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Nemesia
Nemesia
Nemesia blooms from April through June.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Nemesia
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 9–11. Expect it to reach about 12 in tall and 12 in wide at maturity, in roughly 1 year (a house reading).
No toxicity note is on file for Nemesia. 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 Nemesia
Wait until all danger of frost has passed, then plant out Nemesia into warm soil; in most zones that means late spring. It flowers from April to June.
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 Nemesia get?
12 intall5 ft 7 inan adult12 inwideSee Nemesia 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 Nemesia
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Nemesia about 12 in apart, center to center, so each plant has room to reach its full width.
Add Nemesia 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
Nemesia's height, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases, pests and toxicity were checked against 8 published sources on September 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.
- gardendesign.comGarden Design (magazine), Nemesia: A Care & Growing Guide, by Anne Bal...height, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases, pests and toxicity
- Missouri Botanical GardenPlant Finderheight, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases and pests
- Plant AddictsNemesia category page, the same store as the care article, counted onceheight, spread, hardiness zones, water, bloom months and color, trait tags and pests
- Plant AddictsNemesia Care articleheight, hardiness zones, water, bloom months and color and soil
- ucanr.eduUC Master Gardeners of San Luis Obispo County (UC ANR), Diggin' It in...water, bloom months and color, soil, diseases and pests
- NC State ExtensionPlant Toolboxsun, soil, diseases and pests
- RHSRoyal Horticultural Society (RHS Genus Guide)sun, bloom months and color and soil
- Proven WinnersSucceeding with Nemesiasoil
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.