Updated: July 30, 2023

Ruda, also known as Ruta graveolens, is a perennial herb that is native to the Mediterranean region. It has been cultivated for centuries and is well-known for its medicinal and culinary uses. One of the common questions that people have about this plant is how tall it can grow. In this article, we will explore the growth habits of the Ruda plant and provide some tips on how to care for it.

Growth Habit

The height of a Ruda plant can vary depending on several factors, including the growing conditions and the age of the plant. On average, Ruda plants typically reach a height of about 2 to 3 feet (60 to 90 cm). However, under ideal conditions, they can grow up to 4 feet (120 cm) tall.

Ruda plants have a compact and bushy growth habit with multiple stems. The stems are woody at the base and become more herbaceous towards the top. The leaves are bluish-green in color and are deeply divided into segments, giving them a feathery appearance. The plant produces small yellow flowers in clusters during the summer months, which are followed by small fruits that contain numerous tiny seeds.

Growing Conditions

To ensure optimal growth and development of your Ruda plant, it is important to provide it with the right growing conditions. Here are some key factors to consider:

Sunlight

Ruda plants thrive in full sun to partial shade. Ideally, they should receive at least 6 hours of direct sunlight per day. Without adequate sunlight, the plant may become leggy and fail to reach its full height potential.

Soil

Ruda plants prefer well-draining soil that is rich in organic matter. They can tolerate a wide range of soil pH levels, but slightly acidic to neutral soil is usually recommended. If your soil is heavy or clayey, consider amending it with organic matter, such as compost, to improve drainage.

Watering

While Ruda plants are drought-tolerant once established, they still require regular watering, especially during hot and dry periods. Ensure that the soil is evenly moist but not waterlogged. Overwatering can lead to root rot and other fungal diseases.

Temperature and Humidity

Ruda plants are hardy in USDA zones 4 to 9. They can tolerate a wide range of temperatures, but they prefer moderate temperatures between 60 to 75°F (15 to 24°C). High humidity is not a requirement for their growth but can be beneficial in preventing the leaves from drying out.

Caring for Ruda Plants

In addition to providing the right growing conditions, there are a few care practices that can help promote healthy growth and maximize the height of your Ruda plant:

Pruning

Regular pruning is essential for maintaining the compact and bushy shape of Ruda plants. Prune back any dead or damaged stems and remove any excessive growth to encourage branching. Pruning can be done in early spring or after the flowering period.

Fertilizing

Ruda plants are not heavy feeders, but they can benefit from a light application of balanced fertilizer in early spring. Use a slow-release fertilizer or organic compost to provide nutrients gradually throughout the growing season.

Mulching

Applying a layer of organic mulch around the base of the plant can help conserve moisture, suppress weed growth, and regulate soil temperature. Avoid placing the mulch directly against the stems to prevent rotting.

Pest and Disease Control

Ruda plants have natural insect-repellent properties due to their strong aroma. However, they may still be susceptible to some common garden pests, such as aphids and spider mites. Regularly inspect your plants for signs of infestation and take appropriate measures, such as using organic insecticidal soaps or introducing beneficial insects, to control the pests. Additionally, ensure good air circulation around the plant to prevent fungal diseases.

Conclusion

In conclusion, Ruda plants typically grow to a height of 2 to 3 feet (60 to 90 cm), but can reach up to 4 feet (120 cm) under optimal conditions. To ensure their optimal growth, provide them with full sun to partial shade, well-draining soil, regular watering, and moderate temperatures. Regular pruning, fertilizing, mulching, and pest control measures can help promote healthy growth and maximize their height. By following these care practices, you can enjoy the beauty and benefits of a thriving Ruda plant in your garden.