How to produce Ancient Fruits?

Solution 1:

There are a few ways to get ancient seeds:

• Donate the Ancient Seed artifact to Gunther at the museum and he will give you a plantable packet as a reward. He'll also give you a crafting recipe to turn any other Ancient Seeds into the plantable version.
• The travelling cart occasionally sells them for 400-700g
• Putting Ancient Fruits into the seed maker will give you seeds (though you need an ancient fruit seed to start your ancient fruit plantation)
• Other plants have a very low chance to give an ancient seed when put in the seed maker

The Ancient Fruit plant is unique in that in grows in all three growing seasons- spring, summer, and fall. It takes a whole month to grow and produces fruit every 7 days, so it is best to plant it at the start of spring or in a greenhouse.

Solution 2:

Ancient fruits grow from ancient seeds, which can be crafted from ancient seeds. Confused yet?

One of the artifacts that can be found in the mine is the ancient seed, which looks like a small bead. Donating one to the museum unlocks a crafting recipe to turn the artifact ancient seed into a plantable packet of ancient seeds.

Ancient plants take 28 days to mature, and regrow every 8 days. They grow in spring, summer and winter.