Snapdragon

Antirrhinum majus

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verifiedReviewed by the GreenScout Team

Snapdragons are tall, dramatic flowering plants with spiky blooms in vibrant colors that open and close like a dragon's mouth when gently squeezed. They bloom prolifically from spring through fall and are excellent for cutting gardens and borders. These cool-season lovers perform best in temperate climates and can be grown as annuals or short-lived perennials.

Common Problems

Select the problem your Snapdragon is experiencing to get a treatment guide.

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Leggy Growthchevron_right

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Wiltingchevron_right

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Yellow Leaveschevron_right

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Care Guide

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Light

Full sun to partial shade; 6+ hours of direct sunlight daily for best blooming

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Water

Keep soil consistently moist but not waterlogged; water at the base to prevent fungal issues

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Soil

Well-draining, fertile soil with pH 6.0–7.5; amend with compost before planting

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Fertiliser

Feed every 2–3 weeks with balanced fertilizer; reduce nitrogen to encourage flowering

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Temperature

Prefer cool conditions (60–75°F); heat stress causes early flowering and decline

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Humidity

Moderate humidity; ensure good air circulation to prevent fungal diseases

Toxicity

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Generally non-toxic; however, seeds in large quantities may cause mild digestive upset

Common Diseases

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Common Pests

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Seasonal Care

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Resume regular watering and feeding as growth picks up.

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Peak growing season. Water and feed regularly.

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Reduce watering as growth slows. Stop heavy feeding.

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Minimal watering and feeding. Protect from frost if needed.

Frequently Asked Questions

Why is it called a Snapdragon?

Its spiky blooms open and close like a dragon's mouth when gently squeezed at the sides, which is exactly how the plant earned its playful common name.

Why did my Snapdragon stop blooming in summer heat?

It's a cool-season lover that prefers 60–75°F, and heat stress causes early flowering decline — blooming typically slows or stops once summer heat sets in.