Cultivar 376: Thiessen

Thiessen is a saskatoon selection of Amelanchier alnifolia. It is described as a native seedling selection from the North Saskatchewan River and as a cultivar introduced through Lakeshore Nurseries of Saskatoon. Sources tie it to Lakeshore Nurseries and place it in 1976. It was recommended for both more favorable and less favorable prairie zones, which suggests broad usefulness across the Prairie Provinces. [S2] [S1]

Sources describe Thiessen as a large fruited saskatoon with berries up to about 10 mm in diameter and with good flavor. The available evidence here does not add more detail on skin color, flesh, or processing quality. It consistently presents Thiessen as a named fruiting selection, not a wild type gathered only for local use. [S1]

Its prairie history is tied to western Canadian nursery and selection work, not to a formal breeding cross recorded here. The record identifies it as an A. alnifolia seedling, not as a cultivar with stated named parents. The evidence supports selection from native material, not documented controlled parentage. [S1] [S2]

Hardiness evidence is split by geography. A prairie fruit guide says hardiness is generally not a limiting factor for saskatoons and lists Thiessen for both more favorable and less favorable prairie zones. A Manitoba guide for northern conditions instead advises avoiding Thiessen because it flowers early and may be damaged by late spring frosts. The best reading is that Thiessen is prairie adapted, but its early bloom can be a liability in colder, frost prone northern sites. [S1] [S3]

Thiessen is part of the prairie saskatoon tradition that also includes cultivars such as Honeywood, Pembina, and Smoky. It appears in recommendation and index sources as one of the standard named selections for the region. Within that group, its distinguishing trait in this evidence set is its relatively large fruit. [S1] [S2]

Summary source basis

• S1: Tree fruit production for the Prairie Provinces
• S2: An index of fruit cultivars tested or developed on the Canadian prairies.
• S3: Fruit Crops for Northern Manitoba

This summary currently draws chiefly from Tree fruit production for the Prairie Provinces, with 2 additional supporting sources linked below.

Featured source descriptions

“Native selection from the North Saskatchewan River.”
— ^[3]

“Good flavor.”
— ^[3]

“Also listed under saskatoons for less favorable zones.”
— ^[3]

“Thiessen is explicitly listed as a cultivar to avoid.”
— ^[1]

Direct parent cultivars

• No direct linked parent cultivars promoted yet.

Parentage claim text

• No direct breeding_cross claim text yet.

Derived or downstream cultivar links

• No derived or downstream lineage links yet.

Source-story quotations

• Avoid varieties Martin and Thiessen because they are early flowering and may not survive late spring frosts.Fruit Crops for Northern Manitoba, p15
• Avoid varieties Martin and Thiessen because they are early flowering and may not survive late spring frosts.Fruit Crops for Northern Manitoba, p15
• Mid Late Season: Thiessen, Martin, NelsonRecommended fruit Varieties, p2

Taxonomy context: No family-tree context surfaced yet.

Related cultivars mentioned in source context