Unable to make SEO for categories in e-commerce page (inventory)

Ive been editing my SEO for my new website lately. My inventory commerce page houses categories of all my inventory and within those categories are sub categories- so it goes: Website > inventory > Categories All, Grow Kits, Liquid Culture, Cultivation Supplies, Raw material. One of the main categories named "Grow Kits" and "Liquid Culture" are predominantly the main pages that attract the bulk of my customers. i want to edit the SEO for that category page (not the specific items) I can edit the SEO for the Inventory Page but not the Grow Kits, and Liquid Culture category pages. What could I do to create an SEO for those pages?