Illustration
Exceptional Lavender
Lavandula × intermedia 'Hillav'
Exceptional Lavender blooms from June through October.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Exceptional Lavender
Plant it in full sun. It prefers low water. It is hardy in USDA zones 5–9. Expect it to reach about 2.5 ft tall and 2.5 ft wide at maturity, in roughly 2 years (a house reading).
Is Exceptional Lavender toxic to dogs?
- Listed as toxic to dogs by University of California Agriculture and Natural Resources.
- Not yet checked for cats.
Lists differ and none is complete. If a pet eats a plant and seems unwell, call a veterinarian or a pet poison helpline.
What was checked
Nine facts were checked against named botanical sources, each recorded beside the sources that carried it: mature height and spread, hardiness zones, sun, water, bloom months and color, the trait tags, and years to mature size, which rests on a recorded house rule where no publisher states one and is marked so. Soil, diseases, pests, toxicity and the plant's own names have not yet been read for this plant, and its trait tags are the ones a feature uses rather than every word a page prints. Each fact above carries its own mark. The planting, spacing and size sections are derived from these checked facts by a fixed rule, not checked separately, and the plant type is the library's own classification.
When to plant Exceptional Lavender
Plant Exceptional Lavender in early spring as soon as the soil is workable, or in early fall at least six weeks before your first frost, so roots establish in cool weather. Once settled, it blooms from June to October.
Month-by-month timing for your zone is on the planting calendar; if you garden near zone 7, the middle of this plant's hardy range, start with zone 7 in April. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Exceptional Lavender get?
2.5 fttall5 ft 7 inan adult2.5 ftwideSee Exceptional Lavender in a garden plan: the planner shows it in 3D beside everything else you add, growing toward this size over the years.
How far apart to plant Exceptional Lavender
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Exceptional Lavender about 2.5 ft apart, center to center, so each plant has room to reach its full width.
Add Exceptional Lavender to a garden plan and the planner draws it at its full width, so you see the spacing before you buy.
Where these facts come from
Exceptional Lavender's height, spread, hardiness zones, sun, water, bloom months and color and trait tags were checked against 9 published sources on October 21, 2026. Each one is linked below with every fact it carried, which can include a fact this page still marks as not yet checked, because a source carrying a value is not the same as the value being held to the standard. Facts not in that list, and the planting, spacing and size sections, are not covered by these sources.
- peacetreefarm.comPeace Tree Farmheight, spread, hardiness zones, sun, water, bloom months and color and trait tags
- American Meadowsheight, spread, hardiness zones, sun, water and bloom months and color
- Plant Addictsheight, spread, hardiness zones, sun, water and bloom months and color
- plantipp.euPlantippheight, spread, sun, water, bloom months and color and trait tags
- diggingdog.comDigging Dog Nurseryheight, spread, hardiness zones and bloom months and color
- NC State ExtensionGardener Plant Toolboxsun, water and trait tags
- creekhillnursery.netCreek Hill Nurseryheight and hardiness zones
- RHSRoyal Horticultural Societybloom months and color
- peacetreefarm.comPeace Tree Farmheight
How the checking works, and what each standard covers, is on the verified plants page.
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Design a garden with this
Drop this plant onto a 3D plan, see how it fills in, and watch your whole garden bloom across the year.