In the year of 2016, there was
Growfruit Challenge at the spring. This challenge first introduced Jasmine Holiday sim.
Here's the official blog about this challenge. (https://www.ea.com/games/the-sims/the-sims-4/news/spring-challenge)Anyway, during that challenge, Jasmine Holiday was seen tending gardens in the community gardens. Your sim can go talk to her and start this challenge. Jasmine would then give your sim a growfruit and your sim can also ask for a fertilizer. Growfruit could be also found around the town (recognized by trees that has a green glow) and at the ranger station (where it can still be found). The goal was to plant the growfruit, evolve the plant to the better quality and deliver 20 good quality growfruits to Jasmine. The reward is green planting pot that is seen in the build mode locked. Jasmine will then ask your sim to bring them 20 excellent quality growfruit. Once you do that, you'll get and unlock the golden planting pot with jewels.
Also during that challenge, sims could collect easter eggs from around the town. From trashcans to places where you find collectables. This spring added 2 rare easter eggs that had a yellow glow. When you collect them all, the reward is same: You unlock bunny stuffed toy.