Dayflower: The Morning Glory of the Ground Cover World
If you’ve ever noticed delicate blue flowers peeking out from garden beds or naturalized areas in the early morning, only to find them mysteriously closed by afternoon, you’ve likely encountered dayflower (Commelina). This charming little plant lives up to its name – each flower opens with the morning sun and closes by midday, creating a fleeting but beautiful display that has captivated gardeners and nature lovers alike.
What Is Dayflower?
Dayflower is a herbaceous forb that can grow as either an annual or perennial, depending on the species and growing conditions. As a forb, it lacks significant woody tissue and produces its distinctive three-petaled flowers throughout the growing season. The botanical name Commelina encompasses several species, each with its own unique characteristics but sharing that signature blue flower structure.
Where Does Dayflower Grow?
Dayflower has a remarkably wide distribution across North America, growing in states from Alabama to Wyoming, and extending into Canadian provinces like Ontario and Quebec. It’s also found in Hawaii, Puerto Rico, the U.S. Virgin Islands, and various Pacific territories. This extensive range speaks to the plant’s adaptability and resilience.
The native status of dayflower is somewhat complex – it’s considered non-native in Canada, Hawaii, and the Pacific Basin, while its status in the continental United States varies. Interestingly, it is native to the U.S. Virgin Islands. This mixed native status means gardeners should consider local alternatives when possible.
Should You Grow Dayflower?
Dayflower can be both a blessing and a challenge in the garden. Here’s what to consider:
Reasons you might want to grow it:
- Beautiful morning flower display with distinctive blue petals
- Attracts pollinators like bees and small beneficial insects
- Extremely adaptable and easy to grow
- Works well in naturalized or wild garden settings
- Requires minimal care once established
Reasons for caution:
- Can be an aggressive spreader in ideal conditions
- Mixed native status means it may not be the best choice for native plant gardens
- Flowers only last until midday, limiting visual impact
- May compete with more desirable native plants
Wildlife and Ecological Benefits
While dayflower does provide some wildlife value, it’s relatively limited. Large animals and terrestrial birds use it for only 2-5% of their diet and utilize it sparsely for cover. If you’re primarily gardening for wildlife, you might want to consider native alternatives that provide greater ecological benefits.
Growing Dayflower Successfully
If you decide to grow dayflower, you’ll find it refreshingly low-maintenance. The plant adapts to a wide range of growing conditions and hardiness zones, making it suitable for gardens across most of North America.
Ideal growing conditions:
- Moist, well-draining soil (though it tolerates various soil types)
- Partial shade to full sun exposure
- Regular watering, especially during dry spells
- Hardy across multiple USDA zones
Garden Design and Landscape Use
Dayflower works best in informal garden settings rather than formal landscapes. Consider using it in:
- Naturalized areas and wild gardens
- Ground cover for partially shaded areas
- Transitional zones between cultivated and natural spaces
- Areas where you want low-maintenance color
A Word About Native Alternatives
Given dayflower’s mixed native status, consider exploring native ground covers and low-growing perennials that are indigenous to your specific region. These alternatives will provide similar aesthetic appeal while offering greater ecological benefits to local wildlife and pollinators.
The Bottom Line
Dayflower is an adaptable, easy-care plant that can add morning charm to informal garden spaces. While it may not be the showiest performer or the most ecologically beneficial choice, it has its place in naturalized settings where its gentle beauty and pollinator appeal can be appreciated. Just be mindful of its spreading nature and consider local native alternatives for the greatest environmental benefit.
Whether you choose to welcome dayflower into your garden or explore native alternatives, the key is understanding what works best for your specific landscape goals and local ecosystem.
