I spent some time on thottbot and sometime asking around and gathered a slight herbalism guide about the levels to pick them and the best spots ive found sorry for no pictures but this should help at least some
(0)Silverleaf-Dun Morogh.
(0)Peacebloom-Dun Morogh.
(15)Earthroot-Dun Morogh->Hug the mountains youll see them growing on hills.
(50)Mageroyal-Border of West Fall and all around the out side of Twilight Grove.
(70+/-)Briarthorn-Outside of Twilight Grove in Duskwood (counter clockwise from 6 o'clock SOUTH)
(70)Swiftthistle-50% drop off of Briarthorn and Mageroyal.
(80)Stranglekelp-Start at the northern end of Westfalls Coast,Jump into the water and swim south!
they are at the bottom of the ocean you should average about 30 kelp per run.
(100)Bruiseweed-Can be found growing up trees and in bushes of Westfall and Lakeshire.
(115)Wild Steelbloom-The mountain range in Duskwood again and the
mountains of South Shore.
(125)Kings Blood-Fields of Duskwood and South Shore.
(150)Liferoot-The stream cutting down the right side or Hills Brad,
follow it from bottom to top (til western plaguelands).
(170)Gold Thorn-Arathi Highlands (near hills and bushes) and scatterd thru Strangle Thorn.
(185)Khadgers Whisker-StrangleThorn Vale on trees and around bushes.
(195)Wintersbite-North of Southshore in the ogres village.
(205)Firebloom-Burning Steppes,Tanaris scattered.
(210)Purplelotus-Hinterlands in the troll shrines and camps .
(210)Wildvine-Random off of purple lotus.
(210)Arthas Tears-Western Plaugelands look for battle areas or war zones and youll find them.
(220)Sungrass-Hinterlands>EVERYWHERE< and a good money maker too!
(235)Blindweed-Swamp of Sorrows at the banks or the little islands.
(245)Ghost Mushroom-Maraudon and Skulk rock in hinterlands.
(260)Golden Sansam-I seemed to have most of my pickups in Ungoro Crater.
(260)Dreamfoil-Felwood scattered around and in Winterspring.
(280)Mountain Silversage-Wintersping and Eastern Plaguelands.
(285)Plaguebloom-Eastern Plaguelands dont step on it! Its all around you!.
(290)Ice Cap-Winterspring FARM THESE used in icey enchant good $$.
(300)Black Lotus-4 World Spawns Winterspring,Eastern Plaguelands,Burning Steppes,Silithus.
sorry if it hurts your eyes have to run to school VOTE FOR MMOWNED!