Overwintering rosemary hints...?
I recently purchased a 7" tall rosemary plant, labeled "tender perennial-hardy zone 7". The latin name given on the tag is Rosmarinus officinalis. This was bought as an experiment, so it is slightly expendable (i.e., you won't find me in trama therapy if it dies this winter), but I would be grateful for any tips any one has on wintering this over outside, against a south wall, in zone 6b, exeter, rhode island. I was thinking about mulching it, then covering the mulch pile with some heavy duty outdoor type plastic, and then mulching over that again; the second layer could be straw. Any ideas? My girlfriend and I are very new to herb gardening, and need all the help we can get. Thanks for reading. :)