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When to plant snapdragons

Start snapdragons seeds indoors 6 to 10 weeks before the last frost, plant them out from 2 weeks before the last frost until it and plant again for fall 8 to 12 weeks before the first fall frost.

Your dates for snapdragons

Set your ZIP code at the top of the page and we will work out when to plant snapdragons where you live, from the frost records of the nearest NOAA weather station. Your ZIP code is remembered on this device only.

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Snapdragons planting dates by zone

JFMAMJJASOND Zone 4b Zone 5b Zone 6b Zone 7b Zone 8b Zone 9a
Start indoorsPlant outFall plantingDates use each zone's typical frost dates. Enter your ZIP code for your own.
Dates from each zone's typical (median) frost dates.
ZoneStart indoorsPlant outFall planting
Zone 2aMar 10 to Apr 7May 5 to 19Jun 13 to Jul 11
Zone 3aMar 17 to Apr 14May 12 to 26Jun 22 to Jul 20
Zone 3bMar 8 to Apr 5May 3 to 17Jul 2 to 30
Zone 4aMar 4 to Apr 1Apr 29 to May 13Jul 6 to Aug 3
Zone 4bFeb 27 to Mar 27Apr 24 to May 8Jul 9 to Aug 6
Zone 5aFeb 22 to Mar 22Apr 19 to May 3Jul 12 to Aug 9
Zone 5bFeb 20 to Mar 20Apr 17 to May 1Jul 18 to Aug 15
Zone 6aFeb 18 to Mar 18Apr 15 to 29Jul 25 to Aug 22
Zone 6bFeb 12 to Mar 12Apr 9 to 23Jul 30 to Aug 27
Zone 7aFeb 5 to Mar 5Apr 2 to 16Aug 2 to 30
Zone 7bJan 25 to Feb 22Mar 22 to Apr 5Aug 9 to Sep 6
Zone 8aJan 18 to Feb 15Mar 15 to 29Aug 15 to Sep 12
Zone 8bJan 6 to Feb 3Mar 3 to 17Aug 21 to Sep 18
Zone 9aDec 22 to Jan 19Feb 16 to Mar 2Sep 3 to Oct 1
Zone 9bNov 22 to Dec 20Jan 17 to 31Sep 16 to Oct 14

Spring dates before the last frost assume the soil has thawed and is dry enough to work. After a late or wet spring, wait for that even if the date has passed.

Where frost is rare

In the Deep South, Florida, the desert Southwest and coastal California, snapdragons are a fall-through-winter flower. Set out transplants once fall weather cools (October-November). They bloom through winter and into spring, then decline in late spring heat, usually by April-May in Florida. Heat rather than day length stops flowering, and no variety is truly heat-tolerant. North Florida plantings may need cover on the coldest nights.

ZonePlanting months in Extension guides
Zone 9Oct-Feb (UF/IFAS FPS-44 lists Oct, Nov, Dec, Jan, Feb; UF North/Central Florida monthly lists include it Oct-Feb; Arizona low desert mid-Sep to early Feb)
Zone 10Nov-Feb (UF/IFAS FPS-44 for zones 10-11; UF South Florida lists include it Nov, Dec and Feb but not Oct)
Zone 11Nov-Feb (UF/IFAS FPS-44 for zones 10-11)

Based on UF/IFAS FPS-44 Antirrhinum majus: Snapdragon (planting months by USDA zone); UF/IFAS Gardening Solutions monthly 'Flowers to Plant' infographics (North/Central/South Florida) and Florida Gardening Calendars ENH1189/1190/1191; UF/IFAS EP549; University of Arizona AZ1100 low-desert guide; Texas A&M AgriLife Bexar County. No University of Hawaii CTAHR snapdragon guidance was found. Warm-winter areas are matched to zones approximately, so use the months for your region.

How to grow snapdragonsYour full planting calendar

Sources