Repotting Plumeria during winter, which is their dormant period, generally does not disturb their spring bloom cycle. Here’s why:

1. Dormancy Advantage: Plumeria typically enters a dormant state during winter, especially in cooler climates. This period of minimal growth activity makes it a safer time for repotting. The plant’s energy is conserved, and it’s not actively developing blooms or new foliage.
2. Less Stress on the Plant: Since the plant is not actively growing, repotting during this time is less stressful for it. This reduced stress means the plant can recover from the repotting process without impacting its blooming cycle.
3. Timing for Repotting: Ideally, repotting should be done towards the end of winter or early spring, just before the plant exits dormancy and begins its active growth phase. This timing allows the Plumeria to acclimate to its new pot and prepare for the growing season, including blooming.
4. Post-Repotting Care: After repotting, provide appropriate care – avoiding overwatering and placing the plant in a suitable location. As the weather warms up and the plant exits dormancy, it will start focusing on new growth and blooming.
5. Potential Delay in Blooming: While repotting during dormancy is generally safe, it’s important to note that any significant change like repotting can potentially cause a slight delay in the onset of blooming, especially if the plant takes time to adjust to its new environment.

Conclusion

Repotting Plumeria in winter is unlikely to significantly disrupt its spring blooming cycle, making it a favorable time to repot. This is due to the plant’s dormant state, which minimizes stress. However, gentle handling during repotting and appropriate post-repotting care are crucial to ensure the plant remains healthy and ready to bloom in the spring.