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Beth's Blue® Star Flower Isotoma axillaris

  • Sun
Flower Season
  • Spring
  • Summer
Mature Size
14" 14" 36cm 36cm
Height: 12" - 14"
Spread: 10" - 14"
Height: 30cm - 36cm
Spread: 25cm - 36cm
Award Winner
  • Details

    12 - 14 Inches
    8 - 12 Inches
    10 - 14 Inches
    30cm - 36cm
    20cm - 30cm
    25cm - 36cm


    Star-shaped flowers on a cushion of medium-green foliage

    Award Winner
    Heat Tolerant
    Deadheading Not Necessary


    Plant Type: 
    Height Category: 
    Garden Height: 
    12 - 14 Inches 30cm - 36cm
    8 - 12 Inches 20cm - 30cm
    10 - 14 Inches 25cm - 36cm
    Flower Colors: 
    Flower Shade: 
    Foliage Colors: 
    Foliage Shade: 
    Container Role: 

    Plant Needs

    Light Requirement: 

    The optimum amount of sun or shade each plant needs to thrive: Full Sun (6+ hours), Part Sun (4-6 hours), Full Shade (up to 4 hours).

    Maintenance Category: 
    Bloom Time: 
    Planting To Frost
    Hardiness Zones: 
    7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b, 11a, 11b
    Water Category: 
    Soil Fertility Requirement: 
    Average Soil
    Edging Plant
    Mass Planting
    Uses Notes: 

    Use in pots, window boxes, landscaping and combinations

    Maintenance Notes: 

    Easy to maintain.

    Beloved for its unique star-shaped, lavender flowers and interesting texture, this plant plays well with others in combination containers and landscapes. Once it gets started, it blooms right on through the heat of summer until frost.

  • 30 Reviews

    Browse reviews from people who have grown this plant.
    • This spring I received an isotoma plant as a gift and didn't know what to expect. I planted it in the ground in a sunny spot. It grew about a foot tall and wide. It produced lots of little star-like blooms until late August. After that it had no more flowers but the foliage still looked okay. It was a very pretty little plant for most of the summer.

      Karen Muse
      , Michigan
      , United States
      , 1 year ago
    • Great performer! Tidy growth habit in a pot by itself and withstood our over 110 degrees, 3-day heatwave with watering twice a day. Continuous bloom and always looks happy.

      , Oregon
      , United States
      , 2 years ago
    • I bought several of these this year at the nursery where I work, as they were absolutely charming. After a month, one started dying and gradually they all died, although the last one made it to the end of July. We had a fabulous mild extended spring for South Carolina, but that didn't seem to help the first one. As it started getting hot in June, they just looked worse and worse. I have sandy soil amended with compost and we had decent rainfall and I watered during dry spells, so am not sure what is going on. I will give them one more try next year, but I hope to ask some of our customers how theirs did. The pink ones did the same thing. I would love to know what went wrong.

      Peggy Gillingham
      , South Carolina
      , United States
      , 3 years ago
    • First got one of these in 2009 under the Proven Selections category. Every year since then have gotten 2 including this year, its inaugural year under the Proven Winners badge. I see no difference but that's a good thing because these plants are unique, robust and very close to a true blue. These do require a tad bit more maintenance than say, lantana or verbena but just some water, regular fertilzer and a little relief from unusually hot summer sun and this chap will bloom prolifically and continuously all summer. One of my top 3 or 4 PW plants and would recommend if only for the unique shape and rich blue color.

      Matthew Lamb
      , Maryland
      , United States
      , 8 years ago
    • Deer do not eat them

      Cloyd Peters
      , Ohio
      , United States
      , 9 years ago
    • Kelly S
      , Pennsylvania
      , United States
      , 10 years ago
    • Love this flower! It's beautiful in my container plantings! Very easy to grow and maintenance free!

      Tina Gilbert
      , Missouri
      , United States
      , 10 years ago
    • I plant this in the center of a 24 inch round pot - right in the center. I have 3 on my patio. Then I plant white begonias (4) around the Blue Star. It is an outstanding display for my patio! Not vivid enough for viewing from afar - but perfect for enjoying while on the patio. My entire garden is filled with Proven Winner plants - love them!

      Sharon Pennell
      , Ohio
      , United States
      , 11 years ago
    • Very hardy in containers. Growing combo pot with wave petunias and gazanias. Beautiful.

      , Indiana
      , United States
      , 12 years ago
    • Elsie Mcelheran
      , New York
      , United States
      , 13 years ago
  • 20 Awards

    Award Year Award Plant Trial
    2009 Visitor Favorites Dallas Arboretum
    2009 Excellent Rating Boerner Botanical Garden
    2009 Visitor Favorites Dallas Arboretum
    2009 Best of Newer Varieties Dallas Arboretum
    2009 Best Performer Dallas Arboretum
    2009 Excellent Rating Boerner Botanical Garden
    2009 Best of Newer Varieties Dallas Arboretum
    2009 Best Performer Dallas Arboretum
    2009 Visitor Favorites Dallas Arboretum
    2009 Best of Newer Varieties Dallas Arboretum
  • 2 Recipes

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