Rubrum Pennisetum: The Ornamental Grass You Need In Your Garden

Are you looking for a way to add color and texture to your garden? If so, then you need to consider adding Rubrum Pennisetum. This ornamental grass is known for its vibrant red-purple leaves and soft, fluffy plumes. Not only is it beautiful, but it's also easy to grow and maintain. In this blog post, we'll explore everything you need to know about Rubrum Pennisetum, from its origins to its care requirements.

Origins of Rubrum Pennisetum

Rubrum Pennisetum, also known as Purple Fountain Grass, is native to Africa, particularly in the regions of Ethiopia, Somalia, and Sudan. It's a member of the Poaceae family, which includes over 10,000 species of grasses. Rubrum Pennisetum was first introduced to the United States in the 1990s and has become a popular choice among gardeners and landscapers ever since.

The Beauty of Rubrum Pennisetum

One of the key features of Rubrum Pennisetum is its stunning foliage. The leaves are a deep red-purple color, which can add a pop of color to any garden. Additionally, the leaves are long and slender, creating an elegant, feathery appearance. But the beauty of this ornamental grass doesn't stop there. During the summer months, Rubrum Pennisetum produces soft, fluffy plumes that can reach up to three feet tall. The plumes off a creamy-white color before turning a light pink, and finally, a reddish-brown color.

Growing Conditions

Rubrum Pennisetum is a versatile plant that can thrive in a variety of growing conditions. It prefers full sun but can tolerate partial shade, making it a great option for gardens with varying amounts of sunlight. It also prefers well-drained soil and doesn't like to be overwatered. If you live in an area with heavy rainfall, make sure to plant Rubrum Pennisetum in an area with good drainage or amend the soil to improve its drainage capabilities.

Planting Rubrum Pennisetum

When planting Rubrum Pennisetum, it's important to choose the right location. As mentioned earlier, it prefers full sun but can tolerate partial shade. Make sure to choose an area with well-draining soil, and avoid planting it in areas that are prone to flooding. You can Rubrum Pennisetum from seeds or purchase young plants from a local nursery. When planting, make sure to space them about two to three feet apart to give them room to grow.

Care Requirements

Rubrum Pennisetum is a low-maintenance plant that doesn't require a lot of care. However, there are a few things you can do to ensure it stays healthy and vibrant.

Watering

As mentioned earlier, Rubrum Pennisetum doesn't like to be overwatered. During the first year of growth, make sure to water it regularly to help establish its root system. After that, it only needs to be watered during periods of drought.

Fertilizing

Rubrum Pennisetum doesn't require a lot of fertilizer, but you can fertilize it once a year with a slow-release fertilizer to promote healthy growth.

Pruning

In the fall, after the plumes have faded and turned brown, you can prune back Rubrum Pennisetum to about six inches above the ground. This will help stimulate new growth in the spring.

Landscape Uses of Rubrum Pennisetum

Rubrum Pennisetum is a versatile plant that can be used in a variety of landscape designs. Here are a few ways you can incorporate it into your garden:

As a Border Plant

Rubrum Pennisetum's vibrant color makes it an excellent choice for border plants. Its slender leaves and soft plumes can create a natural, flowing border between different sections of your garden.

In Containers

Rubrum Pennisetum can also be grown in containers, making it a great option for those with limited garden space. Pair it with other plants that have contrasting foliage or textures to create a visually stunning display.

In Mass Plantings

If you have a large area to fill, consider planting Rubrum Pennisetum in mass plantings. Its feathery plumes can create a soft, elegant look that's perfect for large open spaces.

FAQs

Q: Is Rubrum Pennisetum invasive?

A: No, Rubrum Pennisetum is not considered invasive. However, it can self-seed and spread if not properly maintained.

Q: Can Rubrum Pennisetum be grown in containers?

A: Yes, Rubrum Pennisetum can be grown in containers. Just make sure to choose a container that's large enough to accommodate its root system.

Q: How often should I fertilize Rubrum Pennisetum?

A: Rubrum Pennisetum only needs to be fertilized once a year with a slow-release fertilizer.

Q: When should I prune Rubrum Pennisetum?

A: Prune Rubrum Pennisetum in the fall, after the plumes have faded and turned brown.

Q: What pests and diseases should I look out for when growing Rubrum Pennisetum?

A: Rubrum Pennisetum is relatively pest and disease-free. However, it can be susceptible to root rot if overwatered, so make sure to plant it in well-draining soil.


Rubrum Pennisetum is a beautiful ornamental grass that can add color and texture to any garden. Not only is it easy to grow and maintain, but it's also versatile enough to be used in a variety of landscape designs. Whether you're looking to create a natural border, fill a large open space, or add some interest to your container garden, Rubrum Pennisetum is definitely worth considering.