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Hardiness Zone Map


Lobelia

Lobelia

Cardinal Flower

In the dog days of August, just when the border is not looking so lively, this genus of colorful, stately selections rejuvenates the garden with spectacular leafy flowering spires, attracting crowds of eager hummingbirds. Perfect in meadow plantings, these sturdy herbaceous perennials appreciate a well drained site, a light winter mulching, rich, moist soils and partial shade in warm climates, except for Lobelia tupa and Lobelia laxiflora, which like it hot and on the dry side.

<i>Lobelia</i> ‘Grape Knee-Hi’

Have you grown weary of Lobelias, whose lovely blooms reside above a rather untidy base? If so, you may be interested in Dan Heim’s brilliant solution to this age-old challenge—a small-statured L. cardinalis and L. syphilitic backcross, known as ‘Grape Knee-Hi’. Painted with vibrant deep purple hues, the long lasting and freely flowering, tightset spikes crown upright stalks and good-looking compact foliage that stands on its own all season long.

Blooms July-August

Size: 2' 0" high x 15" wide.

Hardy to zone 6.

<i>Lobelia</i> ‘La Fresco’

We have Thurman Maness to thank for this lovely cultivar, another cross between Lobelia cardinalis and Lobelia siphilitica. A dense tower of dusky plum flowers creates a pleasing blend of muted purples when planted with Verbena hastata and Astrantia ‘Lars’.

Blooms August–early October.

Size: 2-1/2' – 3' 0" high x 18" wide.

Hardy to zone 4.

<i>Lobelia laxiflora</i>

A lush-looking, bushy perennial capable of enduring considerable neglect, this impressive Lobelia plays host to festive bicolored blooms. Spreading by underground rhizomes, a close thicket of slender, yet sturdy, red-tinted stems strikingly set off narrow and lustrous, pointed green leaves that extend 2 to 4 in. Slim, 2 in. long red tubes are loosely clustered at shoot tips, while each bright-hued flower flares to reveal a sunny yellow throat.

Hailing from Arizona and Mexico, the Mexican Lobelia entices gardeners and hummingbirds alike with nectar-rich blossoms, can tolerate some shade, but looks its best in sunny, dry sites and has been reputed to possess anti-inflammatory alkaloids.

Blooms June–September.

Size: 2' 0" – 2-1/2' high x 2' 0" – 3' 0" wide.

Hardy to zone 8.

Dressed in a crisp snowy white, the profusely flowered tapers of this Lobelia stand in sharp relief to its dark green foliage. A newly selected form of our U.S. native, ‘White Candles’s small, compact stature keeps its lift all season, lending a clean and classic look, especially when partnered with Geranium ‘Orion’.

Blooms July–August.

Size: 18" – 20" high x 18" wide.

Hardy to zone 5.

Lobelia tupa
 Full Sun  Partial Shade
<i>Lobelia tupa</i> <i>Lobelia tupa</i>

The lush tropical color scheme of this somewhat tender Chilean native is alluring. Cloaked in broad and pointed, pale green, felted foliage, each soaring, purple-tinged stem is crowned with a large, tapering raceme of warm brick-red blossoms. From the swollen base of each flower, a claw-like lower lip curls under and a tuft of gray stamens extends upward. A perennial of nearly monumental stature that likes it hot and on the dry side, Lobelia tupa can be associated with Melianthus, Muhlenbergia and Morina longifolia for a dynamic mélange of color and shape in the border.

Blooms July|#8211;October

Size: 6' 0" – 8' 0" high x 3' 0" – 4' 0" wide.

Hardy to zone 8.

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Latest News

Late Season 2019 Sale has been extended!

Purchase a minimum of $100…MORE



Current Staff's Favorite Plant

Current Staff's Favorite Plant

Our Featured Plant: Hydrangea quercifolia ‘Snowflake’

Click here to view our latest newsletter: Ogle over Oakleaf Hydrangeas, November Pizzazz, Late Season Sale Extended!

Ogle over Oakleaf Hydrangeas...

Large showy conical panicles and bold unmatched foliar texture are the hallmark of these stylish long-lived deciduous shrubs. Perfect for fresh or dried arrangements, the well-endowed lacy blooms unfurl in ivory to dusky rose shades from July through late summer. Broad lobed dark green leaves remain evergreen in warmer climates and signal autumn with cozy scarlet and burgundy tones. Appreciative of dappled afternoon shade, Hydrangea quercifolias boast easy-care habits, handle occasional dry conditions and respond readily to pruning. Be sure to check out our Oakleaf Hydrangea selections in the shrub section of our website. 

November Pizzazz...

November’s shorter days and cooler nights have ignited the garden with spectacular foliar color. An array of woody plants coupled with herbaceous perennials and ornamental grasses promote an abundance of beckoning late season pizzazz. The plants included in this newsletter afford either ample berries, late blooms, commanding leaves or tasteful branching patterns.

Happy Digging from all of us Plant Wranglers! 

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