Illustration
Blushing Susie
Thunbergia alata 'Blushing Susie'
Blushing Susie blooms from June through October.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Blushing Susie
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 10–11. Expect it to reach about 8 ft tall and 3.5 ft wide at maturity, in roughly 1 year (not yet checked).
No toxicity note is on file for Blushing Susie. 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 Blushing Susie
Blushing Susie sits in a nearly frost-free range (zones 10 to 11): plant it in the cool season, fall through late winter, and let the mild months settle its roots. On the calendar that means October or November, or January or February. Once settled, it blooms from June to October.
Month-by-month timing for your zone is on the planting calendar; if you garden near zone 10, the middle of this plant's hardy range, start with zone 10 in January. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Blushing Susie get?
8 fttall5 ft 7 inan adult3.5 ftwideSee Blushing Susie 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 Blushing Susie
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Blushing Susie about 3.5 ft apart, center to center, so each plant has room to reach its full width.
Add Blushing Susie 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
Blushing Susie's height, spread, hardiness zones, sun and trait tags were checked against 11 published sources on July 29, 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.
- siteone.comSiteOne Landscape Supplyheight, spread, hardiness zones and sun
- superseeds.comPinetree Garden Seedsheight, spread, sun and trait tags
- gardencentermarketing.comGardenCenterMarketing plant databaseheight, spread and hardiness zones
- NC State Extensionspecies pagehardiness zones, sun and trait tags
- OutsideprideSeed Sourceheight, hardiness zones and sun
- RHSRoyal Horticultural Societyheight, spread and sun
- Missouri Botanical Gardenspecies pagehardiness zones and sun
- Swallowtail Garden Seedsheight and hardiness zones
- University of Wisconsin Horticulturespecies pagehardiness zones and sun
- tandmwholesale.comThompson & Morgan Wholesale (breeder)height
- University of Illinois Extensionspecies pagesun
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.