Illustration
Blackjack Gold Black-Eyed Susan
Rudbeckia triloba 'Blackjack Gold'
Also called blackjack gold, blackjack gold brown-eyed susan, blackjack gold rudbeckia and black jack gold
Blackjack Gold Black-Eyed Susan blooms from July through September.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Blackjack Gold Black-Eyed Susan
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 3–8. Expect it to reach about 3.5 ft tall and 1.5 ft wide at maturity, in roughly 2 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 Blackjack Gold Black-Eyed Susan. 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 Blackjack Gold Black-Eyed Susan
Plant Blackjack Gold Black-Eyed Susan 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 July 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 Blackjack Gold Black-Eyed Susan get?
3.5 fttall5 ft 7 inan adult1.5 ftwideSee Blackjack Gold Black-Eyed Susan 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 Blackjack Gold Black-Eyed Susan
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Blackjack Gold Black-Eyed Susan about 1.5 ft apart, center to center, so each plant has room to reach its full width.
Add Blackjack Gold Black-Eyed Susan 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
Blackjack Gold Black-Eyed Susan'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 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.
- NC State ExtensionRudbeckia triloba, SPECIES pageheight, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases, pests and toxicity
- patuxentnursery.comPatuxent Nursery (Bowie, Maryland)height, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil and pests
- Plant Addictsthe store this queue came fromheight, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil and diseases
- plants.westonnurseries.comWeston Nurseries (Massachusetts), printing the NetPS Plant Finder entryheight, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil and pests
- abnativeplants.comAmerican Beauties Native Plants (the brand)height, spread, hardiness zones, sun, water, bloom months and color, trait tags and soil
- rareroots.comRare Roots (mail-order grower, Virginia)height, spread, hardiness zones, sun, water, bloom months and color, trait tags and soil
- High Country Gardensmail-order nurseryheight, spread, hardiness zones, sun, water, bloom months and color and pests
- pridescorner.comPrides Corner Farms (wholesale grower, Lebanon, Connecticut)height, spread, hardiness zones, sun, bloom months and color, trait tags and diseases
- RHSRoyal Horticultural Society, RHS Plants (Rudbeckia triloba 'Blackjack...height, spread, sun, water, bloom months and color, diseases and pests
- Internet Archive (archived page)Jelitto Perennial Seeds (the breeder; its product page for this plant,...height, spread, hardiness zones, water and bloom months and color
- agsci.psu.eduPenn State Flower Trials (The Pennsylvania State University; the 2021...height, spread and bloom months and color
- agsci.psu.eduPenn State Flower Trials (The Pennsylvania State University; the 2019...height, spread and bloom months and color
- agsci.psu.eduPenn State Flower Trials (The Pennsylvania State University; the 2020...height, spread and bloom months and color
- nybg.orgNew York Botanical Garden, Plant Talk ('Sunflowers of Every Size and S...height, bloom months and color and trait tags
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.