Deepgrove roots herbalism

Use: Study to increase your Khaz Algar Herbalism Knowledge by 1.
“The roots continue to grow even after the rose is plucked. Not useful for any practical purposes, but rather intriguing to study.”

this item should drop from herbs before patch i was able to get more than 40 per day but right now last 2 days i spend almost 6h on gathering minning and herbs but this item dont drop for me any more when minning item null silver still drop no problem

I am still missing over 120 knowledge point in herbalism
I did weekly quest after that i got few points that are weekly 1 or 2 of this epic items that give 3 point and nothing since

You have to do the weekly quest before they drop.