- Partial Sun to Full Sun (At Least 5 Hours of Direct Sunlight)
- Height 28 - 32 Inches
- Width 18 - 20 Inches
- Growing Zones 6-10
One of the few true blue perennials, Starship Blue Cardinal Flower Lobelia is an outstanding example of an improved cultivar. While most L. speciosa hybrids tend to be short lived, this cultivar of L. speciosa is a knock out with its violet blue 1 to 2 inch flowers on tall spikes and its rosette of basal leaves in a bright green. Tending to prefer a very moist to wet habitat, lobelia can be grown in your drier soil with a little care and maintenance from you. It is worth the extra effort! Starship Blue Cardinal Flower Lobelia is one of the earliest flowering lobelia in spring.
Native to North American where it is found in wetlands, along streams and in dense damp woodlands, Lobelia speciosa has intrigued gardeners for centuries. Starship Blue grows reliably in Zones 6-10, preferring the hot humid summers over the cool woodland climates, so it adapts fairly well into a not-so-wet garden environment. Now you have two options for enjoying these lovely perennials, a bog garden, wetland or pond edge garden setting, or a well-drained soil garden where it can be kept consistently moist. This tough perennial can even survive brief floodings, so don’t be afraid to plant it streamside or in a wetland area.
Starship Blue Cardinal Flower Care
Plant in full sun in Northern cooler climates and when in moist to wet conditions, and by rule of thumb, opt for part shade in hot humid Southern gardens. If planting in drier well draining soil, keep it consistently moist with drip irrigation and an application of mulch to hold moisture in, plus keep it in the shade to reduce evaporation of the water in the soil. True of most North American wildflowers, fertilizer is not typically needed. Lobelia tolerates a wide range of soil types from poor to fertile, and also adapts to a wide range of soil pH from acidic to alkaline. This is truly a versatile perennial for warm winter gardeners. This lobelia loves the heat.
Deadheading is not needed to keep lobelia flowering for you, but it does help clean up spent flowers and may trigger a rebloom at a later time. Resist cleaning the foliage up in late fall and winter to allow it to protect the roots in colder winter regions. Mulch the root zone in cold winter zones, and clean everything up in early spring before new growth emerges.
Starship Blue Cardinal Flower Spacing
Space your lobelia 18 to 20 inches apart from other plants to allow it room to grow. Cardinal flowers grow to about 32 inches tall and 20 inches wide so need some room to spread out. Pair this beautiful blue flower with a large hosta, whose flower spikes will rival the lobelia for height and whose base needs are very similar to lobelia, making maintenance a lot easier. All in all, gardeners will agree that Starship Blue Cardinal Lobelia is worth every ounce of care that they expend for it once they see it in their spring gardens.
Starship Blue Cardinal Flower Information
|USDA Hardiness Zones: 6-10|
|Plant Type: Perennial|
|Sunlight Exposure: Partial Sun to Full Sun|
|Mature Height: 28 - 32 Inches|
|Mature Width: 18 - 20 Inches|
|Plant Spacing: 18 - 20 Inches|
|Growth Habit: Upright|
|Flower Color(s): Blue|
|Flower Shade: Blue Shades|
|Seasonal Interest: Mid Summer Late Summer Early Fall|
|Foliage Type: Herbaceous|
|Foliage Color(s): Green/Purple Shades|
|Attracts: Bees, Butterflies, Hummingbirds|
|Resists: Deer, Rabbits|
|Features: Attracts Pollinators, Low Maintenance, Native to North America|
|Uses: Border Plant Mass Planting|
|Plant Brand: Proven Winners|
|Botanical/Scientific Name: Lobelia speciosa 'Blue'|
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Plant Addicts guarantees your plant(s) will arrive happy and healthy, but the plant(s) are being shipped through the mail and accidents happen. If the plant is dead, has dried out roots or the incorrect item was shipped just notify Plant Addicts within 3 days upon delivery. We may ask for pictures but will try to make it as easy as possible for you. Please note plant(s) with damaged branches or wilted leaves will not qualify for this guarantee. Plants are very resilient and will rebound quickly when cared for correctly.
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Standard Colors: 2-3 business days
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Time of Order:
- If there is extreme heat we’ll delay shipping.
- We’ll have to review what areas the plants are traveling through along with your location
Once your plant is shipped you’ll receive an email with tracking information. Depending on the above criteria we’ll ship your plant(s) towards beginning of the following week from your order. We put together this helpful guide of what to do when you receive your plants in the mail.
It is important to know that all of our plants are clearly labeled for which growing zones the plant can survive in. The plants are thoroughly trialed and tested in every growing zone before we state the plant can grow in a zone. Again, our #1 priority is to ship the plants to you healthy and ready to thrive in your location. So we will do everything in our power to do so.