Growing Pampas Grass: Tips at a Glance. It may not, however, be winter hardy in your zone. This is because it allows you time to prepare it into hardy seedlings. With that in mind, you’ll find that early spring is the best time to plant pampas grass seeds in a garden. Before growing pampas grass, be sure to put it somewhere in the landscape where it has plenty of room to grow, especially when planting more than one. Page 1 of 1: Does a nyone know when is the right time to collect pampas grass seed. Keep the plants indoors during the first winter to protect young plants from frost if seeds are planted later than spring. But pampas grass is incredibly prolific when it comes to seed production; a single plant can bear up to a million seeds over its lifetime. In your climate, Pampas Grass should reach at least 7-8 feet, after growing for 3-4 years. Stir the soil well the even out the dampness. These grasses can get over ten feet (3 m.) tall, which means you need plenty of room for these monstrous, yet amazing plants. Plant the seeds indoors four to six weeks before the last killing frost in spring. As the temperature rises, the grass begins to flourish, producing those tall, 10 – 13ft plumes within a few months so that you can enjoy the full effect of your ornamental grass by the summer. Don’t soak it too much, just enough to dampen. Pampas grass enjoys areas with full sun but will tolerate USDA zones warmer than zone 7 rarely get freezing temperatures in the spring that will damage the plants. Fill the planting cells with the seed growing soil to just below the top. How to Grow Pampas Grass. Type Ornamental grass Lifespan Perennial That is an intriguing question and one that deserves some measured consideration. Keep the Pampas Grass seeds moist until germination occurs. Detailed steps to grow ornamental grass from seed indoors. Pour some of the seed growing soil into a bowl or container. My pampas grass has wonderful plumes and I want to collect seed for next year. And although pampas grass dies back in the winter, it rebounds once warm weather returns. Planting pampas grass from seeds can begin during the late winter months. Perennial pampas grass is majestic and showy, with 13-foot-high white plumes which create as much visual interest as a specimen tree. When mass planting pampas grass, you’ll have to space them about 6 to 8 feet apart. Dampen the soil by holding the container under the faucet. The huge, elegant pampas grass makes a statement in the garden, but can you grow pampas grass in pots? I've never heard of any ornamental grass, including Cortaderia (Pampas Grass), reaching 20 feet in height. Pampas grass seeds require loose, well-drained, moist soil for germination. Growing Pampas Grass (Cortaderia Selloana) As expected with most plants, you can either transplant the seedlings from a nursery or use seeds. In the case of pampas grass, transplanting is the better option. The self-sowing seeds can sprout in almost any kind of soil, too. Using a seed starting tray filled with a pre-moistened seed starting medium that drains well, place the ornamental grass seeds on top of the soil and gently press the seeds in. Plant the pampas grass transplants in a new location immediately and at the same depth they were previously growing. But be careful in regions where it is invasive: make sure a species is sterile before you let it loose in the garden. Page 1 of 1: Does a nyone know when is the right time to collect pampas grass seed. Pour an even mixture of moistened peat moss and light sand into a 4-inch diameter planting container.