Fairies

Fairies is an Event Weather from the Fairy Event in which fairies visit players' gardens and apply the Glimmering mutation to a random crop. That single targeted mutation is the entire payoff: Glimmering adds a sell multiplier on top of whatever growth and mutation stacks a crop already carries, so a fruit that lands it can leap in value.

The catch is the randomness. The fairies pick one crop with no input from you, so the way to bias the outcome is to maximise how many high-value, fully grown plants are sitting on your plot when the weather hits. A garden packed with ripe, expensive fruit gives the random roll a far better chance of striking something worth harvesting, whereas a plot of cheap sprouts mostly wastes the visit.

This event also ties into the Pixie, a limited rare pet pulled from the Enchanted Egg at a 29% chance. For profit, stack your most valuable crops before Fairies arrives, let the Glimmering land, then sell the affected fruit promptly to lock in the bonus. Pair it with other active mutations for compounding multipliers rather than harvesting in isolation.