Show Me Plants & Seeds That Grow In My Area
Edit Settings
"Guaranteed To Grow" Filter

Enter your zip code to see plants that will work in YOUR garden. No more guesswork!

Guaranteed To Grow Lookup Map

Enter your zip code to see plants that will work in YOUR garden. No more guesswork!

Hide Filter Zone Info

Filtering By:


Filter is:


Edit Settings

USDA Plant Hardiness Zones

To help gardeners understand which plants will grow well for them, the entire USA has been segmented into ‘Plant Hardiness Zones’. Knowing your zone number is helpful when shopping for plants because:

  • Cold-area gardeners can avoid buying plants that simply won’t survive their lowest winter temperatures.
  • Warm-area gardeners can steer clear of plants that need a period of cold weather in order to bloom again.
Find your Plant Hardiness Zone here.

Blue Cardinal Flower Seeds

per Packet
Most orders ship within 48 hours or less. Learn More…

This beauty is often called "Blue Cardinal Flower" since it is often planted with its famous red cousin. Easy. Perennial

Zones 3 - 8
Ideal Regions
Pacific Northwest
Light Requirements
Half Sun / Half Shade
Half Sun / Half Shade
Mature Plant Size 24-36 inches tall
Bloom Time Summer
Size Packet

Plant Information

This is the blue-flowered species in the famous wild lobelia family. This one is a grand 3 to 5' plant that quickly forms attractive colonies in light woodland or other shady spots. (Allow the flowers to drop their seeds in fall, and you'll have a big group of plants in no time.) Unlike its cousin, the more showy red Cardinal Flower, which holds its flower stalks above the leaves, Great Blue Lobelia opens sky blue midsummer flowers in the axils of each upper leaf, and then continues blooming for weeks and weeks. It also sends out side shoots, resulting in striking blue bloom on a candelabra-like plant.
Common Name Blue Cardinal Flower
Botanical Name Lobelia siphilitica
Seed Life Cycle Perennials
Light Requirements Half Sun / Half Shade
Flower Color Blue
Mature Height 24-36 inches tall
Bloom Time Summer
Ships As Seed
Seeds Per Pound 6400000
Seeds Per Packet 750
Soil Moisture Average, Moist/Wet
Soil Type Loamy Soil, Moist/Wet Soil
Native To North America
Native To Eastern and Central United States
Ideal Region Northeast, Southeast, Midwest, Southwest, West, Pacific Northwest
Zones 3, 4, 5, 6, 7, 8
Is It Storable? Yes- You can store your seed in any cool (not freezing) dry place that is not subject to extreme temperature variations.
Non-GMO Yes
Neonicotinoid-Free Yes - Learn More
Ships to Hawaii, Alaska & Canada Yes


Most orders ship within 48 hours or less.

As soon as your order is placed you will receive a confirmation email. You will receive a second email the day your order ships telling you how it has been sent. Orders for in-season products ship within 48 hours or less. Depending upon your order date, we may hold your shipment to combine it with other products on your order, if applicable. See our shipping information page for approximate ship dates and more detailed information. If you need express shipping or have any questions, please call Customer Service toll-free at (877) 309-7333 or contact us by email.

View Shipping Rate Chart

Reviewsby PowerReviews


by PowerReviews
American MeadowsBlue Cardinal Flower Seeds

(based on 3 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars




of respondents would recommend this to a friend.

Reviewed by 3 customers

Displaying reviews 1-3

Back to top


beautiful blue


from north Stonington,ct

About Me Avid Gardener


  • Attractive


    Best Uses

    • Garden

    Comments about American Meadows Blue Cardinal Flower Seeds:

    Nice Flowers

    • Primary use:
    • Personal

    2013 blue cardinal seeds are excellent!


    from Fishersville, VA

    Verified Reviewer


    • Good Germination 2013
    • Stands Upright In Bloom


      Best Uses

        Comments about American Meadows Blue Cardinal Flower Seeds:

        Blue cardinal flower is true to American Meadow's description. My first attempt with these seeds was lackluster, with little germination in peat pellets and a covered flat, though I did get some plants. A subsequent trial with a new packet of seeds in 2013 germinated fine to yield many seedlings. Seedlings were easily separated from peat pellets to 2.5-inch grower pots and I will soon transplant them into soil after they have spent some time developing roots in pots. I planted the few seedlings obtained from an earlier seed packet next to red cardinal flower plants after reading the American Meadows' description that says people often plant it with its "cousin". These are blooming now. I have found that I under-appreciate the blue cardinal flower's bloom because the stunning, bold, and eye-catching red cardinal flower bloom steals the show for me. Perhaps also contributing to "under-appreciation" is that in addition to plants started from seed, I have now discovered MANY blue cardinal flowers growing wild, in an unattended, undeveloped field past our property line, in part sun beyond a small creek at the base of our wooded slope. Prior to growing my own plants from seed, I presumed that these were weeds. (I should explain that I am just now beginning to learn about wildflowers, which includes learning to identify them.) I give the 2013 lot # of American Meadows' blue cardinal flower seeds a 5-star rating because germination performed as expected to yield many seedling plants. I feel sure I will have many blooming blue cardinals in 2014.

        • Was this a gift?:
        • No

        (1 of 1 customers found this review helpful)


        Germinated Well


        from Laurel, MD

        Comments about American Meadows Blue Cardinal Flower Seeds:

        These seeds germinated well, and I am looking forward to the adult plants.

        Displaying reviews 1-3

        Back to top

        Q & A

        Plant With These:

        USDA Hardiness Planting Zones

        To determine if a plant is sufficiently cold hardy, the USDA created numbered zones indicating winter low temperatures; the lower the zone number the colder the winter.

        • If the coldest winter temperature expected in your area is -15°F (zone 5) then any plants rated zones 3-5 will survive the winter temperatures in your area.
        • If you live in very warm winter areas (zones 9-11) plants with zones 3-4 ratings are not recommended. The lack of freezing winter temperatures do not provide a time for winter dormancy (rest).

        Find Your Planting Zone:

        Enter your Zip Code to find your USDA Planting Zone

        You are using an out-of-date browser.

        You will still be able to shop, but some functionality may not work unless you update to a modern browser. Update My Browser


        Please wait...

        Item added to your cart

        has been added to your cart.

        Continue shopping or View cart & checkout