How do you get rid of it?
* Pulling or digging out the plants while small is best. Small ones are easily pulled by hand when the soil is moist. Winter and spring are good seasons. A pulaski and shovel are useful when a plant is too large to pull safely by hand.
* The mature plants are very difficult to remove by hand. It is possible to undercut and remove one using a combination of pulaski and shovel, but it takes a long time. The easiest way is to place a choker cable around the plant's base and pull it out with a winch. If the choker slips off the plant, dig around the base for a better grip and try again. The soil must be moist. Winter and spring are good seasons. After removal, turn the plant upside down so that the roots no longer touch the ground. Re-check every few months for contact. Unless able to take root again, the plant will die.
* Cutting the plumes off and placing them in bags helps to prevent further seed dispersal. The plumes cannot be cut and left on bare ground. The seeds will sprout.
* Providing an environment conducive to rapid growth of native trees soon produces shade adequate to exclude Pampas grass. The quality of environment for growth of natives is improved by reducing Pampas grass' competition.
Source: http://www.nps.gov/redw/pampas.htm
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