Jonathan Apple
Pollination & Compatibility Guide
Jonathan apple pollination guide, bloom group 3 overlap, and compatible partners. Complete guide to heavy cropping, fire blight, and mildew control.
Jonathan is Self-Sterile (Needs 1 Partner)
Jonathan 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 (81)
| 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 |
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 |
Westfield Seek-No-Further | Group 3 | Full Overlap | Mid ±5d delta | Fresh Eating | Test Cross |
Incompatible Varieties & Exclusions (25)
These varieties overlap in flowering time with Jonathan but cannot fertilise it due to sterile pollen (triploids) or shared genetic incompatibility alleles.
A direct parent (Jonathan × Worcester Pearmain) — roughly half the pollen is non-functional, so it is not a reliable partner.
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.
A direct parent (Esopus Spitzenburg × unknown) — roughly half the pollen is non-functional, so it is not a reliable partner.
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 (Jonathan × Wagener) — roughly half the pollen is non-functional, so it is not a reliable partner.
A direct parent (Golden Delicious × Jonathan) — roughly half the pollen is non-functional, so it is not a reliable partner.
A direct parent (Jonathan × McIntosh) — roughly half the pollen is non-functional, so it is not a reliable partner.
A direct parent (Cox's Orange Pippin × Jonathan) — roughly half the pollen is non-functional, so it is not a reliable partner.
A direct parent (Jonathan × Winesap) — roughly half the pollen is non-functional, so it is not a reliable partner.
A direct parent (Jonathan × 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.
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.
A direct parent (Jonathan × Duchess of Oldenburg (recorded as 'Borowitsky')) — roughly half the pollen is non-functional, so it is not a reliable partner.
Zabergau Reinette produces no viable pollen, so it cannot serve as a pollinizer.
Grower Commentary: Jonathan Pollination, Yield Potential & Disease Risk
Jonathan is an American heritage diploid apple cultivar discovered as an Esopus Spitzenburg chance seedling in Woodstock, New York (c. 1826). Flowering in bloom group 3 (mid-season), it produces abundant, highly fertile pollen and has served as a foundational pollinizer and parent in commercial pomology for over a century.
Major breeding exclusions: Jonathan is the direct parent of renowned commercial cultivars including Jonagold (Golden Delicious × Jonathan), Idared (Jonathan × Wagener), Melrose (Jonathan × Red Delicious), and Jonamac (Jonathan × McIntosh). Due to shared incompatibility alleles, none of these descendants can serve as reliable sole cross-pollinizers for Jonathan, and triploid offspring like Jonagold donate no viable pollen back.
Cropping and culinary excellence: Highly precocious and dependable annual bearer of medium-sized, high-acid, spicy fruit that serves as the benchmark for processing, pies, and hard cider blending.
Severe disease vulnerabilities: Jonathan is notoriously susceptible to fire blight (Erwinia amylovora), powdery mildew (Podosphaera leucotricha), and Jonathan spot in storage. Strict preventative bactericide programs during bloom and proactive summer fungicide coverage are essential.
Key Orchard Considerations for Jonathan
Extreme vulnerability to fire blight and powdery mildew requires aggressive preventative spray schedules from early green tip through petal fall.
Avoid direct offspring including Jonagold, Idared, Melrose, and Jonamac as solitary pollination partners.
Regular, heavy annual cropping on moderate-vigor trees that respond well to standard central leader pruning.
Take Jonathan 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 Jonathan 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.