Is President plum self-fertile or self-sterile?

President European Plum is a self sterile cultivar. It is self-sterile and requires 1 compatible pollination partner flowering within Bloom Groups 3–5 to achieve a reliable commercial fruit set.

Can President act as a pollen donor for other plums?

Yes. President European Plum produces viable, fertile pollen that readily cross-pollinates other compatible plum varieties flowering across its bloom window.

Which bloom group does President plum belong to?

President European Plum flowers in Bloom Group 4 (Mid-Spring). It reliably cross-pollinates with compatible cultivars in its own group or immediately adjacent groups (±1 bloom group).

Which plum pollination pool does President belong to?

President European Plum belongs to Pool A (European plum, gage and damson). A compatible pollen partner must flower in the same or an adjacent bloom group and belong to the same pool. European and Japanese plum pools do not cross-pollinate.

Curated Pomology Guide · Bloom Group 4

President European Plum
Pollination & Compatibility Guide

President plum pollination guide: Group 4 Pool A partner requirement, viable pollen and late dessert or culinary cropping.

Pomological Verdict & Botanical Profile

President Needs a Compatible Pool A Partner

Same-Pool Pollen Required

Named as Coe's Golden Drop's partner despite itself requiring a partner. Own partners: Victoria, Marjorie's Seedling, Stanley. President (European) needs at least one compatible pollinizer from bloom group 3–5 to set a reliable crop.

Pollination Pool / Ploidy: Pool A · Hexaploid (functional diploid)
Required Companions: 1 Compatible Partner
Bloom Group: Group 4 (Mid-Spring)
Harvest Timing: Late Season

Primary Uses:Fresh EatingStorage

Disease Resistance: Moderate disease resistance

Flowering Period & Overlap Window

Plum bloom groups run from 1 to 5. A useful partner flowers in the same or adjacent group and belongs to the same pollination pool. European plums, gages and damsons are Pool A; Japanese plums and prairie hybrids are Pool B. A tree from one pool cannot pollinate the other.

Flowering Overlap Range for President

Early Overlap

Group 3

President

Group 4

Late Overlap

Group 5

For President, select a compatible plum in the same pollination pool flowering from Group 3 to 5; bloom overlap alone does not bridge Pool A and Pool B.

Compatible Pollination Partners (9)

Test in Checker

Cultivar	Bloom Group	Overlap Type	Harvest	Primary Uses	Interactive Test
Cambridge GageGuide	Group 4	Full Overlap	Mid	Fresh Eating	Test Cross
Damson (Shropshire)Guide	Group 4	Full Overlap	Late	Cooking, Jam, Jelly	Test Cross
Mirabelle de Nancy (European)Guide	Group 4	Full Overlap	Mid	Fresh Eating, Brandy (Eau de Vie)	Test Cross
Victoria (European)Guide	Group 3	Full Overlap	Mid-Late	Fresh Eating, Canning, Jam	Test Cross
Blue DamsonGuide	Group 3	Full Overlap	Mid-Late	Cooking, Preserves	Test Cross
French Prune (Agen)Guide	Group 3	Full Overlap	Late	Drying (Prune), Cooking	Test Cross
Italian Prune (Fellenberg)Guide	Group 3	Full Overlap	Late	Prune, Drying, Canning	Test Cross
Opal (European)Guide	Group 3	Full Overlap	Early	Fresh Eating	Test Cross
Stanley (European)Guide	Group 3	Full Overlap	Mid-Late	Prune, Fresh Eating, Canning	Test Cross

Incompatible Varieties & Exclusions (4)

These cultivars cannot serve as pollinizers for President because of a different plum pollination pool, a documented incompatibility or another exclusion in the source data.

Green Gage (Reine Claude)Guide

plum incompatibility groups are only partly mapped, so only cultivars documented as reliable donors are offered. Green Gage (Reine Claude) is not one of them — that is a gap in the data, not evidence it is incompatible.

Imperial Epineuse (Prune)

plum incompatibility groups are only partly mapped, so only cultivars documented as reliable donors are offered. Imperial Epineuse (Prune) is not one of them — that is a gap in the data, not evidence it is incompatible.

Moyer Supreme (Prune)

plum incompatibility groups are only partly mapped, so only cultivars documented as reliable donors are offered. Moyer Supreme (Prune) is not one of them — that is a gap in the data, not evidence it is incompatible.

Yellow Egg Plum (European)

plum incompatibility groups are only partly mapped, so only cultivars documented as reliable donors are offered. Yellow Egg Plum (European) is not one of them — that is a gap in the data, not evidence it is incompatible.

Grower Commentary: President as Crop and Donor

President is a Group 4 European plum in Pool A and needs a compatible partner for its own crop. It produces viable pollen and is named as a donor for another cultivar in the source material, so needing a partner does not make it pollen-sterile. Victoria or Stanley offers a practical same-pool starting point when bloom overlaps. Japanese plums belong to Pool B and cannot supply the missing pollen.

President's later blossom can help extend pollen coverage in a mixed European block, but a late label does not guarantee simultaneous flowers on every site. Check the actual open-bloom days against its companion, particularly where a warm spring compresses flowering. If set is uneven, first distinguish frost damage and poor bee flight from incompatibility; another row of the wrong pool will not solve either issue.

Fruit can serve dessert and culinary outlets, so plan harvest labour around grade and use rather than stripping every tree together. Assess crop load after natural drop, thinning branches that would bend or break under full fruit weight. A bush on St Julien A or Torinel keeps picking reachable; a larger Myrobalan frame needs more row width and a different harvest plan. Keep the tree open to light late in the season.