• Overview
    Light Needs:
    Partial to full sun
    Watering Needs:
    Water regularly - weekly, or more often in extreme heat or containers.
    Average Landscape Size:
    Reaches 1/2 to 1 ft. tall, slowly spreading 3 to 4 ft. wide.
    Key Feature:
    Flowering Groundcover
    Blooms:
    Summer
  • Detail
    Botanical Pronunciation:lith-OH-dor-a dif-FEW-sa
    Deciduous/evergreen:Evergreen
    Growth habit:Spreading
    Growth rate:Slow
    Average landscape size:Reaches 1/2 to 1 ft. tall, slowly spreading 3 to 4 ft. wide.
    Special features:Easy Care, Year-round Interest
    Foliage color:Green
    Blooms:Summer
    Flower color:Blue
    Flower attributesShowy Flowers
    Design IdeasThis blue mat-like perennial looks gorgeous around rocks and landscape boulders. Use at the top of retaining walls or to soften unsightly curbs. Like a groundcover, it spreads over a very large area. Great on slopes, berms and banks to offer both color and erosion control. Though it's ideal for the traditional rock garden, it's also a natural in the Mediterranean landscape.
    Companion PlantsCoral Bells (Heuchera); Japanese Forest Grass (Hakonechloa); Hosta (Hosta); Ligularia (Ligularia); Painted Fern (Athyrium)
  • Care
    Care Information
    Thrives in well-drained, slightly acidic soil. Water deeply, regularly during the first growing season to establish an extensive root system; once established, reduce frequency. Space 2 to 3 ft. apart as groundcover; closer for faster coverage. Control weeds with mulch until plants fill in. .Pruning time: summer after flowering.
    Light Needs:
    <strong>Partial Sun / Partial Shade</strong>: These two terms are often used interchangeably to mean 3-6 (or 4-6) hours of sunlight each day. However, there is a difference.
<strong>Partial shade</strong> typically means the plants will appreciate a more gentle exposure such as the weaker morning or early afternoon sun, with the emphasis on providing the minimum needed shade and sheltering from intense late afternoon sun. <strong>Partial sun</strong> typically means the plants <u>need</u> some direct sun, so the emphasis is on meeting the required minimum hours of sunlight, with filtered sunlight or shade the balance of the day.
Both are best with shelter from the harshest late afternoon sun. This shade could be provided by a structure, a wall, larger plants or  tree(s).
    Partial to full sun
    Watering Needs:
    Water needs: Moderate
    Water regularly - weekly, or more often in extreme heat or containers.
  • History & Lore
    History:
    This group of shrubs is classified in the borage family, Boraginaceae. It was named by German botanist, August Grisebach, 1814-1879, who is most noted as author of Flora of the British West Indian Islands. This genus contains just seven species of low hairy shrubs from Europe, North Africa, and Asia Minor. This species is found in southern Europe and Morocco. It was formerly known as Lithospermum diffusum by Mariano Lagasca y Segura, 1776-1839 of Spain, and many contemporary references still consider this a synonym for L. diffusa. This and other plants were separated from that genus and reclassified in a whole new genus created for them by botanist Ivan Murray Johnston of the Arnold Arboretum at Harvard University, Massachusetts.