Illustration
Blue Blaze Viburnum
Viburnum dentatum 'Blubzam'
Also called blue blaze arrowwood
Blue Blaze Viburnum blooms from May through June.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Blue Blaze Viburnum
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 3–8. Expect it to reach about 5 ft tall and 5.5 ft wide at maturity, in roughly 4 years (a house reading).
Pets
- Not yet checked for pets.
Lists differ and none is complete. If a pet eats a plant and seems unwell, call a veterinarian or a pet poison helpline.
No toxicity note is on file for Blue Blaze Viburnum. 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 Blue Blaze Viburnum
Plant Blue Blaze Viburnum 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 5, the middle of its hardy zones 3 to 8, spring means April to June 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 5, the middle of this plant's hardy range, start with zone 5 in April. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Blue Blaze Viburnum get?
5 fttall5 ft 7 inan adult5.5 ftwideSee Blue Blaze Viburnum 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 Blue Blaze Viburnum
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Blue Blaze Viburnum about 5.5 ft apart, center to center, so each plant has room to reach its full width.
Add Blue Blaze Viburnum 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
Blue Blaze Viburnum's height, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases, pests and toxicity were checked against 11 published sources on October 10, 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.
- Plant Addictsthe store this queue entry names; it files the plant under the brand A...height, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases and pests
- abnativeplants.comAmerican Beauties Native Plants (the brand)height, spread, hardiness zones, sun, water, bloom months and color, trait tags and soil
- Missouri Botanical GardenViburnum dentatum species pagehardiness zones, sun, water, bloom months and color, soil, diseases and pests
- pridescorner.comPrides Corner Farms (Lebanon, Connecticut; the brand's licensed wholes...height, spread, hardiness zones, water, bloom months and color, trait tags and soil
- NC State ExtensionViburnum dentatum species pagesun, water, trait tags, soil, diseases, pests and toxicity
- lakecountynursery.comLake County Nursery (the introducer; its LCN Selections sell sheet for...height, spread, hardiness zones, bloom months and color and soil
- plants.franzwitte.comNetPS Plant Finder entry, printed by Franz Witte (Nampa, Idaho)height, spread, hardiness zones, bloom months and color and trait tags
- Chicago Botanic Gardenarchived record for Viburnum dentatum 'Blubzam'hardiness zones, sun, water and bloom months and color
- Internet Archive (archived page)Lake County Nursery (the introducer; its own web page for this plant,...height, spread, water and bloom months and color
- woodyplants.cals.cornell.eduCornell University Woody Plants Database (HORT/LA 4910/4920)height and spread
- woodyplants.cals.cornell.eduCornell University Woody Plants Database (Viburnum dentatum species pa...soil and pests
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.