There are many advantages to planting perennials in your garden or landscape. The first and most significant advantage over annual plant varieties is that perennials will come back year after year without needing to be replanted, while annuals will die off after their growing season is finished.
Many perennials will look right at home in either a wildflower garden or a more formal garden or landscape, and will often require far less maintenance than an annual plant. Less time spent feeding, watering, and tending perennials means more time for enjoying their beauty.
Perennials, in general, are not very fussy, and that can be another significant advantage to planting them. Whether you plant in the fall or spring doesn't matter, as most perennials won't produce many blooms in their first year anyway. After a year of tending and caring for them with routine weeding and watering, they will fully bloom and flourish the following year.
While an annual might initially produce more blooms than the average perennial, it is because annuals grow from seeds and spend all of their energy on creating blossoms and greenery. Perennials primarily focus on building a secure root network in the first year, and then continue growing in future years, often resulting in fewer overall blooms but a plant that will last for many years before needing to be replaced. There are also varieties of perennials that have a longer blooming season, similar to an annual.
Lastly, a significant advantage that perennials have over annuals is that they are more easily able to handle climate change and stress. Their extensive root networks allow perennials to more easily bounce back from more extreme weather conditions, including significant temperature swings and even drought or flooding.
When it comes to planting a low maintenance garden that will come back reliably each year, perennials have all the advantages.