I made this Widowbloom farming guide to help out players who want to farm the herbs instead of buying them from the Auction House.
There are no herb ranks in Shadowlands, so the only thing that will affect how many herbs you gather is your herbalism skill. You can farm Widowbloom with Shadowlands Herbalism skill 1, but you will get more herbs with higher herbalism skill.
Farming Tips
Below you will find a few tips that will help you gather herbs faster.
Unfortunately, there are no new Stirrups or Leather Barding recipes in Shadowlands, so gathering herbs will be a lot harder for most classes.
How to avoid getting dismounted
One of the most annoying things in WoW is getting 
Dazed. Every mob has a chance to daze you when they are in hitting you from behind, but there are two ways to prevent getting dazed.
- If your class has a tanking spec, you can switch to that while farming. Tanks are immune to daze, so you will never get dismounted.
- Equipping a
Comfortable Rider's Barding in your mount equipment slot prevents you from being dazed while mounted. (doesn't work with druid forms)
Gather herbs while mounted
- Druids can gather herbs in travel form.
- The
Sky Golem mount lets you gather herbs while mounted. (this mount doesn't benefit from mount equipment)
Shadowlands Gathering Enchant
You can enchant your gloves with 
Enchant Gloves - Shadowlands Gathering to increase the speed of gathering in the new Shadowlands zones. (works with mining and skinning too) The enchant brings gathering time down from 1.5 seconds to 0.5 seconds. This is a must-have enchant if you gather while mounted because mobs can still interrupt your casting, and daze you, so you want to grab herbs as fast as possible.
Farming Widowbloom in Revendreth
Widowbloom is a zone-specific herb, it only grows in Revendreth. Below you will find the two farming routes that I use for farming this herb.
Route 1
I gathered the most Widowbloom by doing a loop in the lower part of Revendreth. There is a lift at the red line, so you have to wait for it to come up, or you can just jump down if you have any ability that you can use to survive the fall. Also, there are a few elite mobs before the lift, so if you are having trouble there, you can just go around that whole area skipping the lift and the elites. There is only one herb node up there, so you won't miss that much.
Route 2
This is also a good route, but I got a bit fewer herbs overall. The red line is filled with elites, you should only go there if you have a tanking spec AND also a way to gather herbs while mounted. But even then you might die, so I usually just recommend skipping that part. There are also elites in the lower part that area, but they are much easier to avoid.
The red X is the location of Stonehead. This NPC won't let you pass, if you approach him, he will pick you up and throw you. But, there is a crack in the wall to the north where you can pass.
You can also complete the 
Snacks for Stonehead quest, then you two will become best buds and he won't block you from passing anymore.
