Aglaeca wrote:That's only 10 per * 10 exp so not too hard to gain.
Actually that's about 32 * 32 ( = 1024 ... closest square number without going under)

They're visible a bit less than this, but your chance of seeing them are very low. You should be able to have some chance to see them if you get a quest to find them. As far as I know, the values on the wiki from legacy are still correct for the herbs listed.
Aglaeca wrote:he problem is more that they are both rare and easy to see so likely other people are grabbing them.
They're not rare. Once you can start seeing all of them, you usually will find one per med sized clay area, and a couple in a large one. If all you have are smaller clay areas, you might have to get lucky to find one. You just have to contend with RNG and might go several days without spotting one.
Do note, if you don't know already, that items are spawned when an area is loaded into the server, and items are wiped when an area is unloaded from the server. It takes an area being empty for about 15-20 minutes before it is unloaded. Unless you live in a heavily populated and active area, you should be able to come back after 20-30 minutes and have an area of fresh spawns (extra time for the random chance that someone else wandered into the area and reset the timer).
Opinions expressed in this statement are the authors alone and in no way reflect on the game development values of the actual developers.