A Bold and Beautiful Heart of the Garden
Hosta 'American Sweetheart' is a stunning, large-sized cultivar that brings a high-definition pop of contrast to the Canadian shade garden. Registered in 2002 by Hans Hansen and Walters Gardens, this variety is a tetraploid sport of the classic 'Sea Thunder', which grants it a significantly thicker leaf substance and much greater garden vigour. It features upright, heart-shaped leaves with a brilliant, snow-white centre that is dramatically framed by an extra-wide, dark green margin. This "flaming" variegation pattern creates a luminous focal point that holds its integrity beautifully from its spring emergence right through the humid peak of a Canadian July.
Why It Stands Out
-
Crisp Tetraploid Contrast: The pure white centre stays bright and stable, providing a sharp "halo" effect against the saturated green borders.
-
Improved Leaf Substance: Being a tetraploid, it boasts thick, leathery foliage that offers elite resistance to slug damage compared to its parentage.
-
Upright Architectural Habit: Forms a dense, vase-shaped mound that adds vertical interest and allows for smaller companion plants to be tucked around its base.
-
Luminous Shaded Glow: The wide white centres act as a natural reflector, illuminating the darkest corners of your woodland landscape.
-
Lavender Summer Spikes: Produces elegant lavender flowers on sturdy, upright scapes in mid-to-late summer, attracting local pollinators.
Technical Specs
| Feature |
Details |
| Size |
60 cm Height / 105 cm Width |
| Hardiness Zone |
Canadian Zones 3–9 |
| Colour |
Pure White centre with Wide Dark Green margins |
| Light |
Partial Shade to Full Shade |
Grower's Tip
To keep the white centre of 'American Sweetheart' pristine, site it in a location with filtered light or deep shade; while its tetraploid nature makes it tougher than most white-centred hostas, protection from the parching afternoon sun prevents leaf stress. At our nursery in Bécancour, QC, we meticulously monitor this variety during its spring emergence to ensure the wide green margins and brilliant white core are perfectly defined. Per our "True to Type" mandate, we never ship until we visually verify the health and traits of each plant, ensuring you receive a verified, robust plant ready for your landscape.
