Trillium grandiflorum

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Trillium Grandiflorum Ii Trillium Grandiflorum I 2014 061 2014 060 Trillium 2014 059
Trillium Grandiflorum Ii Trillium Grandiflorum I 2014 061 2014 060 Trillium 2014 059

Trillium grandiflorum

Common Name: Large-flowered Trillium

Large-flowered Trillium is one of Minnesota’s most recognizable spring wildflowers, growing 8 to 18 inches tall. It produces a single large white flower atop a whorl of three broad leaves, turning pink as it ages. This species thrives in rich deciduous forests and shaded ravines, forming beautiful colonies over time. It is a slow growing but long-lived plant, making it a prized addition to woodland gardens and native shade plantings. Bees and other insects pollinate its flowers, while wildlife may feed on its seeds.

Characteristics

Type Forb
Sun Full Sun, Partial Sun, Shade
Soil Clay, Loam, Peat, Calcareous
Moisture Mesic, Wet
Average Max Height (inches) 21
Suggested Plant Spacing (inches) 12
Bloom month(s) May, June
Bloom Color or Type White
Dominance Medium

Range Maps

Sowing Information

For most homeowners, the recommended method is to hand-broadcast seed at a minimum rate of 16–64 PLS (Pure Live Seed) ounces per acre. To ensure even coverage, broadcast the seed in perpendicular passes across the site. Grass seed should be broadcast first and lightly raked into the soil. Afterward, apply a light mulch layer using clean, seed-free straw or, preferably, our native Little Bluestem straw, available at our retail garden centers. Once mulching is complete, broadcast native wildflower seed over the area without raking it in. A good rainfall or thorough watering will provide sufficient soil contact for successful germination.

Planting Information

Dig a hole in your planting site slightly larger than the plant’s root system. When placing the plant into the hole, ensure that the soil line remains consistent with its original level in the pot. Fill in around the roots with the excavated soil, gently firming it to eliminate air pockets. Water the plant thoroughly the same day to promote successful establishment.