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PlantSnap
Plant Care
Fernald's iris
(Iris fernaldii)
Also Known As
Fernald's iris, Maine iris
About This Plant
Iris fernaldii is a species of flowering plant in the family Iridaceae, native to the northeastern United States. It is a herbaceous perennial that grows up to 60 cm tall, with narrow leaves and showy purple flowers that bloom in late spring to early summer.
Plant Care Instructions
Outdoor Size Range
Height: 10-24 inches (25-60 cm), Spread: 6-12 inches (15-30 cm)
Light Requirements
Iris fernaldii prefers full sun to partial shade. It requires at least 6 hours of direct sunlight per day.
Humidity Needs
Iris fernaldii prefers average humidity levels, but can tolerate dry conditions.
Fertilizing Schedule
Fertilize Iris fernaldii once a year in the spring with a balanced, slow-release fertilizer.
Pruning Guidelines
Remove spent flowers and yellowing leaves to promote new growth. Cut back the foliage to the ground in the fall after it has turned brown.
Common Pests and Diseases
Iris fernaldii is relatively pest-free, but can be susceptible to iris borer and thrips.
Indoor Size Range
Not suitable for indoor cultivation
Watering Schedule
Iris fernaldii prefers moist, well-draining soil. Water deeply once a week during the growing season, and reduce watering in the fall and winter.
Temperature Range
Iris fernaldii is hardy in USDA zones 4-8. It prefers cool to moderate temperatures and can tolerate frost.
Growing Season
Late spring to early summer
Growing Difficulty Level
Iris fernaldii is moderately difficult to grow. It requires well-draining soil and can be susceptible to root rot if overwatered. It also requires a period of dormancy in the fall and winter.
USDA Hardiness Zones
4-8
Did You Know?
Iris fernaldii is named after Merritt Lyndon Fernald, an American botanist who specialized in the flora of New England.
