Lupinus diffusus

Sky Blue Lupine

Fabaceae (Leguminosae)

Plant Specifics

Form:Flower
Life Span:Biennial
Flower Color:Blue, lavender
Fruit Color:Green
Phenology:Evergreen
Noted for:Showy flowers, Showy fruits, Interesting foliage

Landscaping

Recommended Uses:Wildflower garden where it can be used as a specimen plant.
Considerations:Hard to establish. Biennial, though may reseed.
Propagation:Seed. Known to be difficult to transplant especially if roots are disturbed.
Availability:Seed
Light: Full Sun
Moisture Tolerance:
always floodedextremely dry
 (Short very dry periods ----- to ----- Very long very dry periods)
Moisture Tolerance: Short very dry periods ----- to ----- Very long very dry periods
Salt Water Flooding Tolerance:Not salt tolerant of inundation by salty or brackish water.
Salt Spray/ Salty Soil Tolerance:Low/no tolerance of salty wind or direct salt spray
Soil or other substrate:Sand
Soil pH:

Ecology

Wildlife:
Insects:
  

  • Larval host for  Frosted Elfin (Callophyris irus) butterfly, which is Listed Endangered in Florida.  Also larval host fory Grey Hairstreak (Strymon melinis) butterfly,  Genista Broom Moth (Uresiphita reversalis)a nd other butterflies and moths that use members of the Fabaceae family (FNPS blog).
  • Attracts bees including bumblebees.  Documented visitors include Anthidiellum notatum rufimaculatum, A. perplexum, Megachile exilis parexilis, Osmia sp. and Bombus griseocollis (Deyrup et al. 2002).

Native Habitats:

Distribution and Planting Zones

Natural Range in Florida
USDA Zones

Suitable to grow in:
10A 10B 8A 8B 9A 9B 

USDA zones are based on minimum winter temperatures

Comments

General Comments:

Given that this is short-lived (biennial) and difficult to transplant or grow from seed, this is perhaps best encouraged in places where it grows naturally.  Minimizing competition from other plants, and perhaps burning the garden area, may be useful.  This plant appears to have a seedbank with seeds that may sprout over an extended period of years if conditions are right.

The range of this plant in Florida appears to be disjunct though how much of this is due to site conditions and how much could be an artifact of forestry practices is unknown.