Angelonia (summer snapdragon) Angelonia angustifolia
Angelonia (summer snapdragon) (Angelonia angustifolia) is an annual flowering plant in the Plantaginaceae family, native to Mexico, the Caribbean and northern South America. It grows 30–60 cm (12–24 in) tall and 25–40 cm (10–16 in) wide, wants full sun and moderate water, and is hardy to about 5 °C (41 °F). Space plants about 30 cm (12 in) apart.
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Angelonia (summer snapdragon) at a glance
| Type | Annual flowering plant |
|---|---|
| Family | Plantaginaceae |
| Mature height | 30–60 cm (12–24 in) |
| Mature spread | 25–40 cm (10–16 in) |
| Spacing | 30 cm (12 in) centre to centre |
| Sun | Full sun, at least 6 h of direct sun a day |
| Water | Moderate; drought tolerance moderate, waterlogging tolerance none |
| Soil pH | 5.5–7 |
| Cold hardiness | About 5 °C (41 °F) once established (roughly USDA zone 11) |
| Heat stress | Likely above about 40 °C (104 °F) |
| Flowering | about 9–11 weeks after planting, for 13–21 weeks |
| Days to maturity | About 100 days from planting |
| Wind tolerance | Low |
| Pollinator value | Moderate |
| Edible | Not grown as food |
| Native to | Mexico, the Caribbean and northern South America |
| Common in gardens of | 🇲🇽 Mexico, 🇺🇸 United States, 🇧🇷 Brazil, 🇹🇭 Thailand, 🇸🇬 Singapore |
Is Angelonia (summer snapdragon) toxic?
- People: not known to be toxic
- Cats: not known to be toxic
- Dogs: not known to be toxic
Listed as non-toxic to cats and dogs by the ASPCA.
If a child or pet may have eaten part of a plant, call a poison centre or vet straight away.
Companion planting: what to grow with Angelonia (summer snapdragon)
No well-documented helpful pairing. Group it with plants that like full sun and moderate water.
Questions about Angelonia (summer snapdragon)
- How far apart should I plant Angelonia (summer snapdragon)?
- About 30 cm (12 in) apart, centre to centre. A mature plant spreads 25–40 cm (10–16 in).
- Does Angelonia (summer snapdragon) need full sun?
- Full sun: at least 6 hours of direct sun a day.
- How much water does Angelonia (summer snapdragon) need?
- Moderate water. Drought tolerance is moderate and waterlogging tolerance none.
- How cold-hardy is Angelonia (summer snapdragon)?
- It tolerates about 5 °C (41 °F) once established, roughly USDA zone 11. As an annual it is usually planted out after the last frost.
- When does Angelonia (summer snapdragon) flower?
- About 9–11 weeks after planting, for 13–21 weeks.
- Is Angelonia (summer snapdragon) poisonous to cats and dogs?
- For cats it is not known to be toxic; for dogs not known to be toxic; for people not known to be toxic. Listed as non-toxic to cats and dogs by the ASPCA.
- What grows well with Angelonia (summer snapdragon)?
- There is no well-documented companion pairing for Angelonia (summer snapdragon). Group it with plants that like the same sun (full sun) and water (moderate).
Sources and evidence
Evidence grade B (B: extension service or peer-reviewed).
- Extension Gardener Plant Toolbox, NC State Extension
- UF/IFAS Extension tropical and subtropical fruit and landscape publications, University of Florida
Notes and assumptions
- Heat-proof spikes of purple, pink or white flowers all summer; grape-scented foliage. A perennial in the tropics.
Reference values for planning, not horticultural, veterinary or medical advice. Varieties, soils and local climates differ: check with a local nursery or extension service.
Related plants
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- Hebe Veronica speciosa
- Fairy foxglove Erinus alpinus
- Parry's penstemon Penstemon parryi
- Rice paddy herb (ngò om) Limnophila aromatica
- Spiked speedwell Veronica spicata