Illustration
Sombrero Lemon Yellow
Echinacea 'Sombrero Lemon Yellow'
Sombrero Lemon Yellow blooms from June through September.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Sombrero Lemon Yellow
Plant it in full sun. It prefers low water. It is hardy in USDA zones 4–9. Expect it to reach about 22 in tall and 20 in wide at maturity, in roughly 2 years (not yet checked).
No toxicity note is on file for Sombrero Lemon Yellow. That is not a clearance: check its safety for people and pets before planting.
What was checked
Mature height and spread, hardiness zones, sun and the trait tags were checked against named botanical sources for this plant. The bloom months and water need on this page were not, and each fact above says which. 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 Sombrero Lemon Yellow
Plant Sombrero Lemon Yellow 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 9, spring means March to May 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 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 Sombrero Lemon Yellow get?
22 intall5 ft 7 inan adult20 inwideSee Sombrero Lemon Yellow 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 Sombrero Lemon Yellow
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Sombrero Lemon Yellow about 20 in apart, center to center, so each plant has room to reach its full width.
Add Sombrero Lemon Yellow 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
Sombrero Lemon Yellow's height, spread, hardiness zones, sun and trait tags were checked against 13 published sources on July 30, 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.
- saundersbrothers.comSaunders Brothersheight, spread, hardiness zones, sun, years to mature size and trait tags
- Walters Gardensheight, spread, hardiness zones, sun, years to mature size and trait tags
- almostedenplants.comAlmost Edenheight, spread, hardiness zones, sun and trait tags
- darwinperennials.comDarwin Perennials (breeder)height, spread, hardiness zones, sun and trait tags
- hoffienursery.comHoffie Nurseryheight, spread, hardiness zones, sun and trait tags
- Missouri Botanical GardenPlant Finderheight, spread, hardiness zones, sun and trait tags
- Plant Addictsheight, spread, hardiness zones, sun and trait tags
- Proven Winnersheight, spread, hardiness zones, sun and trait tags
- NC State ExtensionPlant Toolboxhardiness zones, sun and trait tags
- US plant patent (Google Patents)'Balsomemy', the original SOMBRERO Lemon Yellowhardiness zones, years to mature size and trait tags
- US plant patent (Google Patents)'Balsomemyim', SOMBRERO Lemon Yellow Improvedhardiness zones, years to mature size and trait tags
- agsci.psu.eduPenn State Flower Trialsheight and spread
- Mt. Cuba CenterTrial Gardenheight and spread
How the checking works, and what each standard covers, is on the verified plants page.
Featured in these guides
Explore similar plants
You might also like
Foliage
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.