Great Blue Lobelia Flowers
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Great Blue Lobelia

As low as $26.95
Availability: In stock
SKU
9710
Planting Pros Recommend:
Nature Hills Root Booster - 4 oz. bag - Only: $9.95
Root Stimulator - 32 oz. bottle - Only: $14.95

Dense Spikes of Bright Blue in Late Summer

The Cardinal Flower 'Great Blue', Lobelia siphilitica 'Great Blue', is a hardy Cardinal Flower bearing tall, leafy spikes of clear blue flowers.

'Great Blue' is a clump-forming perennial with upright leafy stems. It blooms from late summer to mid-autumn, and it bears dense spikes of light to bright blue tubular, two-lipped flowers with a more prominent lower lip; long lasting blooms.

This Cardinal Flower prefers deep, moist soil and should be fertilized every two weeks in spring and early summer to improve flowering. Plants may be trimmed as they die back in hot summers. Use for edgings, near water, or in a mixed or herbaceous border.

  • Long lasting blooms
  • Looks great along edges
  • Bright blue blooms thru mid Autumn

Buying Options for Plants

Nature Hills sells a large variety of plants with several options available. Plants are offered in both potted containers and as dormant bare root without soil. Here is a helpful resource to understand your options as you create a beautiful landscape with help from Nature Hills.

Ever wonder what a larger plant will mean for your landscape? Container Sizes are really all about the age of the plant!

Seasonally, Nature Hills offers hand selected, high quality bare root trees, shrubs and perennials. Bare root plants are sold by height from the top of the root system to the top of the plant. Plants may be taller than the height minimums.

  • Popular sizes of select trees are 1 foot, 2 feet, 3 feet, etc.
  • Popular sizes of select bare root plants is 1 foot, 18 inches, etc.

Nature Hills Container Size by Volume

Young Plants to 18 Months
Size Volume
2"x2"x3" Ranges from .18 to .21 dry quarts / .198 to .23 dry liters in volume
4.5" Container Equal to .655 dry quart / .72 dry liter in volume
3.5" Container Equal to .67 dry quart / .74 dry liter in volume
4" Container Equal to .87 dry quart / .96 dry liter in volume
1 Quart Equal to 1 dry quart / 1.1 dry liter in volume
5.5" Container Equal to 1.89 of a dry quart / 2.08 dry liters in volume
4"x4"x5" Ranges from .8 to 1.1 dry quarts / .88 to 1.2 dry liters in volume
4"x4"x6" Ranges from 1.0 to 1.3 dry quarts / 1.1 to 1.41 dry liters in volume
4"x4"x9" Ranges from 1.1 to 2.1 dry quarts / 1.2 to 2.3 dry liters in volume
4"x4"x10" Ranges from 1.7 to 2.3 dry quart / 1.87 to 2.53 dry liters in volume
Plants 18 Months - 2.5 Years Old
Size Volume
2 Quart Equal to 2 dry quarts / 2.2 dry liters in volume
#1 Container Ranges from 2.26 to 3.73 dry quarts / 2.49 to 4.11 dry liters in volume
5"x5"x12" Equal to 3.5 to 4.3 dry quarts / 3.85 to 4.74 dry liters in volume
Plants 2 - 4 Years Old
Size Volume
#2 Container Ranges from 1.19 to 1.76 dry gallons / 5.24 to 7.75 dry liters in volume
#3 Container Ranges from 2.32 to 2.76 dry gallons / 10.22 to 12.16 dry liters in volume
Plants 3 - 5 Years Old
Size Volume
#5 Container Ranges from 2.92 to 4.62 dry gallons / 12.86 to 20.35 dry liters in volume
#7 Container Ranges from 5.98 to 6.08 dry gallons / 26.34 to 26.78 dry liters in volume

About Plant Sentry™

Plant Sentry is designed to protect both consumers and the nursery trade from invasive plant pests and diseases. Sites that display the Plant Sentry protection badge are protected from consumers buying and nurseries shipping material carrying invasive pests and diseases.

This proprietary eCommerce software prevents the shipment of a restricted plant to each state. The Plant Sentry system includes a shipment certification program. The Plant Sentry Compliance Officer works closely with NatureHills.com and each nursery or fulfillment center to ensure only compliant plants are sold to customers.

click Here to learn more

Shipping

To obtain a more accurate shipment time-frame, simply enter your zip code in the “Find Your Growing Zone” box to the right. Our plants are grown all over the country and lead time on items may be different because of this. Once your order is placed, you will also receive the specific shipment time-frame information as part of your order confirmation. Once an item ships, you will receive shipment notification and tracking numbers, so you can follow along while your plant travels to your doorstep.

Shipping Rates

At Nature Hills we handle, package and ship the products you order with the utmost care to ensure healthy delivery. Shipping and handling charges are calculated based on the tables below. Please note that some items include an additional handling surcharge, these will be noted on the item's product page.

From To S&H
0 - 19.99 14.95
20 - 49.99 17.95
50 - 69.99 19.95
70 - 99.99 24.95
100 - 129.99 29.95
130 - 130+ Approx 25%

Click here to see our full rates

PLANT HIGHLIGHTS

Great Blue Lobelia Is Suited to Grow in Zones 4-9
Growing Zones 4-9
More Information
Botanical Name Lobelia siphilitica
Foliage Green
Mature Height 2 - 3 feet
Mature Spread 10 - 12 inches
Soil Type Moist, normal
Sun Exposure Full Sun, Partial Sun
Flower Color Blue