Rue is used in small amounts to expel poisons from the system, such as those from snake bites, scorpion, spider, or jellyfish bites. It should not be taken with meals, and it should never be used by pregnant women. Juices from the fresh plant can cause the skin to blister. It is used internally and externally as a remedy for tendonitis. Use only under the guidance of a professional, as this herb is poisonous in any but small doses.
Rue is a bushy perennial growing to 2 to 3 feet tall. It is found in average to poor soils throughout North America, and prefers full sun. Rue is often very irritating to the skin of many individuals, so it is advisable to use gloves when working with this plant. Locate it where you won't be accidentally brushing against it in the garden, especially since it has adverse effects on other plants growing nearby.