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Image courtesy of North Creek Nursery



Plant Characteristics

Cultural Information*
  • Leaf Spot - High Resistance
  • Root Rot - High Resistance
  • Leaf Scorch - High Resistance
  • Powdery Mildew - High Resistance
Flower Color*
  • White
Flower Type*
  • Single Blooming
Growth Rate*
  • Fast
Leaf Color Fall*
  • Dark Yellow/Gold
  • Light Yellow/Brilliant Yellow
Leaf Color Spring*
  • Green
Leaf Color Summer*
  • Green
Leaf Type*
  • Deciduous/Herbaceous
Nature Assets*
  • Attracts Bees
  • Attracts Butterflies
Plant Type*
  • Perennial
Preferred Planting Season*
  • Spring Planting
  • Summer Planting
Preferred Soil Conditions*
  • Salt Tolerant
  • Moist
  • Adapts Well to Wet Areas
  • Adapts Well to Most Soil Types
  • Average
  • Well-Drained
Propagation Methods*
  • Cuttings or Divisions
Season of Interest*
  • Fall
  • Summer Flowering
  • Late Spring/Early Summer
  • Spring
  • Late Summer/Early Autumn
  • Summer
Sun Exposure*
  • Prefers Full Sun in Northern States
  • Prefers Full Sun in Southern States
Uses*
  • Accent Plant
  • Wildlife Habitat
  • Mass Planting
  • Near Water Gardens or Ponds
  • Landscape Specimen
  • Under Power Lines
 

Homeowner Growing & Maintenance

Althea is easy to grow and adapts to most conditions. Feed once a year with a slow release fertilizer. To give your plant the best start possible, we include free fertilizer with every order.

Interesting Notes

One of the parents of Blue River II, (H.militaris) was found growing along the Blue River in southern Oklahoma, hence the name.

5.00/5.00 stars Avg. Customer Rating:
(2 reviews)

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BLUE RIVER II HARDY HIBISCUS

Hibiscus x 'Blue River II'

Buy Blue River II Hardy Hibiscus online. This Hardy Hibiscus is a vigorous grower that produces pure white 10" blooms and loves the heat.Note: Hardy Hibiscus will die back to the ground every winter and emerge from the ground in mid to late spring. Remove old canes to the ground in mid winter.If you purchase our potted Hardy Hibiscus when dormant (September - May) you will receive a one to two year old healthy potted root system. The top cut off to allow new shoots to grow in mid to late spring.

Mature Height:

4-5 Feet

Mature Spread:

3-4 Feet

Hardiness Zone:

5-9

What's My Hardiness Zone?

Family: Malvaceae · Common Name: Althea / Rose of Sharon / Hardy Hibiscus

FREE with every plant purchased:

  • The Sooner Guarantee: For details, click here!
  • A pre-measured amount of Polyon® Best-Paks time release fertilizer that keeps your plant well nourished for one year.
  • Pre-hydrated Hydro-Gels are included in the top of each container to use when planting as they help retain soil moisture, and plants will establish more quickly with less transplant shock. Plants will also survive drought-like conditions and accidental missed waterings better.
  • Planting and Care Instruction brochure.
  • Catalogs of new and exciting plant brands, such as Garden Debut® and Proven Winners®.

DIY Irrigation SuppliesWe use and recommend www.dripdepot.com for our irrigation needs, from simple to install micro and drip systems, to commercial grade irrigation parts and supplies.

Purchase BLUE RIVER II HARDY HIBISCUS Online

Jumbo gallon Potted

SKU: 6547

(4.04 qrts / 3.82 liters)
(-6 units available now)
(85 units for review on 6/1/21) Pre-Order
Standard Package
**HARDY HIBISCUS CANNOT BE SHIPPED UNTIL AFTER JUNE 1ST TO GUARANTEE THEY ARE BREAKING DORMANCY**



$30.00

Get Notified SOLD OUT  

2 gallon Potted

SKU: 3945

(1.87 gallons / 7.09 liters)
(0 units available now)

Standard Package
**HARDY HIBISCUS CANNOT BE SHIPPED UNTIL AFTER JUNE 1ST TO GUARANTEE THEY ARE BREAKING DORMANCY**



$40.00

Get Notified SOLD OUT  
   
 

Sooner Help Zone

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Customer Testimonials

Excellent quality and honest business. Packaging was careful and plants came fast and in very good shape. So far we are very pleased with Sooner Plant Farm. Happy to know we can use them for our garden needs.


Azra
Belmont, MA
November 2016

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