Illustration
Rainbow Pillar
Amelanchier canadensis 'Rainbow Pillar'
Rainbow Pillar blooms from April through April.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Rainbow Pillar
Plant it in part sun. It prefers moderate water. It is hardy in USDA zones 4–8. Expect it to reach about 20 ft tall and 8 ft wide at maturity, in roughly 10 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.
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 Rainbow Pillar
Plant Rainbow Pillar 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 4 to 8, spring means March to May and fall means August or September. Once settled, it blooms in April.
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 Rainbow Pillar get?
20 fttall5 ft 7 inan adult8 ftwideSee Rainbow Pillar 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 Rainbow Pillar
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Give Rainbow Pillar about 8 ft of clear ground in every direction, measured from its center. It is one plant with room around it, not a row, and a raised bed is too small for it.
Add Rainbow Pillar 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
Rainbow Pillar's height, spread, hardiness zones, sun, water, bloom months and color and trait tags were checked against 8 published sources on October 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 Gardenheight, spread, hardiness zones, sun, water, bloom months and color and trait tags
- thetreefarm.comThe Tree Farmheight, spread, hardiness zones, sun, water and bloom months and color
- Chicago Botanic Gardenheight, spread, hardiness zones, sun and bloom months and color
- RHSRoyal Horticultural Societyheight, sun, water and bloom months and color
- shop.baileynurseries.comBailey Nurseriesheight, spread, hardiness zones and sun
- NC State ExtensionPlant Toolboxsun and trait tags
- University of Minnesota Extensionheight and spread
- woodyplants.cals.cornell.eduCornell Universityheight
How the checking works, and what each standard covers, is on the verified plants page.
Where it grows wild
A garden form of Shadblow Serviceberry (Amelanchier canadensis)
Its wild parent is native to 18 states and 4 provinces.
Its parent's own page: Shadblow Serviceberry.
United States: Alabama, Connecticut, Delaware, District of Columbia, Georgia, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, North Carolina, Pennsylvania, Rhode Island, South Carolina, Tennessee, Vermont, Virginia and 6 more
Canada: New Brunswick, Nova Scotia, Prince Edward Island, Quebec
Also grows wild, but is not native, in Illinois.
Range data from the World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 4.0, adapted) and USDA PLANTS. How the native range is credited.
Good to know about Rainbow Pillar
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.
Safety
The berries are edible, but the seeds, leaves and wood hold cyanogenic glycosides and can poison browsing livestock; the fruit itself is safe for people and birds. per PubMed Central and 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.