual return bloom.
Take Elstar 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 Elstar 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.