Lobelia siphilitica

Lobelia siphilitica


Common name: Great Blue Lobelia


Late summer blues are a welcome addition and siphilitica delivers. Blooms appear atop stalks of two to three feet of clump forming plants. Flowers "pout" with lower petal lips sticking out farther than upper petals. Looks amazing when planted en masse.


Our perennials come nestled in a 4" square CowPot with a free metal plant ID marker. Learn more about why we think CowPots are so awesome here.


More Lobelia

  • Features & Care

    Attracts:     Pollinators, Butterflies, Birds, Hummingbirds

    Resists:      Deer, Rabbits
Zone:         4 - 9

    Height:      24" - 36"

    Width:       12" - 24"

    Light:         Full / Part Sun

    Blooms:     Late Summer to Fall

    Flowers:    Cut
    Water:       Average needs

    Soil:           Moist, well-drained, tolerates wet soil

    Native:       Native species

  • How to Plant

    CowPots are made from composted cow manure. As the pot decomposes, it feeds the roots of the plant helping it get off to a great start. We like to say the perennials think they're delicious and nutritious! :-)

    You will plant the pot along with the plant. No need to put holes in the pot or remove the bottom. It decomposes faster than all other non-plastic pot options and the roots easily push through.

    Place the plant in the hole so that the top of the soil in the pot matches the soil line in the garden. Ensure that soil is pressed against the pot on all sides and the bottom. Keep the area inside and outside the pot moist (but not soggy) for 3 to 4 weeks until the plant is established.

  • Shipping Information

    We ship to the 48 continental US states only.

    Spring shipping begins in April and continues until temperatures make shipping prohibitive (typically late June through August). Fall shipping begins in September through mid-October. Shipping may be held up due to cold or hot temperatures, or extreme wet conditions.

    Check to see that our email address doesn't get sent to your spam folder. Not just because we're a lot of fun to hear from, but so your shipping notification and tracking info comes through, too. :-)

  • Awards, Credits, Patents