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Plant Profile: Boris Avens (Geum x borisii)

Geum borisiiThis clump forming herbaceous perennial is the result of a cross between Geum bulgaricum and Geum reptans and a member of the rose family (Rosaceae) that also includes apples, pyracantha, and lady’s mantle. Wiry stems are branched and form mounds of trifoliate leaves with rounded terminal lobes that are twice the size of the lateral lobes. The bright orange flowers are one to two inches wide, and are carried above the foliage on branched stems from late spring to early summer. Fluffy seed heads may follow. Plants do best in cool climates and do not thrive in areas with high heat and humidity or wet soil in winter. A good choice for front of the border, rock garden, or container. The genus name Geum is the Latin name for the plant. The species name borissi honors to King Boris of Bulgaria (1894-1941).

Type: Herbaceous perennial

Bloom: Bright orange flowers one to two inches wide, carried above the foliage on branched stems from late spring to early summer

Size: 9-12” H x 12” W

Light: Full sun; part shade in hot climates

Soil: Average, moderately moist, well-drained

Hardiness: Zones 3-7

Care: Deadhead to prolong bloom

Pests and Diseases: None of significance

Propagation: Division

Companion Plants: Italian bugloss (Anchusa azurea), coral (Heuchera) bells with coppery foliage, columbine

Outstanding Selections: ‘Georgenburg’ (pale yellow flowers)