Biennial Plants

Unique Features & Life Cycle of Biennial Plants 

Biennial translates as “two-year” from Latin, and that pretty much explains what this category of plants is. It includes all flowering species that complete their life cycle in two seasons. During the first one, they build themselves up. During the second, they reproduce before they’re gone. 

Biennials occupy a middle position between annuals and perennials in terms of priorities. Annuals focus heavily on reproduction during their only season. Perennials invest in roots and long-term survival strategies. Biennials build roots, stems, and leaves during the first season and then shift their main focus to flowers, fruit, and seeds. 

The popular biennial plants list isn’t as long as that of annuals or perennials. Biennials are less common overall. Still, the category includes some popular species, such as Great mullein, Foxglove, and Hollyhock. 

Planning Considerations & Suitable Garden Styles 

Biennials have many benefits, including early spring flowering, self-seeding for certain species (e.g., Forget-me-nots, Sweet Williams, Honesty flowers), and overall hardiness. However, they also require yearly sowing between mid-June and mid-July — that’s how you establish the rotation between the first-year rosettes and full-scale flowering and avoid the “empty season”. 

These plants are great border fillers. They also fit different gardens: cottage, meadow, shaded, gravel, and dry ones.  You just need to choose the compatible species that will thrive in your environment. You can see biennial plants’ names and pictures above — click on any of them, learn full information about their environmental needs and care requirements, and pick the best option.