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ROSMARINUS officinalis 'Blue Boy'

Image of Rosmarinus officinalis 'Blue Boy'



Botanical Name

ROSMARINUS officinalis 'Blue Boy'

Plant Common Name

Blue Boy Rosemary, Dwarf Rosemary, Rosemary

General Description

Noted as being the most compact of the cultivated rosemaries, 'Blue Boy' is very small and has tiny evergreen leaves of green to grey-green and pale lavender-blue flowers that bloom early in the season. It is a slow-growing, more cold-tender selection well-suited to small rock gardens and container plantings.

An old European herb most commonly associated with Mediterranean cooking, rosemary is one of the great culinary plants for the garden. It also doubles as an ornamental with its needle-like foliage, ridged stems, and pale lavender flowers that appear in late winter or spring. Technically a medium-sized woody shrub, it's native to the chaparral lands of southern Europe and North Africa where growing conditions are somewhat arid and the ground porous and well-drained. It’s also adapted to the seaside where it withstands high wind and salt spray.

Throughout the year dark to gray green needle-like leaves densely line the woody stems of rosemary. Plants grown in moister climates have flatter broader greener leaves, and those grown in more arid climates have grayer, more slender leaves that curl under giving them a needle-like appearance. They are potently fragrant from afar offering a piney, minty scent. In mid-spring to early summer, small but appealing edible two-lipped flowers of lavender blue or white appear. These attract bees and small inconspicuous nutlet fruits follow.

Rosemary will prosper in locations with full sun and sharply drained average to poor soil. Established plants are quite drought tolerant, but newly planted specimens require average water until they set roots. Rosemary leaves and stems can be harvested any time of year. Refrain from hard pruning in spring until new growth appears. The leaves are traditionally used to flavor vegetables, pasta sauces and meat, particularly pork, lamb and chicken.

The small and appealing 'Blue Boy' is as drought tolerant as it is versatile. Plant it in sunny spots along walkways or in any small space with good drainage. Plants may develop root and stem rot if grown in poorly drained soil or areas with consistently humid summers.


  • AHS Heat Zone

    12 - 6

  • USDA Hardiness Zone

    8 - 11

  • Sunset Zone

    H1, H2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

  • Plant Type


  • Sun Exposure

    Full Sun

  • Height

    12"-18" / 30.5cm - 45.7cm

  • Width

    12"-18" / 30.5cm - 45.7cm

  • Bloom Time

    Early Spring, Spring, Late Winter

  • Native To

    Southern Europe, Mediterranean

Growing Conditions

  • Soil pH

    Neutral, Alkaline

  • Soil Drainage

    Well Drained

  • Soil type

    Loam, Sand

  • Tolerances

    Drought, Salt

  • Growth Rate


  • Water Requirements

    Drought Tolerant, Average Water

  • Habit


  • Seasonal Interest

    Spring, Summer, Fall, Winter

Ornamental Features

  • Flower Interest


  • Flower Color

    Light Blue, Lavender

  • Fruit Color


  • Foliage Color (Spring)

    Green, Gray Green, Dark Green

  • Foliage Color (Summer)

    Green, Gray Green, Dark Green

  • Foliage Color (Fall)

    Green, Gray Green, Dark Green

  • Foliage Color (Winter)

    Green, Gray Green, Dark Green

  • Bark Color

    Tan, Gray

  • Fragrant Flowers


  • Fragrant Fruit


  • Fragrant Foliage


  • Bark or Stem Fragrant


  • Flower Petal Number


  • Repeat Bloomer


  • Showy Fruit


  • Edible Fruit


  • Showy Foliage


  • Foliage Texture


  • Foliage Sheen


  • Evergreen


  • Showy Bark


Special Characteristics

  • Bark Texture


  • Usage

    Container, Edging, Edible, Herb / Vegetable, Mixed Border, Rock Garden / Wall, Topiary / Bonsai / Espalier

  • Sharp or Has Thorns


  • Invasive


  • Attracts


  • Self-Sowing