Illustration
Jacob Cline
Monarda didyma 'Jacob Cline'
Jacob Cline blooms from July through September.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Jacob Cline
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 3–9. Expect it to reach about 4 ft tall and 3 ft wide at maturity, in roughly 2 years (a house reading).
No toxicity note is on file for Jacob Cline. That is not a clearance: check its safety for people and pets before planting.
What was checked
Fifteen fields were checked against named botanical sources, each recorded beside the sources that carried it, with every unsettled point written down and decided: mature height and spread, hardiness zones, sun, water, bloom months and color, the trait tags, soil, diseases, pests, toxicity, the plant's own names, and years to mature size, which rests on a recorded house rule where no publisher states one and is marked so. 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 Jacob Cline
Plant Jacob Cline 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 3 to 9, spring means March to May 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 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 Jacob Cline get?
4 fttall5 ft 7 inan adult3 ftwideSee Jacob Cline 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 Jacob Cline
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Jacob Cline about 3 ft apart, center to center, so each plant has room to reach its full width.
Add Jacob Cline 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
Jacob Cline's height, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases, pests and toxicity were checked against 17 published sources on September 17, 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 Finderhardiness zones, sun, water, bloom months and color, soil, diseases, pests and toxicity
- New Moon Nurseryheight, hardiness zones, bloom months and color, trait tags, soil, diseases and pests
- Perennial Resource (Walters Gardens)height, hardiness zones, sun, water, bloom months and color, soil and diseases
- Perennials.com (Heritage Perennials)Heritage Perennials (perennials.com, Valleybrook Gardens)height, spread, hardiness zones, bloom months and color, soil, diseases and toxicity
- NC State ExtensionNorth Carolina Extension Gardener Plant Toolboxsun, bloom months and color, soil, diseases, pests and toxicity
- North Creek Nurseriesheight, spread, hardiness zones, bloom months and color, trait tags and diseases
- Plant Addictsheight, spread, hardiness zones, water, bloom months and color and diseases
- RHSRoyal Horticultural Society, RHS Plant Profile for Monarda 'Jacob Cline'height, spread, bloom months and color, soil, diseases and pests
- Mt. Cuba CenterMonarda trialheight, spread, bloom months and color, trait tags and diseases
- plantfinder.nativeplanttrust.orgNative Plant Trust, Garden Plant Finderheight, spread, hardiness zones, diseases, pests and toxicity
- University of Illinois ExtensionHortAnswershardiness zones, water, bloom months and color, soil and diseases
- American Meadowsheight, spread, bloom months and color and diseases
- Pleasant Run NurseryAllentown, New Jerseyheight, spread, hardiness zones and bloom months and color
- sandysplants.comSandy's Plants, Mechanicsville, Virginiaspread, hardiness zones, bloom months and color and pests
- Nature Hills Nurseryhardiness zones, sun, water and diseases
- Mt. Cuba CenterMonarda trial overviewsoil and diseases
- University of Georgia ExtensionUniversity of Georgia Cooperative Extension, CAES Field Report C1332-01sun 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.