TriTunia™ Blue Star Petunia

TriTunia™ Blue Star is an annual grandiflora petunia with blue flowers and a mounding habit. Syngenta lists the exact selection at 10–12 inches tall and 12–14 inches wide, with flowering from mid-spring through summer. It grows in full sun or partial shade and belongs to the TriTunia series, selected for early, uniform flowering. ([Syngenta Flowers](https://www.syngentaflowers.com/ams/product/flower/70065668)) ## Placement Use TriTunia Blue Star in packs or containers and repeat it along a seasonal bed for a consistent blue display. The series page lists part shade, part sun and full sun exposure. ([Syngenta Flowers](https://www.syngentaflowers.com/ams/product/flower/70065668)) ## Establishment Acclimate young bedding plants outdoors before planting. Iowa State recommends hardening bedding plants for 7–10 days and notes that petunias can be pinched back to encourage branching. ([Iowa State University Extension](https://yardandgarden.extension.iastate.edu/how-to/selecting-hardening-and-planting-bedding-plants)) ## Maintenance During establishment, thoroughly water seedlings when the soil surface becomes dry. Remove flowers on blooming annuals during establishment to help plants settle in, as Iowa State advises.