Illustration
Sarah Mountain Laurel
Kalmia latifolia 'Sarah'
Also comes in pink.
Sarah Mountain Laurel blooms from May through June.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Sarah Mountain Laurel
Plant it in part shade. It prefers moderate water. It is hardy in USDA zones 5–8. Expect it to reach about 4.5 ft tall and 4.5 ft wide at maturity, in roughly 10 years (checked).
No toxicity note is on file for Sarah Mountain Laurel. That is not a clearance: check its safety for people and pets before planting.
What was checked
Mature height and spread, hardiness zones, sun, water, bloom months and color and the trait tags were checked against named botanical sources for this plant, with what the sources could not settle written down; years to mature size rests on a recorded house rule where no publisher states one, and is marked so; its common name and alternate names have not been checked yet. 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 Sarah Mountain Laurel
Plant Sarah Mountain Laurel 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. In zone 6, the middle of its hardy zones 5 to 8, spring means March to May and fall means August or September. Once settled, it blooms from May to June.
Month-by-month timing for your zone is on the planting calendar; if you garden near zone 6, the middle of this plant's hardy range, start with zone 6 in March. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Sarah Mountain Laurel get?
4.5 fttall5 ft 7 inan adult4.5 ftwideSee Sarah Mountain Laurel 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 Sarah Mountain Laurel
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Sarah Mountain Laurel about 4.5 ft apart, center to center, so each plant has room to reach its full width.
Add Sarah Mountain Laurel 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
Sarah Mountain Laurel's height, spread, hardiness zones, sun, water, bloom months and color, years to mature size, trait tags, soil, diseases, pests and toxicity were checked against 8 published sources on September 23, 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.
- Missouri Botanical GardenPlant Finderheight, spread, hardiness zones, sun, water, bloom months and color, years to mature size, trait tags, soil, diseases, pests and toxicity
- NC State ExtensionPlant Toolboxheight, spread, hardiness zones, sun, water, bloom months and color, years to mature size, trait tags, soil, diseases, pests and toxicity
- Plant Addictsheight, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil and diseases
- saundersbrothers.comSaunders Brothers (American Beauties Native Plants brand listing)height, spread, hardiness zones, sun, water and bloom months and color
- briggsnursery.comBriggs Nurseryheight, spread, hardiness zones, bloom months and color and trait tags
- plantdatabase.uconn.eduUniversity of Connecticut Plant Databasehardiness zones, bloom months and color, soil, diseases and pests
- pridescorner.comPrides Corner Farmsheight, spread, hardiness zones and bloom months and color
- brokenarrownursery.comBroken Arrow Nursery (the introducer)hardiness zones, bloom months and color and diseases
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.