How Long Does Pampas Grass Take To Grow

Pampas grass typically takes 2 to 3 years to reach full maturity and height, making it a popular choice for landscaping projects that require tall, ornamental grass with a fluffy plume-like appearance.

What is the best time to plant pampas grass?

The best time to plant pampas grass is in late spring or early summer when the soil has warmed up and there is plenty of sunlight. Avoid planting during the winter months or when the ground is frozen.

How long will pampas grass last?

Pampas grass can last for many years, with some varieties living for up to 20 years. However, the lifespan can vary depending on the growing conditions and how well the plant is cared for.

Where does pampas grass grow best?

Pampas grass grows best in areas with full sun exposure and well-draining soil. It is native to South America but can also thrive in other regions with similar growing conditions.

What is the tallest pampas grass?

The tallest pampas grass is the Cortaderia selloana ‘Andes Silver’ variety, which can grow up to 13 feet (4 meters) tall. It is a particularly striking variety with silvery-white plumes.

Pampas grass is a popular ornamental grass that is known for its large size and stunning appearance. It is commonly used in landscaping and garden design, and many people are curious about how fast it grows.

Pampas grass can grow very quickly under the right conditions, with some varieties growing up to 10 feet in a single year. However, the growth rate of pampas grass can vary depending on some factors, including the climate, soil quality, and amount of sunlight it receives.

Pampas grass will grow fastest during the spring and summer months when temperatures are warm and there is plenty of sunlight. During this time, it can grow as much as 2-3 inches per week. However, growth rates may slow down during the fall and winter months when temperatures are cooler and daylight hours are shorter.

To ensure that your pampas grass grows quickly and healthily, it’s important to provide it with the proper care and maintenance. This includes regular watering, fertilization, and pruning as needed. Pampas grass should be planted in a location that receives plenty of sunlight and has well-draining soil.

If you’re looking to add pampas grass to your landscaping or garden design, it’s important to choose a variety that is well-suited to your climate and growing conditions. Some varieties may grow more quickly than others.

Does Pampas Grass Spread

Pampas Grass and its spreading.

  • Pampas grass (Cortaderia selloana) is a large, ornamental grass native to South America.
  • It can grow up to 10 feet tall and 6 feet wide, with large plumes of white or pink flowers.
  • Pampas grass spreads primarily through seed dispersal, as the seeds are carried by wind and can travel long distances.
  • It can also spread through rhizomes (underground stems), which can produce new shoots and form clumps.
  • Pampas grass is considered an invasive species in some regions, as it can outcompete native plants and alter the landscape.
  • To control its spread, it’s recommended to remove the plumes before they release seeds, and to dig up any new shoots that appear.
  • Pampas grass can thrive in a variety of conditions, including full sun, partial shade, and a range of soil types.
  • It’s often used in landscaping for its dramatic height and texture, but it’s important to consider its potential impact on the environment before planting.

How To Grow Pampas Grass Seed

Pampas grass (Cortaderia selloana) is a popular ornamental grass known for its tall, feathery plumes and hardy nature. Growing pampas grass from seed can be a rewarding and cost-effective way to add this beautiful plant to your garden or landscaping. Here are the steps to follow to grow pampas grass from seed:

  • Choose a planting location: Pampas grass requires full sun and well-draining soil. It can tolerate a range of soil types, but prefers sandy or loamy soil. Choose a location that gets at least six hours of direct sunlight per day.
  • Prepare the soil: Before planting, clean the soil by removing any weeds or debris and loosening the top soil. If the soil is heavy or clay-like, mix in some sand or compost to improve drainage.
  • Sow the seeds: Pampas grass seeds are very small, so it’s best to sow them indoors in a seed-starting tray or pots. Fill the tray or pots with seed-starting mix and moisten the soil. Sprinkle the seeds evenly over the surface of the soil, then lightly press them into the soil with your finger. Cover the tray or pots with plastic wrap or a clear lid to create a humid environment for the seeds.
  • Provide proper care: Keep the soil moist but not waterlogged, and place the tray or pots in a warm, bright location. Pampas grass seeds germinate best at temperatures between 65 and 75 degrees Fahrenheit. Once the seeds have germinated and sprouted, remove the plastic wrap or lid and provide plenty of light. When the seedlings have grown large enough to handle, transplant them into larger pots or directly into the garden.
  • Maintain the plants: Pampas grass is a low-maintenance plant that requires little care once established. Water the plants deeply once a week during the growing season, and prune them back in late winter or early spring before new growth appears.


Pampas grass can take several years to reach its full height of up to 10 feet, depending on the growing conditions and climate. On average, it can grow around 2-3 feet per year, making it a relatively fast-growing plant. 

However, it’s important to note that Pampas grass can also be invasive and spread easily, so proper care and maintenance are necessary to prevent it from overtaking other plants in the area. To grow Pampas grass from seed. 

It’s recommended to plant them in well-draining soil and keep them consistently moist until they germinate. With the right conditions and care, Pampas grass can be a beautiful addition to any garden or landscape.

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