How do I modify the font of the vendor name in a featured collection?

[plants4friendz]

Can anyone tell me how to change the font of the vendor name in a featured collection?  

I want to change where it says "Plant Ally for.." (which I put in the vendor space in product). I successfully did it in the featured product section below where it says "Channeled Moon-thly Essence". 

Here's the page in case that's helpful: www.thespiralpath.love