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Trillium

Trillium grandiflorum

outdoor

Trillium grandiflorum, the Large-flowered Trillium, is a woodland wildflower native to eastern North America renowned for its pure white three-petaled flowers that emerge in spring. This slow-growing perennial thrives in shaded, moist woodland settings and is an iconic woodland garden plant. The flowers mature to pink and eventually deep red as they age, adding to their ornamental appeal.

Trillium

Common Problems

Select the problem your Trillium is experiencing to get a treatment guide.

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Yellow Leaveschevron_right
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Slow Growthchevron_right
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Wiltingchevron_right

Care Guide

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Light
Partial to full shade; prefers dappled light under deciduous trees; avoid direct afternoon sun
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Water
Consistently moist soil during growing season; prefers woodland conditions with leaf mulch that retains moisture
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Soil
Rich, organic, humus-dense soil similar to forest floor; slightly acidic pH preferred (6.0–6.5)
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Fertiliser
Minimal fertilization needed; apply leaf mulch annually in autumn which gradually decomposes providing nutrients
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Temperature
Hardy perennial; cold-hardy in northern climates; prefers cool conditions and benefits from winter chilling
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Humidity
High humidity preferred; thrives in woodland environments with consistent moisture and humid air

Toxicity

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Non-toxic; however, this plant is protected in many regions and collection from wild is illegal

Common Diseases

coronavirusLeaf Spotchevron_rightcoronavirusRoot Rotchevron_right

Common Pests

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Seasonal Care

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Resume regular watering and feeding as growth picks up.

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Peak growing season. Water and feed regularly.

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Reduce watering as growth slows. Stop heavy feeding.

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Minimal watering and feeding. Protect from frost if needed.