Plantaginaceae
Summer Snapdragon (Angelonia angustifolia)
Angelonia angustifolia
Give summer snapdragon full sun and well-draining, fertile soil. Water when the top inch of soil dries out and avoid soggy conditions, which quickly lead to root rot. It is heat and drought tolerant once established, self-cleaning (no deadheading needed), and only needs light monthly feeding to keep blooming from summer into fall.
Every 4 days
Direct sun
18° - 35°C
% - %
Categories
What is Summer Snapdragon?
Summer Snapdragon (Angelonia angustifolia) is a easy-care plant from the Plantaginaceae family. Angelonia angustifolia, commonly called summer snapdragon, is a heat-loving herbaceous perennial in the Plantaginaceae family, native to Mexico, the West Indies and parts of Central and South America. Grown as a warm-season bedding plant across much of the world, it produces upright spikes of small,...
Summer Snapdragon grows up to 60cm, spread of 45cm, watering every 4 days, 18°C – 35°C. It is not suitable for indoor environments and safe for pets.
Unlike many tropical plants, Summer Snapdragon tolerates watering mistakes. Best for beginners. Unlike many popular species, Summer Snapdragon is safe to keep around pets.
How to Care for Summer Snapdragon?
TLDR: Summer Snapdragon needs Direct sun, watering every 4 days, and temperatures between 18-35°C with 40-70% humidity.
How Often Should You Water Summer Snapdragon?
Water deeply when the top 2-3 cm (about 1 inch) of soil feels dry, then let it drain completely. In containers during hot weather check moisture every 1-2 days; in garden beds, established plants tolerate short dry spells. Never let the plant sit in waterlogged soil.
How Much Light Does Summer Snapdragon Need?
Provide at least 6-8 hours of direct sun daily. Indoors, place within 30 cm (1 foot) of a bright, sunny window; outdoors, full sun produces the densest flower spikes.
What Is the Best Soil for Summer Snapdragon?
Use a rich, well-draining soil with a slightly acidic pH between 5.5 and 6.2. Amend heavy or clay soil with compost, and ensure containers have drainage holes to prevent standing water.
What Pot Should You Use for Summer Snapdragon?
Use a well-draining plastic or terracotta container with ample drainage holes; terracotta helps wick away excess moisture, reducing root rot risk.
Care Schedule
Fertilize
Every 30 days
What Is Summer Snapdragon and Where Does It Come From?
Angelonia angustifolia, commonly called summer snapdragon, is a heat-loving herbaceous perennial in the Plantaginaceae family, native to Mexico, the West Indies and parts of Central and South America. Grown as a warm-season bedding plant across much of the world, it produces upright spikes of small, two-lipped flowers in white, pink, purple, blue and bicolor shades from early summer through fall, above narrow, slightly aromatic lance-shaped leaves.
How to Propagate Summer Snapdragon?
Stem cutting
Use clean, sharp tools and keep the soil moist but never soggy; roots typically form within 2-3 weeks.
- 1 Cut a healthy 10 cm (4 in) stem section with several leaf nodes, just below a node.
- 2 Remove the leaves from the lower half of the cutting.
- 3 Dip the cut end in rooting hormone powder.
- 4 Insert the cutting into moist potting soil and keep it consistently moist.
- 5 Mist regularly and keep in bright, indirect light until roots form.
Materials needed:
Seed
Seeds need light to germinate, so press them lightly into the surface rather than burying them.
- 1 Collect dry, brown seed pods after flowers fade.
- 2 Sow seeds on the surface of moist growing medium, without covering them (they need light to germinate).
- 3 Keep the medium consistently moist at 21-24C (70-75F).
- 4 Thin seedlings once they develop true leaves.
Materials needed:
How Big Does Summer Snapdragon Grow?
TLDR: Summer Snapdragon can reach up to 60cm tall with Fast growth rate.
Max height
60cm
Spread
45cm
Growth rate
Fast
Foliage
Evergreen
Plant Uses
Ornamental
Great for decoration
Is your plant showing symptoms?
Click on the symptom to discover possible causes:
What Diseases Commonly Affect Summer Snapdragon?
TLDR: Summer Snapdragon is susceptible to 6 known diseases. Monitor regularly for early detection.
Powdery Mildew
Powdery mildew is a common fungal disease caused by various fungi species including Erysiphe, Podosphaera, Oïdium, and Leveillula. It affects over 10,000 plant species worldwide. The disease thrives in warm, dry climates with high humidity and appears as a distinctive white powdery coating on plant surfaces.
Aphids
Aphids are small, soft-bodied, pear-shaped insects (1/16 to 1/8 inch long) that feed by sucking nutrient-rich sap from plants. They reproduce rapidly and can quickly weaken plants, causing distorted growth and transmitting plant viruses. Aphids come in various colors including green, black, red, yellow, brown, and gray. They secrete honeydew, a sticky substance that attracts ants and encourages sooty mold growth.
Phytophthora Root Rot
Disease caused by fungus-like organisms (oomycetes) that live in soil and can survive for years. It affects roots, stem, and crown of plants, being especially severe in waterlogged or poorly drained soils. It is the second most common cause of root rot in trees and shrubs.
Root Rot
Root rot is a serious fungal disease that affects the root system of plants, causing them to decay and die. It is primarily caused by overwatering, poor drainage, or soil-borne fungi such as Pythium, Phytophthora, Rhizoctonia, and Fusarium. The disease thrives in waterlogged conditions where roots are deprived of oxygen, making them susceptible to fungal infection.
Fun Facts
Its two-lipped flowers resemble tiny snapdragons, earning it the common name summer snapdragon, though it is not a true snapdragon.
The narrow leaves are slightly aromatic when crushed.
Unlike most summer annuals, it keeps blooming strongly even above 30C (85F), when many other flowers fade.
It is self-cleaning, dropping spent blooms on its own without needing deadheading.
Frequently asked questions
Is summer snapdragon toxic to cats or dogs?
How often should I water Angelonia angustifolia?
Does summer snapdragon need deadheading?
What is the best way to propagate Angelonia?
Compare with similar plants
| Attribute | Difficulty | Light | Watering | Pet Safe |
|---|---|---|---|---|
| Field Maple | Easy | Bright indirect | 14d | ✓ |
| Silver Birch | Easy | Direct sun | 14d | ✓ |
| Common Blanketflower | Easy | Direct sun | 10d | ✓ |
| Cushion Bush | Easy | Direct sun | 14d | ✓ |
Choose & Compare
Sources & References
- Angelonia angustifolia - NC State Extension Gardener Plant Toolbox
- Angelonia angustifolia - Missouri Botanical Garden Plant Finder
- Angelonia: How to Grow and Care with Success - Gardenia.net
- Toxic and Non-Toxic Plant List - Cats | ASPCA
- How to Propagate Angelonia Plant - Live to Plant
- Angelonia angustifolia (Summer Snapdragon): Complete Growing and Care Guide
- Angelonia Plant Care: How to Grow Summer Snapdragon - Garden Design
