General Plant Information (Edit)
Plant Habit: Shrub
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Water Preferences: Mesic
Soil pH Preferences: Moderately acid (5.6 – 6.0)
Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Minimum cold hardiness: Zone 6a -23.3 °C (-10 °F) to -20.6 °C (-5 °F)
Maximum recommended zone: Zone 8b
Plant Height: 6 - 12 inches
Plant Spread: 12 - 18 inches
Leaves: Evergreen
Other: Narrow, pubescent/velvety.
Flowers: Showy
Flower Color: Bi-Color
Other: Star-shaped, white, outlined in vibrant blue.
Bloom Size: Under 1"
Flower Time: Spring
Late spring or early summer
Suitable Locations: Xeriscapic
Uses: Erosion control
Groundcover
Will Naturalize
Wildlife Attractant: Bees
Resistances: Deer Resistant
Drought tolerant
Toxicity: Other: May cause contact dermititis in some individuals.
Propagation: Seeds: Sow in situ
Start indoors
Propagation: Other methods: Cuttings: Tip
Other: Semi Hardwood cuttings.
Containers: Suitable in 3 gallon or larger
Needs excellent drainage in pots
Miscellaneous: Patent/Plant Breeders' Rights: PP 20,078

Image
Common names
  • Purple Gromwell
  • Lithodora
Botanical names
  • Accepted: Glandora prostrata
  • Synonym: Lithodora prostrata
Also sold as:
  • Lithodora diffusa 'White Star'

Photo Gallery
Location: Salt Lake City, Utah, United States
Date: 2019-05-15
Location: Toronto, Ontario
Date: 2020-06-21
Purple Gromwell (Glandora prostrata 'White Star').
Location: Lowes Garden Center, MI
Date: 2012-05-05
Location: Lowes Garden Center, MI
Date: 2012-05-05
Location: Lowes Garden Center, MI
Date: 2012-05-05
Location: Lowes Garden Center, MI
Date: 2012-05-05
Location: Lowes Garden Center, MI
Date: 2012-05-05
Location: Hamilton Square Garden, Historic City Cemetery, Sacramento CA.
Date: 2016-03-21
Zone 9b. This old clump of 'White Star' has a mix of flowers this
Comments:
  • Posted by sedumzz (Fairfax VA - Zone 7a) on Mar 19, 2022 4:20 PM concerning plant:
    This variety can randomly revert to the full blue or full white Lithodora.

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