Where are you guys buying bomb diagrams?

[AngelOfPassion]

Where are you guys buying bomb diagrams?

I need the formula/diagram to make the moon dust bomb but no where I go sells diagrams for bombs... I've tried the peller outside of Blackbough and any herbalist I come across but no one sells them... anyone remember where they may have bought some?

 

[d0ge]

Herbalist outside oxenfurt, slightly northeast I believe

 

[HexerDa]

Does anyone know how to upgrade oils and bombs?

 

[ulti937]

Does anyone know how to upgrade oils and bombs?

Find/buy the enhanced diagrams, similar to the witcher sets and potions.