Blue Lobelia

Sun And Shade,
Height At Maturity
Under 4 Feet
Planting Zones
Shipped As
5-7 Days
Planting Zones 4-8
Flower Beds, Gardens, Landscaping,

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Blue lobelia is an Annual with Sky-Blue Blossoms.

It grows in groups about a foot wide. It can be planted in flowerbeds as a border or ground cover or in pots and window boxes, where it will cascade over the sides. It's beautiful in a hanging basket, where it will trail down. Blue lobelia can grow in zones 2 to 11 and produces an abundance of bright blue flowers.

It's sometimes thought that blue lobelia won't bloom in the heat, but some varieties, including Magadi Blue, Magadi Blue with White Eye, and Lucia Dark Blue, are heat tolerant. Blue lobelia can thrive in full sun, partial sun, or shade and is notable for being easy to grow, requiring more frequent watering in hot weather.

Blue Lobelia is a Striking Addition to the Garden Majesty


Seeking that 'stand out' plant that will make your visitor's eyes pop? Look no further than Blue Lobelia, an annual whose flowers are a genuinely vibrant, beautiful blue that blooms continuously throughout the summer but is easy to care for and does well in the ground, containers, or window boxes.

Start by sowing seeds or buying fully grown plants. Please place them in a sunny or partially sunny spot in the garden, add a bit of slow-release fertilizer, and water well but don't overwater. Blue lobelia is not a plant that likes being overwatered! They are about six to eight inches when you plant them but can spread to nearly twenty-four inches by mid-summer, so you can trim them to about half height if desired.

Great news, you can even overwinter your plants by keeping them indoors in a sunny location. They will bloom all winter and be ready for re-location come spring. That's two sets of plants for the price of one!

You can even start new plants by setting 4-inch stem cuttings in moist soil in a shaded spot until the new roots form. With minimal effort, your new Lobelias are ready to come spring.

Blue Lobelia is a winner in every way

Botanical Latin Name: Lobelia siphilitica

Common Name: Blue lobelia

Sun Exposure: Light shade

Hardiness Zones: Three to nine

Mature Height: Two to four feet

Spread: Six inches

Spacing: 12 inches

Growth Rate: Fast

Flowering Time: Summer

How Long It Flowers: A month or more

Flower Color: Blue

Soil Requirements: Fertile, moist, loamy soil

Pruning: Since it self-sows abundantly, it might need to be divided


Blue Lobelia is For Sale at TN Wholesale Nursery with Low Prices and Fast Shipping


Reviews (1)

  • 4

    Posted by Josh on Jun 22, 2022

    My wife is excited to see these grow.

Shipping Information

We dig fresh our plants and ship immediately. We ship US Mail, Priority shipping. You will receive a tracking number once your plants ship. All plants will be fine in their packages for up to 3 days after receiving.

How We Protect Your Plants For Transit

We sell only bare root plants. We dip the roots in tera-sorb silicone gel to retain ample moisture for transit and surround with plastic. This is superior protection for plants in transit for up to 12 days.

Upon Receipt Of Your Plants

Open your plants and inspect the same day received. We offer 3 days to report any problems with your order. Bare root plants need to be planted within 2-3 days of receiving unless weather-related problems prohibit planting. Store in a cool place and keep roots moist and covered with plastic until they can be planted. Water for the first week daily after planting.

Shipping Dates
Ships November through April