Illustration
Emerald Tassels
Amaranthus caudatus 'Emerald Tassels'
Emerald Tassels blooms from July through October.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Emerald Tassels
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 9–11. Expect it to reach about 3.5 ft tall and 1.5 ft wide at maturity, in roughly 1 year (a house reading).
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 Emerald Tassels
Wait until all danger of frost has passed, then plant out Emerald Tassels into warm soil; in most zones that means late spring. Planted then, it flowers from July to October.
Month-by-month timing for your zone is on the planting calendar; if you garden near zone 9, the middle of this plant's hardy range, start with zone 9 in February. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Emerald Tassels get?
3.5 fttall5 ft 7 inan adult1.5 ftwideSee Emerald Tassels 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 Emerald Tassels
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Emerald Tassels about 1.5 ft apart, center to center, so each plant has room to reach its full width.
Add Emerald Tassels 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
Emerald Tassels' height, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases, pests and toxicity were checked against 13 published sources on August 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 GardenPlant Finderheight, spread, hardiness zones, sun, water, bloom months and color, soil, diseases, pests and toxicity
- NC State ExtensionPlant Toolboxheight, spread, hardiness zones, sun, water, bloom months and color, soil, diseases, pests and toxicity
- hudsonvalleyseed.comHudson Valley Seed Companyheight, spread, hardiness zones, sun, water, bloom months and color and soil
- Johnny's Selected Seedsheight, hardiness zones, sun, bloom months and color, trait tags and soil
- Chicago Botanic GardenPlant Finderhardiness zones, sun, water, bloom months and color and soil
- ufseeds.comUrban Farmerheight, sun, water and bloom months and color
- harrisseeds.comHarris Seedsheight, spread and bloom months and color
- siskiyouseeds.comSiskiyou Seedsheight, hardiness zones and bloom months and color
- snakeriverseeds.comSnake River Seed Cooperativeheight, bloom months and color and trait tags
- wildgardenseed.comWild Garden Seedbloom months and color
- blogs.cornell.eduCornell University High Tunnels, Cut Flower Cropssoil
- ipm.missouri.eduUniversity of Missouri Integrated Pest Management, Missouri Environmen...sun
- poisonousplants.ansci.cornell.eduCornell University Department of Animal Science, Plants Poisonous to L...toxicity
How the checking works, and what each standard covers, is on the verified plants page.
Good to know about Emerald Tassels
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.
Safety
Non-toxic to pets, but grazing livestock is the exception: heavy eating of the leaves accumulates nitrate and can cause kidney failure in cattle, sheep, and pigs. per ASPCA and University of Arizona
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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.