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PlantSnap
Plant Care
Masterwort
(Imperatoria ostruthium)
Also Known As
Masterwort, Garden angelica, Imperatoria
About This Plant
Imperatoria ostruthium is a perennial herbaceous plant that belongs to the Apiaceae family. It is also known as masterwort or master root. The plant has deeply cut leaves and produces large, showy, dome-shaped umbels of tiny white or pink flowers. The plant is native to Europe and western Asia.
Plant Care Instructions
Outdoor Size Range
24-36 inches (60-90 cm)
Light Requirements
Masterwort requires partial shade to full sun. It can tolerate some shade but prefers full sun.
Humidity Needs
Masterwort prefers moderate to high humidity levels. You can increase humidity by placing a tray of water near the plant or using a humidifier.
Fertilizing Schedule
Fertilize the plant once a month during the growing season with a balanced fertilizer. Do not fertilize during the winter months.
Pruning Guidelines
Prune the plant in the spring to remove any dead or damaged foliage. You can also cut back the plant after it has finished flowering to promote bushier growth.
Common Pests and Diseases
Masterwort is relatively pest-free, but it can be susceptible to aphids and spider mites. Treat infestations with insecticidal soap or neem oil.
Indoor Size Range
12-24 inches (30-60 cm)
Watering Schedule
The plant prefers moist soil, but it can tolerate some dryness. Water the plant regularly during the growing season, but reduce watering during the winter months.
Temperature Range
The plant prefers cool to moderate temperatures between 50-75°F (10-24°C). It is hardy to USDA zones 4-8.
Growing Season
Masterwort blooms from mid to late summer.
Growing Difficulty Level
Masterwort is moderately difficult to grow. It requires specific growing conditions, such as cool temperatures and moderate humidity levels. However, it is relatively pest-free and does not require much pruning.
USDA Hardiness Zones
USDA hardiness zones 4-8.
Did You Know?
In the Middle Ages, masterwort was believed to have magical properties and was used to ward off evil spirits and protect against the plague.
