Instead, you need to use a Renovation Kit or the +1 kit.

Without your own undertaking, this will never progress regardless if you advance to higher eras. In the beginning it will produce goods from the era you had when you receive the Terrace Farm. The 10 goods are always received from the eras assigned to the Terrace Farm.

An upgrade only results in a higher demand of population. You receive five Forge Points every 24 hours and this does not change with each era you progress into. Those of you who want Forge Points will not care about the era the terrace farms become available in. Terrace Farms are popular because of their goods production and the Forge points they provide. Terrace Farm = 2,975 – 4,760 medals a week. However you can receive a lot more medals through the Terrace Farm than if you had the same area filled with Victory Towers (as an example). Not many players use the Terrace Farm to produce coins, supplies or medals so this is something to be aware of for your own Farm. If you see a Terrace Farm in a town its clear to see that a player is either a good fighter or a good negotiator.

As previously mentioned, Terrace Farms are one of the potential rewards for completing the 148th fight in the Guild Expedition.

Forge of empires cider mill quest chain