Blue Spires Rosemary (Rosmarinus officinalis 'Blue Spires') | Upright Columnar Rosemary

Blue Spires Rosemary

1 Gallon

$16.90

1/4

Blue Spires Rosemary

Rosmarinus officinalis 'Blue Spires'

An upright, columnar rosemary with aromatic foliage and profuse deep blue flowers, perfect for hedges and screens.

$16.90

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Bay Area–Based Nursery

We specialize in plants grown and delivered in their original pots and soil.
Because of their size and weight, our plants are not suitable for long-distance shipping and are delivered locally to ensure health and quality.

While delivery is limited to our local service area, we’re happy to support garden design and plant selection remotely.

For local plant professionals, we’re always glad to connect and explore ways to support your customers.

Rosmarinus officinalis 'Blue Spires' is a vigorous, upright evergreen shrub prized for its striking columnar form, aromatic culinary foliage, and profuse deep blue flowers. This popular rosemary variety forms a tall, narrow, upright bush with stiff, branching stems covered in linear, needle-like, gray-green to silvery-green leaves that release a strong, classic rosemary scent when brushed. The leaves are edible and widely used in roasted meats, potatoes, breads, herb oils, and infusions. From late winter through spring, and often sporadically into summer, it produces an abundance of small, two-lipped, tubular, deep violet-blue flowers arranged along vertical spikes, creating a stunning display that is highly attractive to bees, butterflies, and other pollinators. With its excellent tolerance for heat, drought, salt spray, deer, and poor soils, and its naturally upright, columnar habit, it is an outstanding choice for hedges, screens, specimen plantings, herb gardens, Mediterranean landscapes, and large containers.

Knowing how we measure the size?

When browsing our plants, you may notice size terms such as Gallon, Multi, or Stand. These describe how a plant is grown, containerized, or structured at the time of sale — not just its height. Understanding these terms will help you choose the right plant for your space and expectations.

🌱 Gallon Size (Container Size)

Gallon refers to the size of the nursery container the plant is currently growing in (e.g. 1 Gallon, 5 Gallon, 15 Gallon).

A larger gallon size generally means:
- A more established root system
- A sturdier plant
- Faster visual impact after planting
Example:
- 5 Gallon: Ideal for residential gardens, easy to handle, good balance of value and maturity
- 15 Gallon: More mature, provides quicker results in the landscape

Note: Gallon size does not guarantee a specific height, as growth varies by species.

🌳 Multi (Multi-Trunk / Multi-Branch Form)

Multi indicates the plant has multiple trunks or main stems growing from the base.

Commonly used for:
- Ornamental trees
- Feature plants
- Japanese maples, olives, crepe myrtles, etc.
Why choose Multi:
- Fuller, more sculptural appearance
- Strong visual presence even at younger ages
- Popular for design-focused landscapes

🌲 Stand (Single-Trunk / Standard Form)

Stand (short for Standard) refers to a single, dominant trunk with a raised or naturally formed canopy.

Commonly used for:
- Shade trees
- Street trees
- Orchard and structural plantings
Why choose Stand:
- Clean, classic tree form
- Easier clearance for walkways and lawns
- Preferred for long-term structure and uniformity

🌿 Choosing the Right Size

If you want instant impact → larger Gallon, Multi form
If you want long-term structure → Stand form
If you want flexibility and value → mid-size Gallon containers

If you’re unsure which size or form fits your project, our team is happy to help you select the best option based on your space, timeline, and design goals.

Foliage & Flowers: Linear, needle-like, gray-green to silvery-green leaves with strong rosemary fragrance; vertical spikes of small, two-lipped, tubular, deep violet-blue flowers in late winter through spring .
Mature Height: 48-72 inches (4-6 ft)
Mature Spread: 24-36 inches (2-3 ft)
Growth Rate: Moderate to fast
Hardiness Zones: USDA 6-10 ; Sunset 4-24, H1, H2
Light Requirement: Full sun (essential for best growth and flowering)
Core Benefits: Upright, columnar habit, aromatic culinary foliage, profuse deep blue flowers, drought, heat, salt, and deer tolerant.
Best Uses: Hedges, screens, specimen plant, herb gardens, Mediterranean gardens, coastal gardens, large containers.

Q: How tall does Blue Spires Rosemary get?
A: It is an upright, narrow shrub, typically reaching 4-6 feet in height and 2-3 feet in width at maturity.

Q: How is it different from prostrate rosemary varieties?
A: 'Blue Spires' has an upright, columnar growth habit, while prostrate varieties (like 'Irene' or 'Huntington Carpet') are low-growing and spreading, ideal for ground cover.

Q: How much sun does it need?
A: For the densest growth, best flavor, and most abundant flowers, plant in full sun (at least 6 hours of direct sunlight daily).

Q: How much water does it need?
A: Once established, it is highly drought tolerant. Water regularly during its first year, then little to no supplemental water is needed.

Q: Is it a good choice for a hedge?
A: Yes, its upright, narrow habit and dense foliage make it an excellent choice for a low to medium hedge or privacy screen. Space plants 2-3 feet apart for a solid hedge.

Q: Is it deer resistant?
A: Yes, the aromatic foliage is generally resistant to deer and rabbit browsing.