Free Shipping on Orders $199+

Growing Zone: | Garden in
Find your Growing Zone!

Starship™ Blue Cardinal Flower

Lobelia x speciosa 'Pas1302712'

  • Starship™ Blue Lobelia Produces Towering Spikes of Intense Royal Blue Flowers All Season Long
  • Heat Tolerant: Thrives in Zones 6-10
  • Grows 2-3 ft Tall, 1-2 ft Wide
  • Pollinator-Friendly Perennial
  • Moderate-Growing in Full Sun to Partial Shade
Regular price $3494
Shipping calculated at checkout.
Out of stock
Plant not supported in Growing Zone. Update address

Unfortunately, this item cannot be shipped to your state.

Shipping to a different address?

Shipping to your area may be delayed due to weather conditions.

Shipping to a different address?

Enter your ZIP code to check shipping availability.

Find your Growing Zone
Plant Size

Planting & Care

Where to Plant

  • Sunlight: This variety performs best in full sun, requiring at least six hours of direct light to maintain its deep violet-blue color and sturdy stems. In hotter climates, provide afternoon shade to prevent the foliage from wilting during the peak heat of the day.
  • Soil: These plants crave moisture and thrive in rich, organic soil that mimics a streambank. If you have heavy clay, mix in compost to help it hold moisture without becoming stagnant, as they dislike drying out completely.

Watering Requirements

Keep the soil consistently moist during the first year while the root system anchors itself. Once established, Starship™ Blue remains a moisture lover and will need deep watering twice a week if rainfall is scarce. If the soil stays dry for too long, the plant will show stress through scorched leaf edges and a shorter blooming window.

Pruning Tips

Since these flowers bloom on new wood produced during the current growing season, wait until early spring to cut the old stems back to about three inches above the ground. This timing protects the crown of the plant during winter and ensures you do not accidentally remove any emerging flower buds. Think of it as a seasonal reset that clears the way for fresh, vigorous growth and taller flower spikes.

Fertilizer Needs

Apply a balanced, slow release fertilizer in early spring just as new green growth appears to fuel the intense blooming period. Avoid using high nitrogen fertilizers late in the summer, as this encourages soft, leafy growth that is easily damaged by the first frost. A single application of a general purpose garden food is usually enough to support its high energy needs throughout the season.

Delivery and Shipping

Shipping Rates

Ships in 7-10 business days • Tracking provided • Weather protected

Under $50 $9.99
$50 - $99.99 $14.99
$100 - $149.99 $16.99
$150 - $198.99 $24.99
$199+ FREE

✓ Zone-specific timing • ✓ Professional packaging • ✓ Health guarantee

Specifications

Plant specifications
Botanical Name Lobelia x speciosa 'Pas1302712'
Class Magnoliopsida
Species x speciosa
Cultivar Pas1302712
Growing Zones 6-10
Height 2-3 ft
Width 1-2 ft
Sunlight Full sun, Partial shade
Growth Rate Moderate
Flower Color Purple
Leaf Color Green
Bloom Period Early Summer, Late Summer, Early Fall, Late Fall
Does Not Ship To AK, HI, ID, MT, PR

Frequently Asked Questions

How tall and wide does Starship Blue Cardinal Flower grow at maturity?

  • Starship Blue Cardinal Flower reaches 28-32 inches tall with an 18-20 inch spread at maturity. This compact size makes it ideal for borders and mixed perennial beds where you need vertical interest without overwhelming smaller plants.

Does Starship Blue Cardinal Flower prefer moist soil or can it handle dry conditions?

  • Starship Blue Cardinal Flower thrives in moist to high-moisture soil conditions and won't tolerate dry sites well. This Lobelia hybrid needs consistent moisture to support its vigorous growth and extended bloom period from mid-summer through fall. Plant in naturally moist areas or plan for regular watering, available at naturehills.com.

Is Starship Blue Cardinal Flower good for boggy or wet areas?

  • Yes, Starship™ Blue Cardinal Flower thrives in moist to high-moisture soil conditions, making it excellent for boggy or wet areas. This 28-32 inch perennial tolerates waterlogged conditions better than most flowering plants. Plant it in zones 6-10 where consistent moisture is available.

Does Starship Blue Cardinal Flower need full sun or part shade?

  • Starship Blue Cardinal Flower thrives in full sun conditions. This Lobelia hybrid performs best with abundant sunlight to produce its signature deep violet-blue flower spikes from mid-summer through fall. Plant in a sunny location with consistent moisture for optimal blooming.

What is the plant spacing for Starship Blue Cardinal Flower?

  • Plant Starship Blue Cardinal Flower 18-24 inches apart. With its 18-20 inch spread and upright growth to 32 inches tall, this spacing prevents overcrowding while creating impactful drifts. Shop at Nature Hills for zones 6-10.

Find Your Garden's Growing Zone!

Your Current Growing Zone:

Zone

ZIP Code:

✓ Growing Zone Set Successfully!

Your zone has been saved and will be used throughout the site.

⚠ Unable to locate a growing zone for that ZIP code.

Please check your ZIP code and try again.

Looking up your growing zone...

When ordering a tree or plant, make sure to know your planting zone.

You can determine your garden's USDA hardiness zone by entering your Zip Code below.