Hi Bronwen, You don't need the Dawn with your vinegar. Just go straight vinegar --the higher acidic percentage the better. It's slower than Round-Up, but less bad for the beneficial insects and the environment. -- *Michelle Zupan* Curator Hickory Hill & the Tom Watson Birthplace 502 Hickory Hill Drive Thomson, GA 30824 706-595-7777 FAX: 706-595-7177 Visit us at www.hickory-hill.org or on Facebook <https://www.facebook.com/hickoryhillmuseum>. Follow us on Twitter: HHEducation Historic homes of the Watson-Brown Foundation, Inc <http://www.watson-brown.org>. ========================================================= Important Subscriber Information: The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes). If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).