Angelonia (Summer Snapdragon) in Zone 3a & 3b

Angelonia angustifolia

Yes, angelonia (summer snapdragon) grows in zones 3a and 3b. Start seeds indoors Apr 11–Apr 18 and plant out Jun 13–Jun 20.

When to plant angelonia (summer snapdragon) in zone 3b

Zones 3a and 3b share the same average frost dates, so this page covers both.

Method: Start indoors: Start indoors from seed, then transplant outside. It needs a head start most zones can't give it by direct-sowing alone.

Start indoors	Apr 11–Apr 18
Direct sow / transplant outside	Jun 13–Jun 20
Estimated bloom	Sep 19–Sep 26 (~98 days after transplanting)

Spacing: 2 per square foot (square-foot-gardening spacing). Mature height: 1-2 ft.

Full angelonia (summer snapdragon) profile · Companion planting guide · Zone 3b planting calendar

Plant alongside it in zone 3b

These go outside within two weeks of angelonia (summer snapdragon) in zone 3b, so one planting day can cover them.

NasturtiumJun 6–Jun 13
MarigoldJun 6–Jun 13
Black-Eyed Susan VineJun 13–Jun 20
Cleome (Spider Flower)Jun 13–Jun 20
ColeusJun 13–Jun 20
DahliaJun 13–Jun 20

Angelonia (summer snapdragon) is a tender perennial in zones 9b-11, but almost everywhere else it's grown as a heat-loving annual, and it's specifically called out by Growing In The Garden as a strong choice for low-desert summer heat. Upright 1- to 2-foot stems carry small spurred spikes of orchid-like blooms in purple, white, or pink.

How angelonia (summer snapdragon) fits zone 3's season

Zone 3b's frost-free window runs about 98 days, from May 30 to September 5. Angelonia (summer snapdragon) needs about 98 days from transplant to first bloom.

Angelonia (Summer Snapdragon) planting windows in every zone

Zone 3b is highlighted. Useful for comparing against a neighbouring zone, or for a garden somewhere else.

Zone	Start indoors	Sow or plant out	Bloom
2a & 2b	Apr 1–Apr 8	Jun 3–Jun 10	Sep 9–Sep 16
3a & 3b (your zone)	Apr 11–Apr 18	Jun 13–Jun 20	Sep 19–Sep 26
4a & 4b	Mar 27–Apr 3	May 29–Jun 5	Sep 4–Sep 11
5a & 5b	Mar 22–Mar 29	May 24–May 31	Aug 30–Sep 6
6a & 6b	Mar 7–Mar 14	May 9–May 16	Aug 15–Aug 22
7a & 7b	Feb 20–Feb 27	Apr 24–May 1	Jul 31–Aug 7
8a & 8b	Feb 4–Feb 11	Apr 8–Apr 15	Jul 15–Jul 22
9a & 9b	Dec 28–Jan 4	Mar 1–Mar 8	Jun 7–Jun 14
10a & 10bSpring window	Jan–May	Mar–Jul	~98 days after transplanting
11a & 11b	Nov 13–Nov 20	Jan 15–Jan 22	Apr 23–Apr 30

Bloom dates are about 98 days after the sow or plant-out date, not after starting seeds indoors.

Zone 2 sows before zone 3 here, which looks wrong and is not. USDA zones rank winter cold, not season length, and zone 2 is mostly interior Alaska, where hard winters come with warm summers. More on what a zone measures.

Good companions

No well-established companions for angelonia (summer snapdragon).

Where to buy angelonia seeds

True Leaf Market (each supplier's angelonia seeds)

Varieties we recommend, and where to get them:

Serena series: Named a Louisiana Super Plant for 2019 by the LSU AgCenter, one of the few angelonia series that can be grown from seed rather than requiring cuttings, which is why it's the option worth looking for by name at seed racks. Buy: True Leaf Market Full notes

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See it growing

Search YouTube for "growing angelonia (summer snapdragon)" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)

← Back to the full zone 3b calendar · Plan your beds in the Garden Designer →

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Growing Angelonia (Summer Snapdragon) in USDA zone 3b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.

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