Orthocarpus luteus
Orthocarpus luteus
Yellow Owl's Clover
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Taxonomy
Family Orobanchaceae · Genus Orthocarpus
Common Names
Yellow Owl's CloverYellow Owlclover
Context
nativeRegion
Western North America, especially western United States and British Columbia.
usdaZones
3-9
companionPlants
Native grasses, Artemisia, Eriogonum
culturalUses
Primarily valued for native habitat restoration and wildflower gardens.
Care
Care Requirements
LightPrefers full sun but tolerates partial shade.
WateringLow water needs once established; avoid overwatering.
SoilWell-draining, sandy or rocky soils. Not particular about fertility.
FertilizerGenerally not needed; prefers nutrient-poor conditions.
HumidityTolerates low humidity; does not require humid conditions.
TemperatureHardy to cool climates; tolerant of temperature fluctuations.
Growth & Life Cycle
HabitAnnual herb with slender, upright stems.
Mature SizeTypically reaches 15-40 cm tall.
Growth RateModerate growth, completing life cycle in one season.
BloomingBlooms in late spring to early summer with yellow flowers.
DormancyAnnual life cycle; dies back after flowering and seed set.
Propagation
MethodsSeed
DifficultyModerate—requires specific host root association (hemiparasitic).
Best SeasonSow seeds in fall or early spring.
Maintenance & Notes
PruningNo pruning required; remove spent plants after seeding.
RepottingNot recommended for pots due to root parasitism.
Pests & DiseasesGenerally pest-free; resistant to most diseases.
ToxicityNon-toxic to humans and animals.
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