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Snapdragon growing in a garden
Annual flower

Snapdragon plant profile

Antirrhinum majus

An annual flower for full sun.

Last updated .

When to plant

When to plant Snapdragon

Snapdragons are cool-season and very cold tolerant, so Illinois recommends early-spring and fall planting; in mild-winter areas (USDA zone 9 and up) Clemson plants them in fall for fall and spring bloom. They fade in summer heat.

The calendar shows this cited seasonal window as an approximate band. It does not convert the season into frost-adjusted dates.

Open Snapdragon in my garden calendar

Shows the source-backed planting season, not frost-adjusted dates.

Growing conditions

Sun
Full sun
Lifecycle
Annual

Common problems

Watch for these

Also watch for: needs staking when tall, rust, spent spikes reduce rebloom.

Next steps

Continue with Snapdragon

Evidence trail

Evidence behind this profile

Original extension and institutional publications behind the planting, care, and safety facts on this page.

  1. Snapdragon

    University of Illinois Extension. Supports general reference. Checked 2026-06-13.

  2. Snapdragons for Fall blooms

    Clemson Cooperative Extension, Home & Garden Information Center. Supports general reference. Checked 2026-06-13.

  3. Toxic and Non-Toxic Plants: Garden Snapdragon (Antirrhinum majus) entry

    ASPCA Animal Poison Control Center. Supports pet-safety verdicts for dogs and cats. Checked 2026-07-18.