Sorry...I just now saw this since it got bumped up. I got nettles from www.fromnaturewithlove.com But its a pretty common herb (I think) so you should be able to find it other places that have a selection of herbs. To infuse, you can add the dry herb to oil in a jar and let it sit in the sun for a few weeks. Or, you can do it double boiler method. So I can get it quick, I use the doubler boiler method - I put the jar in a pot of water and simmer for a long time. However, when summer comes around, I plan on just leaving the jars in the sun (too cold now). When its done, just strain