Yellow trillium (Trillium luteum)

Yellow trillium

Also known as: Wood Lily

The morphology of Trillium luteum is quite interesting. This charming woodland plant doesn't have a true stem or regular leaves. The "stem" is actually the rhizome extension, while the "leaves" are bracts formed around the flower. Yellow trillium goes dormant after the flowering phase, which happens in mid-summer. Its active period starts in late winter.

Scientific classification

Species

Yellow trillium (Trillium luteum)

Lilies, supplejacks and allies

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Perennial

Lifespan

Herb

Plant Type

Spring

Bloom Time

20 cm to 46 cm

Plant Height

30 cm to 45 cm

Spread

Green, Gray, Silver

Leaf Color

2.5 cm to 8 cm

Flower Size

Green, White

Fruit Color

Yellow, Green

Flower Color

Slow

Growth Rate

Images of Yellow trillium

Quickly Identify Yellow trillium

Distinctive trio of broad, green leaves in a whorl

Upright flowering stalk with lemon-yellow petals

Smooth, unbranched stems with distinct green to reddish color

Elliptical leaves with mottled green to gray-green pattern

Fruit is berry-like, changing from green to greenish-white with purple streaks

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Care Guide for Yellow trillium

Every week

Water

Partial sun

Sunlight

5 - 32 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Yellow trillium thrives in moist, well-drained soil found in deciduous forest understories. It prefers consistent moisture without being waterlogged, benefiting from weekly watering. Mulching is recommended to retain moisture during dry spells, ensuring optimal growth by mimicking its natural habitat.

Fertilize: Fertilize yellow trillium in early spring with balanced, slow-release fertilizer, and use high-phosphorus midseason for blooming. Apply granules at suggested rates around the drip line, avoiding foliage. Adjust frequency with seasons and be cautious of over-fertilization to protect the root system for vigorous growth and blooms.

Pruning: Yellow trillium, known for its yellow flowers and three-petaled structure, needs minimal pruning, typically in early to late spring post-flowering. Focus on removing dead or damaged parts to enhance health and aesthetics, while avoiding heavy pruning to reduce stress and support vigor.

Propagation: Renowned for its mottled foliage and lemon-yellow blooms, yellow trillium thrives when propagated via division. Separate mature rhizomes post-dormancy, ensuring each segment has part of the rhizome and some foliage. Careful handling maintains root integrity, promoting robust growth in shady woodland settings.

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