The upgrade costs 25xRegional Wealthand 2x Planks (which can be made at a Sawmill).
The upgrade will take a short amount of time to complete after the materials are delivered to the site.
However, it’s important to recognise that Herbs are a cure, not a prevention.
They’re found in the Materials section of the Trade tab when you pick the Trading Post.
That concludes this quick guide on how to gather Herbs from your Herb Gardens in Manor Lords.
