Illustration
Quick Fire Hydrangea
Hydrangea paniculata 'Bulk'
Also called quick fire and panicle hydrangea
Quick Fire Hydrangea blooms from June through September.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Quick Fire Hydrangea
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 3–8. Expect it to reach about 6 ft tall and 5.5 ft wide at maturity, in roughly 4 years (a house reading).
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 Quick Fire Hydrangea
Plant Quick Fire Hydrangea 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 June to September.
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 Quick Fire Hydrangea get?
6 fttall5 ft 7 inan adult5.5 ftwideSee Quick Fire Hydrangea 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 Quick Fire Hydrangea
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Quick Fire Hydrangea about 5.5 ft apart, center to center, so each plant has room to reach its full width.
Add Quick Fire Hydrangea 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
Quick Fire Hydrangea's height, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases, pests and toxicity were checked against 14 published sources on August 2, 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, trait tags, soil, diseases and pests
- NC State ExtensionGardener Plant Toolboxheight, spread, hardiness zones, sun, years to mature size, trait tags, soil, diseases, pests and toxicity
- Proven Winnersintroducerheight, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil and diseases
- Chicago Botanic GardenPDF, read with pdftotextheight, spread, hardiness zones, sun, bloom months and color, soil, diseases and pests
- Nature Hills Nurseryheight, spread, hardiness zones, sun, years to mature size and trait tags
- The Tree Centerheight, spread, hardiness zones, sun, years to mature size and trait tags
- Missouri Botanical GardenPlant Finderheight, spread, hardiness zones, sun and trait tags
- hydrangeasplus.comHydrangeas Plus (specialist hydrangea nursery)height, spread, hardiness zones and trait tags
- The Morton ArboretumLisle, Illinoisheight, hardiness zones, water and soil
- Oregon State UniversityLandscape Plantsheight, hardiness zones and sun
- US plant patent (Google Patents)Rein Bulkheight and bloom months and color
- woodyplants.cals.cornell.eduCornell University Woody Plants Databaseheight, hardiness zones and sun
- ASPCAAnimal Poison Controltoxicity
- NC State Extensiongenus pagetoxicity
How the checking works, and what each standard covers, is on the verified plants page.
Good to know about Quick Fire Hydrangea
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.
Safety
Toxic to dogs, cats and horses; the leaves and buds hold a cyanogenic glycoside. Eating it mostly causes vomiting and diarrhea. per ASPCA
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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.