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Phlox divaricata ssp. laphamii
Phlox divaricata L. ssp. laphamii (Alph. Wood) Wherry
Lapham's phlox, Blue phlox, Sweet william
Synonym(s): Phlox divaricata var. laphamii
USDA Symbol: PHDIL6
USDA Native Status: L48 (N)
Lapham’s Blue Phlox has semi-decumbent stems that send up erect branches 12-30 in. Loose clusters of showy, fragrant, purple flowers, with a dark eye, occur at the top of these stems. The leaves on decumbent stems are broader than those on flowering stems.
Plant CharacteristicsDuration: Perennial Habit: Herb Flower:
Fruit: Size Class:
Bloom InformationBloom Color: Pink , Blue , Purple
Bloom Time: Mar , Apr , May , Jun , Jul
, WV Native Distribution: WI
to e. NE,
s. & e. to FL
& e. TX Native Habitat:
Growing ConditionsLight Requirement: Part Shade
Soil pH: Circumneutral (pH 6.8-7.2)
Soil Description: Humus-rich, moist soils.
Conditions Comments: Blue phlox self-sows readily forming natural drifts.
PropagationDescription: Propagate by division, seed or softwood cuttings (rooted stem) taken in late spring.
Seed Collection: Not Available
Seed Treatment: Cold-moist stratification.
Commercially Avail: yes
Record Last Modified: 2009-04-19
Research By: TWC Staff