Guild Wars 2

Is there any respawn system for gathering resources?
Im gathering herbs at mount maelstrom and im waiting for herbs to respawn..
Guess what..im there for an hour..im not farming orichalcums im trying to farm HERBS.
Should i leave the area and re-enter?I dont know really..
If someone knows id like to know too

Just from my experience:
Average resources (through tier 5) are on a 1 hour time.
Grade 6 (lvl 400) resources I believe, are on a 6 hour time.
Higher still, such as Rich orichal, and rich mithril, are on a 24hour timer.

I was gathering herbs around the mount maelstrom and i was waiting for them to respawn,after an hour the herbs didn respawn..I choose to teleport at the mists and i went back..no herbs around.then i choose to go to the mist and then to Lions Arch..
After that i choose to go back to mount maelstrom and all gathering resources are BACK.
It seems that u have to leave the area and then to re-enter..
Try and confirm this one

(Im talking only about the harvest one, herbs etc)