Trillium Grandiflorum

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Trillium Grandiflorum - Great White Trillium 

Trillium Grandiflorum is a monocotyledonous, herbaceous, woodland, long-lived, perennial wildflower primarily found in eastern North America. It is also known as the white trillium, great white trillium, large-flowered trillium, and white wake-robin.

 This is a great plant to add to your garden because of its vibrant green foliage and beautiful white flowers. Among the trillium plants, this one has the most giant flowers. Also, since it is a perennial plant, you don’t have to worry about replanting it every growing season. 

Characteristics of Trillium Grandiflorum

 Trillium Grandiflorums have short, thick rhizomes that produce a stem that grows between 15 and 45 cm tall. The leaves, called bracts, are usually round-ovate to sub-rhombic and grow between 8 and 15 cm wide and 10 to 30 cm long. 

The stem has an erect pedicel between two and ten cm long where the flowers grow. The plant flowers between late April and early June, depending on the elevation and latitude you grow it in. The flowers usually have three white petals, measuring four to seven cm long, depending on the age and vigor of the plant. 

They have a shape similar to the leaves but curve outwards, recurve in the middle to create a funnel-shaped corolla with a yellow center, and sometimes change to pink as they grow. They also have venation. But not as apparent as that on the leaves. 

There are three flat, acuminate, green sepals below the flowers, with maroon or dark maroon streaks. Their color is usually paler than the leaves, spreading around 2.5-5 cm. 

 The flowers have a slender and straight stigma narrowing at the end, six stamens in two verticils of three, and white, short styles with yellow tips because of pollen. After flowering, the plant produces a pale green, six-angled, and ovoid berry with brown seeds. 

What are the growing conditions of Trillium Grandiflorum?

 Trillium Grandiflorum does best in hardiness zones 4-8 and heat zones 3-7. the best climate zones for the plant are 6,5,4,3B, 3A, 2B, 2A, 2, 1B, 1A, and 1. The best soil for them is moist, well-drained, and neutral to acidic loam, clay, or sand rich in organic matter. They also do well in a shady place or with partial sun exposure. Therefore, consider planting them under other trees. If you are looking for companion plants, go for the ones with similar needs, like epimediums. 

If you are planting several of these plants, ensure you give them about 30 cm spacing and plant them about 10 cm deep. You can grow them as border plants or decorative accent plants around the garden. 

Buy Trillium Grandiflorom online at Nance Plants.


1. Do Trillium grandiflorum like sun or shade?

A. Trillium grandiflorum is a woodland perennial that prefers partial to full shade.

2. When is the best time to plant Trillium grandiflorum?

A. Trillium grandiflorum plants are typically best planted in the fall, allowing them to establish their root systems before the onset of winter.

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  • 5
    Trillium Grandiflorum

    Posted by Trillium Grandiflorum on Mar 20, 2023

    Great looking roots. Planting today.

  • 5
    trillium grandiflorum

    Posted by Great White Trillium on Mar 09, 2023

    These are my favorite wildflower. The white trillium begin to turn pink after a few weeks of bloom and they are the most stunning flower in my yard.

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