Fruit tree comparisons
 Opal |  Elstar | |
|---|---|---|
| Opal is an early European plum variety with a good flavor, self-fertile and very easy to grow. | Elstar is an attractive apple with a well-balanced honeyed flavor. | |
| remove | remove |
Growing
| Plum tree Opal | Apple trees Elstar | |
|---|---|---|
| Gardening skill | Beginner | Average |
| Self-fertility | Self-fertile | Not self-fertile |
| Pollination group | 3 | 3 |
| Pollinating others | Average | Average |
Using
| Plum tree Opal | Apple trees Elstar | |
|---|---|---|
| Picking season | Early | Late |
| Uses | Eating fresh | Eating fresh |
| Keeping (of fruit) | 1-3 days | 1-2 months |
Disease resistance
| Plum tree Opal | Apple trees Elstar | |
|---|---|---|
| General resistance | Good | Poor |
| Fireblight | Some susceptibility | |
| Scab | Some susceptibility | |
| Mildew | Some susceptibility |
Climate
| Plum tree Opal | Apple trees Elstar | |
|---|---|---|
| Cold hardiness (USDA) | Zone 4 (-34C) | Zone 5 (-29C) |
| Summer maximum temperatures | Cold (< 20C / 67F) Cool ( 20-24C / 68-75F) Warm (25-30C / 76-85F) | Cool ( 20-24C / 68-75F) Warm (25-30C / 76-85F) |
Identification
| Plum tree Opal | Apple trees Elstar | |
|---|---|---|
| Country of origin | Sweden | Netherlands |
| Period of origin | 1900 - 1949 | 1950 - 1999 |
| Fruit color | Red | Orange flush |