Which buildings have lots of ingredients?

Solution 1:

Finding ingredients in Skyrim is easy. Just go adventure and be perceptive. Ingredients can be found almost everywhere. I usually had to stash all my ingredients in a container next to an alchemy lab whenever I visited a place I owned because they weighted so much.

Below is a description where you will find the paralyze ingredients:

• The Swamp fungal pods and Canis root ingredients grow in the Hjaalmarch. You can pick up a lot of ingredients by circling the region every once in a while. Imp stools are found throughout the caves in skyrim. There is a large amount of imp stools in Chillwind Depths, a cave to the south of Dragon Bridge near Hjaalmarch.

• Human flesh and briar hearts are rare ingredients. Necromancers use the flesh and briar hearts can sometimes be found in alchemy rooms throughout skyrim. You can also kill Forsworn briar-hearts but they are uncommon and tough.

• Gleamblossom can only be found in the Darkfall passage and Forgotten Vale but it's a long trek through an army of falmers.

• Finally to acquire netch jelly, you need to fight the netch creatures which can be found along the western and southern coast on Solstheim.

Solution 2:

Just to add to Steinin's great answer:

If you have the hearthfire DLC, you can also plant imp stool and swamp fungal pod in a greenhouse or the garden. This makes collecting them MUCH easier. It also respawns quite fast (I think they respawn every 3 days).

Finally, if you don't mind mods that assist in this area, I suggest the Harvest Overhaul mod. It makes more sense to have the chance to collect 2 eyes from a sabertooth and 5-10 flowers from a clump of them than a single ingredient.

Also, keep in mind, to make your alchemy go up the fastest, you'll want to make the most expensive potion so this question may be of some help.