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Biennial

Yellow Evening Star

Mentzelia decapetala

Tenpetal BlazingstarEvening StarCandleflowerGumbo LilyChalk Lily

Yellow Evening Star produces spectacular night-blooming flowers that appear to have ten creamy-white petals surrounding a starburst of golden stamens. These fragrant blooms open at dusk and close before morning, attracting moths and bumblebees.

Plant Family

Loasaceae (Stick-leaf or Loasa family)

Blooming

Summer (June-September), flowers open at dusk

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Yellow Evening Star with white petals and golden stamen burst
Yellow Evening Star with white petals and golden stamen burst

Symbolism & Meanings

Key Meanings

Night beauty
Moonlight magic
Patience
Hidden treasures
Evening splendor

Perfect For

Moon garden celebrationsEvening garden eventsNative plant dedicationsNocturnal wildlife appreciation

Color Meanings

White:Moon-like luminescence and purity
Yellow center:Golden warmth and radiance

Similar flowers: nicotianas and sapodilla flowers also share similar meanings.

Cultural Significance

The genus name Mentzelia honors Christian Mentzel (1622-1701), a German botanist and physician. The species name "decapetala" means "ten petals," though five are actually modified stamens (staminodes). These wide staminodes are unique among Mentzelia species. The common name "candleflower" refers to the closed flowers during daytime, which resemble stubby candles. The plant was collected during the Lewis and Clark Expedition in 1804. Its evening-blooming habit serves nocturnal pollinators including sphinx moths and bees that visit at dusk.
Related cultural flowers:Rose, Strawberry
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Botanical Information

Physical Characteristics

Flower Size: 3-5 inches across (8-13 cm), star-shaped
Plant Size: 1-3 feet tall (30-90 cm), bushy habit
Flower Shape: Star-shaped with apparent ten petals (five true petals plus five wide staminodes), 200-300 stamens in center

Natural Habitat

Native to: Western Great Plains (Alberta and Saskatchewan to Texas and Mexico)
Habitat: Dry prairies, plains, rocky slopes, road cuts, disturbed areas, and alkaline soils
Climate: Semi-arid, Continental, Temperate

Growing Guide

Sunlight

Full sun (at least 8 hours); thrives in harsh, exposed locations

Water

Extremely drought tolerant once established; prefers dry conditions; requires excellent drainage

Soil

Well-drained, Dry, Sandy, Rocky, Alkaline, High lime content, Poor soils

Expert Growing Tips

1

Deep taproot makes transplanting difficult or impossible

2

Best grown from seed sown in place

3

Flowers open near sunset, close before morning

4

Each flower lasts multiple evenings

5

Flowers smell like honey

6

Barbed hairs on leaves can stick to clothing

7

Self-seeds readily in dry, disturbed soils

8

Thrives in full sun and harsh conditions

9

Deer resistant

Uses & Benefits

Ornamental Uses

  • Moon gardens and evening gardens
  • Rock gardens and xeriscapes
  • Native plant gardens
  • Dry slopes and difficult sites
  • Wildlife and pollinator gardens
  • Roadside plantings

Frequently Asked Questions about the Yellow Evening Star

Why does Yellow Evening Star bloom at night?

Yellow Evening Star blooms at night to attract nocturnal pollinators including sphinx moths and other night-flying insects. Flowers open near sunset and close before morning, though they may stay open longer on cloudy days. Each flower blooms for multiple evenings.

Why is it called Tenpetal Blazingstar?

It is called Tenpetal Blazingstar because the flowers appear to have ten petals. However, only five are true petals; the other five are modified stamens called staminodes. These wide staminodes are larger than in any other Mentzelia species.

Can I transplant Yellow Evening Star?

No, Yellow Evening Star has a deep taproot and does not tolerate transplanting. It must be grown from seed sown directly where you want it to grow, or started in deep containers and transplanted very young before the taproot develops.

What does Yellow Evening Star smell like?

Yellow Evening Star flowers have a sweet, honey-like fragrance that is most noticeable in the evening when the flowers are open. This scent helps attract nocturnal pollinators like sphinx moths and night-flying bees.

Available Colors

White
Cream
Pale yellow
Yellow center

Quick Facts

Type:biennial
Family:Loasaceae (Stick-leaf or Loasa family)
Native to:Western Great Plains (Alberta and Saskatchewan to Texas and Mexico)
Blooms:Summer (June-September), flowers open at dusk

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