Using Facilities

You can purchase alchemy materials or equipment at shops.

Selling your items at Romy's shop will improve the quality and traits of items sold at other shops.
When you sell certain items, it can lead to new items being added to the line-up, as well as increased stock counts for certain categories of items.

You can grow materials at Cassandra's farm.
You can plant seeds synthesized with alchemy. You'll have to wait a little while before harvesting your crops.
Depending on the quality and traits of the seeds, the type, quality, and traits of the crops will also change.

You can reinforce your equipment at Dennis's workshop.
Stats will increase according to the materials you use, and you can even carry over material traits.
You might even be able to unlock special equipment effects if you use the right materials.
You can only reinforce each piece of equipment a single time.