Blue Daze

Blue Daze (Evolvulus glomeratus)

Brazilian Dwarf Morning Glory

Full sun; medium to dry moisture, well-drained to sandy soil; poor drainage is the primary failure mode; pH 6.0–7.5.

6–12 inches tall, 12–24 inches wide, trailing-mounding; blooms continuously from late spring through frost with small sky-blue flowers opening each morning and closing by afternoon; does not set viable seed — propagated by cuttings only.

Propagation: tip cuttings root readily; treated as a frost-tender annual in Zone 6b/7a — plants are killed by first frost.

Native region: Not native to Tennessee; ornamental introduction from Brazil and tropical South America.

In Middle Tennessee, E. glomeratus is one of the few reliable true-blue annual groundcover options for sunny, well-drained sites. The critical failure point is drainage — even a single day of saturated soil can cause stem rot at the crown, a common problem in Middle Tennessee's clay-heavy residential lots after heavy summer rains. Raised beds, rock gardens, or container plantings on patios consistently outperform in-ground planting in heavy soil. Flowers open each morning and close in afternoon heat or overcast conditions — this is normal behavior, not a stress response. Drought-tolerant once established; overwatering in clay is more damaging than underwatering. No significant insect pest issues in Tennessee.