Twilight tries to figure out how rock farming works.

When Twilight is taken by the Nightmare, it's up to Pinkie Pie to rescue her.

Fluttershy must deal with an unusually thick fog as it approaches Ponyville.

Rainbow Dash wants to add strength training to her regimen by having Twilight Sparkle ride her.

Penumbra seeks gainful employment.

Trixie returns to Ponyville to challenge Twilight Sparkle. ("Magic Duel" as it occurs in the Petriculture AU.)

Celestia decides to attempt to reform Discord, so she taps a pony with a similar background for the job. ("Keep Calm and Flutter On" as it occurs in the Petriculture AU.)

Spike somehow ends up on a blind date with the chimera from the fire geyser swamp -- or to be more specific, with its tail.

A new predator arrives in the fire geyser swamp, challenging the dominance of the chimera.

A dozen years after ascending to become an alicorn, Applejack rules on the case of Tiara v. FlimFlam

Pinkie Pie heads to another world to retrieve the stolen Element of Magic, with Penumbra in tow. ("Equestria Girls" as it occurs in the Petriculture AU.)

Before Applejack's pep rally, Derpy was acting really weird... even for her. This is why.

After Tirek destroys Ponyville's library, the chimera from the fire swamp decides to exact the vengeance that the ponies refuse to take.

Ember learns why it's never a good idea to make a lovestruck chimera tail angry.

After Pinkie Pie thwarts her efforts to create an army of humans for her invasion, Sunset Shimmer plots her next move while she serves time in an Equestrian prison. (A Petriculture Story.)