Pansies are cool-season flowers that grow and bloom best below about 75°F (Clemson Extension). Plant them in fall, once nights cool toward 65°F, for fall color and, where winters are mild, winter and early-spring bloom (NC State, UF/IFAS). Or plant in early spring: hardened plants can go out about 4 to 2 weeks before your last frost (GardenPal estimate; University of Missouri Extension sets them out in late March or early April in mid-Missouri). In Florida, UF/IFAS gives October to February by zone.
Garden pansies (Viola × wittrockiana) are compact violets, about 6 to 9 inches tall (NC State), grown for flat, often "faced" flowers in almost every color. UF/IFAS calls them cold-tolerant biennials grown as winter annuals in Florida; most gardeners treat them as annuals. Their season is the cool part of the year. NC State says they eventually succumb to summer heat, and Clemson says flowering declines once it gets hot, so timing is about giving them as many cool weeks as possible.
Spring dates by last frost
Pansies are slow from seed. University of Missouri Extension seeds them indoors in early to mid January for mid-Missouri and sets them out in late March or early April, a few weeks ahead of a typical mid-Missouri last frost. GardenPal turns that into an estimate for every region:
| Average last spring frost | Start seed indoors (GardenPal estimate) | Set hardened plants out (GardenPal estimate) |
|---|---|---|
| Mar 1 | Nov 23 – Dec 7 | Feb 1 – Feb 15 |
| Mar 15 | Dec 7 – Dec 21 | Feb 15 – Mar 1 |
| Apr 1 | Dec 24 – Jan 7 | Mar 4 – Mar 18 |
| Apr 15 | Jan 7 – Jan 21 | Mar 18 – Apr 1 |
| May 1 | Jan 23 – Feb 6 | Apr 3 – Apr 17 |
| May 15 | Feb 6 – Feb 20 | Apr 17 – May 1 |
| Jun 1 | Feb 23 – Mar 9 | May 4 – May 18 |
Fall planting
NC State recommends planting pansies in fall for winter and early-spring bloom, and Clemson says they do best when fall and spring are mild. UF/IFAS says they thrive once night temperatures stay below 65°F, and warns that planting too early, while it is still hot, leads to yellow leaves, stretched stems and more disease. GardenPal's estimate is to set fall plants out about 8 to 6 weeks before your first fall frost:
| Average first fall frost | Set out fall pansies (GardenPal estimate) |
|---|---|
| Sep 15 | Jul 21 – Aug 4 |
| Oct 1 | Aug 6 – Aug 20 |
| Oct 15 | Aug 20 – Sep 3 |
| Nov 1 | Sep 6 – Sep 20 |
| Nov 15 | Sep 20 – Oct 4 |
How far fall pansies carry through winter depends on your climate. UF/IFAS says mulch around the base helps insulate roots during cold snaps, and that planting when it is already too cold can stunt them. In cold-winter areas, plan on a fall display and treat any spring regrowth as a bonus (GardenPal note).
Florida and mild-winter areas
In Florida, pansies are winter flowers. UF/IFAS gives these planting months:
| Florida zone | Planting months (UF/IFAS) |
|---|---|
| Zone 8 | October, November, December or February |
| Zone 9 | November, December or February |
| Zones 10 and 11 | November or December |
Site, soil and care
| Step | What extension sources say |
|---|---|
| Sun | Full sun to part shade (NC State); some shade helps them stay healthy (UF/IFAS) |
| Soil | Humus-rich, consistently moist, well-drained (NC State); compost added, pH 5.4 to 5.8 (UF/IFAS) |
| Water | Avoid overhead watering (Clemson Extension) |
| Mulch | Conserves moisture and insulates roots in cold snaps (UF/IFAS) |
| Deadheading | Remove spent flowers to prolong bloom (NC State, UF/IFAS, Clemson Extension) |
| Leggy plants | Cut back by about a third to push new growth (Clemson Extension); trim lanky stems (UF/IFAS) |
Diseases and pests
Wet soil is the main danger. Clemson Extension says black root rot develops more readily in poorly drained or very wet soil, and UF/IFAS warns of crown and root rot when it is warm and wet. NC State also lists leaf spot and powdery mildew, and Clemson notes Cercospora leaf spot in cool fall weather. Pests to watch for are slugs, snails and spider mites (NC State).
Pansies in the vegetable garden
Pansies bloom in the same cool weeks as lettuce, spinach and other cool-season crops, so they make a colorful edging for fall and early-spring beds. NC State says the flowers attract butterflies and other pollinators. For other cool-season flowers, see when to plant snapdragons and when to plant sweet peas, and for what else goes in the ground now, what to plant in fall.
Frequently asked questions
When should I plant pansies?
In fall, once nights cool toward 65°F, or in early spring. NC State recommends fall planting for winter and early-spring bloom; GardenPal estimates setting spring plants out about 4 to 2 weeks before your last frost.
Can pansies survive frost?
Yes, they are cold-tolerant. University of Missouri Extension sets them out in late March or early April in mid-Missouri, and UF/IFAS says mulch helps insulate roots during cold snaps.
When should I start pansy seeds indoors?
About 14 to 12 weeks before your last frost (GardenPal estimate). University of Missouri Extension seeds them in early to mid January for mid-Missouri. UF/IFAS says seed germinates only at 65 to 75°F.
When do you plant pansies in Florida?
UF/IFAS lists October to December or February in zone 8, November, December or February in zone 9, and November or December in zones 10 and 11.
Why are my pansies dying in summer?
Heat. Clemson Extension says pansies grow and flower best below 75°F, and NC State says they eventually succumb to summer heat and should then be removed.
Are pansy flowers edible?
Yes, according to NC State and UF/IFAS, but NC State warns that nursery plants may have been treated with systemic pesticides. Grow your own from seed for eating.
Enter your frost dates to see pansies' cool-season neighbors, such as lettuce, spinach and peas, on one calendar.
Open itSources
- Virginia Cooperative Extension, "Companion Planting in Gardening" (SPES-620P)
- University of Maryland Extension, "Vegetable Succession and Companion Planting"
- Oregon State University Extension, "Companion Planting"
- Penn State Extension, "Herbs Make Good Plant Partners and Companions"
- University of Minnesota Extension, "Planting the vegetable garden"
- USDA Plant Hardiness Zone Map
- NOAA NCEI U.S. Climate Normals (frost/freeze data)
- NC State Extension Gardener Plant Toolbox, "Viola x wittrockiana" (pansy)
- UF/IFAS Gardening Solutions, "Pansies"
- Clemson Cooperative Extension HGIC, "Pansy Diseases & Insect Pests"
- University of Missouri Extension, "Starting Plants Indoors From Seed" (G6570)
Pairings are summarized in our own words from extension-service guidance. Research support for many companion effects is limited, so treat them as good habits, not guarantees.