Shinko Asian Pear
Pollination & Compatibility Guide
Shinko Asian pear pollination guide: Bloom Group 1 timing, fire blight resistance, companion pollinizers, and commercial crop thinning.
Shinko is an Asian Pear (Needs Early Bloom Partner)
Asian pear — blooms 7–14 days earlier than European pear on the same site. Partner with another Asian pear (Nijisseiki, Olympic/Korean Giant) as the primary donor; a European pear is at best supplementary. Shinko (Asian Pear) needs at least one compatible pollinizer from bloom group 0–2 to set a reliable crop.
- Chromosome Ploidy
- Diploid (2n)
- Required Companions
- 1 Diploid Partner
- Bloom Group
- Group 1 (Early-Spring)
- Harvest Timing
- Mid (+7d from Conference)
Flowering Period & Overlap Window
Pear flowering periods are compressed into numbered bloom groups (1 through 4). Cross-pollination requires overlapping blossom timing between genetically compatible cultivars, with Asian pears flowering 7–14 days ahead of mid-season European varieties.
Any compatible diploid pear flowering within Group 1 to 2 provides matching blossom overlap.
Compatible Pollination Partners (7)
| Cultivar | Bloom Group | Overlap Type | Harvest | Primary Uses | Interactive Test |
|---|---|---|---|---|---|
| Group 1 | Full Overlap | Late ±7d delta | Fresh Eating, Storage | Test Cross | |
| Group 1 | Full Overlap | Mid ±14d delta | Fresh Eating | Test Cross | |
| Group 2 | Full Overlap | Mid ±14d delta | Fresh Eating, Pickling | Test Cross | |
| Group 2 | Full Overlap | Mid ±21d delta | Fresh Eating, Canning | Test Cross | |
| Group 2 | Full Overlap | Early ±27d delta | Canning, Jelly | Test Cross | |
| Group 2 | Full Overlap | Early ±28d delta | Fresh Eating, Canning | Test Cross | |
| Group 2 | Full Overlap | Early ±32d delta | Fresh Eating | Test Cross |
Incompatible Varieties & Exclusions (1)
These pear varieties overlap in flowering time with Shinko but cannot fertilise it due to non-viable pollen (male-sterile diploids), direct parentage exclusions, or shared incompatibility alleles.
Luscious produces no viable pollen, so it cannot serve as a pollinizer.
Pomological Assessment: Blight Resistance, Heavy Bloom & Fruitlet Thinning
Shinko is one of the most reliable and disease-resistant Asian pear cultivars in commercial production. Originating in Japan, it produces medium-to-large round fruit cloaked in an attractive golden-bronze russet skin. The flesh is dense, crisp, and remarkably sweet, with a distinctive butterscotch or caramel undertone.
Flowering occurs early in the spring (Bloom Group 1), aligning with Nijisseiki and Olympic. Shinko produces abundant, viable pollen and serves as a dependable reciprocal donor for other early-blooming Asian pears. The tree sets excessively heavy flower clusters, demanding prompt hand-thinning to one fruitlet per cluster within 30 days of petal fall to maintain commercial fruit size and prevent biennial bearing cycles.
The tree is naturally spreading with medium vigour, producing sturdy lateral spurs that support substantial fruit weight. Russet skin protects fruit from superficial marking during harvest, making it easier to handle and pack than smooth-skinned Asian cultivars. Commercial orchardists find Shinko exceptionally easy to manage due to its low disease susceptibility and dependable annual production of high-quality fruit.
Key Orchard Considerations for Shinko
Performs best on Pyrus betulaefolia or Pyrus calleryana rootstocks in southern and mid-temperate regions, and OHxF 87 in cooler areas. Incompatible with Quince rootstocks.
Demonstrates the highest fire blight resistance among major commercial Asian pear cultivars, making it the preferred choice for humid regions with severe blight pressure. Moderate resistance to Alternaria black spot.
Picks late mid-season, approximately two to three weeks after Nijisseiki. Russet skin protects fruit from superficial marking during harvest. Stores exceptionally well, holding firmness for up to 4 months at 0°C.
Take Shinko 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 Shinko 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.