Hosta 'Grand Slam' | Glossy Dark Green Medium Hosta Benedict Gowen 1990

Description

A Deep Glossy Green Classic From Michigan With Dark Violet Blooms

R. Benedict and H. Gowen of Michigan registered Hosta 'Grand Slam' in 1990 from parentage unknown. Broadly ovate leaves reach 17.8 cm (7") long × 15.2 cm (6") wide with 9 vein pairs, presenting a rich, deep dark green with a high-gloss upper surface that reflects dappled light beautifully in the shade garden. Purplish scapes carry dark violet flowers above the dense, tidy mound. At our nursery, 'Grand Slam' grows to approximately 40.6 cm (16") tall and 86.4 cm (34") wide. Canadian gardeners from Zone 3 through 9 will find it a reliable and handsome medium-sized shade border performer.

  • High-gloss dark green foliage: The upper leaf surface carries a pronounced glossy finish that sets 'Grand Slam' apart in the shade garden — deep, rich dark green with a sheen that catches and reflects dappled light through the season.
  • Dark violet flowers on purplish scapes: Striking dark violet blooms rise on purplish-coloured scapes 53.3 cm (21") tall, adding bold, deep colour contrast above the glossy green foliage canopy.
  • Broadly ovate, substantial leaves: At 17.8 cm (7") long × 15.2 cm (6") wide with 9 vein pairs, the leaves have a satisfying physical presence and good substance that contributes to resilience in the Canadian garden.
  • A Benedict and Gowen Michigan original: Registered in 1990 by two respected Michigan hosta growers, 'Grand Slam' reflects the high selection standards that made R. Benedict and H. Gowen celebrated names in the hosta world — this cultivar is a testament to their eye for outstanding foliage.
  • Tidy medium mound habit: Forms a dense, well-behaved mound that suits the mid-border perfectly — reliable, consistent, and an excellent foil for variegated or gold companion hostas in the shade planting.
Feature Specification
Size (H × W) 40.6 cm × 86.4 cm (16" × 34")
Hardiness Zone 3–9
Colour Glossy dark green; dark violet flowers
Light Requirements Partial to full shade

Grower's Tip: 'Grand Slam' handles Canadian winters with ease from Zone 3 through 9 — site it where dappled morning light can play across the high-gloss leaf surface for maximum effect, as the dark green sheen is most dramatic in the shifting light of a woodland border. We grow it at our nursery in Bécancour, QC and the dark violet flowers on purplish scapes are a reliable late-season highlight. Our True to Type standard means you receive the authentic Benedict and Gowen selection — confirmed before it leaves Bécancour.

Product form

$17.00

    • Next Availability Date: Now
    • Mature Height: 16" (40.64 cm)
    • Mature Spread: 43" (109.22 cm)
    • Seasonal Leaf Change: N/A
    • Hybridizer: Benedict / Gowen
    • Hybridizer (List 2):
    • AHS Registration Year: 1990
    • Canada Breeders' Rights No. / Expiry:
    • US Patent No. / Expiry:
    • Collection: Current Availability
    • Photo Credit: Hosta Choice Gardens (CDN) ©2026
    • Date of Last Update: September 2026
    • Waiting List for this Variety:

    Description

    A Deep Glossy Green Classic From Michigan With Dark Violet Blooms

    R. Benedict and H. Gowen of Michigan registered Hosta 'Grand Slam' in 1990 from parentage unknown. Broadly ovate leaves reach 17.8 cm (7") long × 15.2 cm (6") wide with 9 vein pairs, presenting a rich, deep dark green with a high-gloss upper surface that reflects dappled light beautifully in the shade garden. Purplish scapes carry dark violet flowers above the dense, tidy mound. At our nursery, 'Grand Slam' grows to approximately 40.6 cm (16") tall and 86.4 cm (34") wide. Canadian gardeners from Zone 3 through 9 will find it a reliable and handsome medium-sized shade border performer.

    • High-gloss dark green foliage: The upper leaf surface carries a pronounced glossy finish that sets 'Grand Slam' apart in the shade garden — deep, rich dark green with a sheen that catches and reflects dappled light through the season.
    • Dark violet flowers on purplish scapes: Striking dark violet blooms rise on purplish-coloured scapes 53.3 cm (21") tall, adding bold, deep colour contrast above the glossy green foliage canopy.
    • Broadly ovate, substantial leaves: At 17.8 cm (7") long × 15.2 cm (6") wide with 9 vein pairs, the leaves have a satisfying physical presence and good substance that contributes to resilience in the Canadian garden.
    • A Benedict and Gowen Michigan original: Registered in 1990 by two respected Michigan hosta growers, 'Grand Slam' reflects the high selection standards that made R. Benedict and H. Gowen celebrated names in the hosta world — this cultivar is a testament to their eye for outstanding foliage.
    • Tidy medium mound habit: Forms a dense, well-behaved mound that suits the mid-border perfectly — reliable, consistent, and an excellent foil for variegated or gold companion hostas in the shade planting.
    Feature Specification
    Size (H × W) 40.6 cm × 86.4 cm (16" × 34")
    Hardiness Zone 3–9
    Colour Glossy dark green; dark violet flowers
    Light Requirements Partial to full shade

    Grower's Tip: 'Grand Slam' handles Canadian winters with ease from Zone 3 through 9 — site it where dappled morning light can play across the high-gloss leaf surface for maximum effect, as the dark green sheen is most dramatic in the shifting light of a woodland border. We grow it at our nursery in Bécancour, QC and the dark violet flowers on purplish scapes are a reliable late-season highlight. Our True to Type standard means you receive the authentic Benedict and Gowen selection — confirmed before it leaves Bécancour.

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