Antirrhinum majus 'Rocket'
Antirrhinum majus ‘Rocket’ is a tall F1 series of garden snapdragons for beds and cutting. It stands out for long, uniform spikes and reliable performance under long days. Plants suit cool spring and fall conditions in most of North America. They can flower through early summer where nights are cool. Stems are strong enough for bouquets when cut at one third open. This series is commonly listed for heat tolerance by the breeder.
At‑a‑glance
- Group/Class: F1 series; Group 3-4; tall cut-flower type
- Height × spread: 30-36 in (76-91 cm) × 16-18 in (41-46 cm)
- Bloom window: late spring to summer; fall again where cool
- Color & flower form: mix; classic snapdragon spires
- Fragrance: 1 trace
- USDA hardiness: grown as annual in most of North America; short-lived perennial in zones 7-10
- Breeder / Year / Origin: PanAmerican Seed, unknown, USA
- Awards/registration: All-America Selections winners exist for select colors
- Cut-flower notes: long, straight stems; typical vase life 7-10 days
- Pet safety: safe
How it differs
- Taller than bedding strains such as ‘Sonnet’ and ‘Liberty’.
- Main-season type for long days and warmer conditions.
- Spikes are closely set for a fuller look in the vase.
- Commonly marketed as heat tolerant for summer production.
Strengths
- Uniform height and timing across colors.
- Long stems for bouquets and arrangements.
- Performs under long days in late spring and summer.
- Reblooms with timely deadheading.
Care in one minute
- Site: full sun with afternoon airflow.
- Soil and pH: well-drained, moderately fertile soil; sources differ on pH guidance from near neutral in gardens to 5.5-5.8 in production.
- Water: keep evenly moist; avoid prolonged overhead watering.
- Feeding: light, regular feeding with low-ammonium fertilizer.
- Pinch and support: pinch once after establishment; stake or net for straight stems; deadhead spent spikes.
- Overwintering: may overwinter with mulch in zones 7 to 10.
Watch‑outs
- Tall stems can lean without support in windy sites.
- Susceptible to rust and botrytis in wet periods.
- Flowering can slow in extreme summer heat.
Best uses (tags)
- cutting
- borders
- back of bed
- pollinators
Provenance note
An F1 series marketed by PanAmerican Seed as a Group 3 to 4 snapdragon that flowers well under long days for garden color and cutting.
References
- PanAmerican Seed – Rocket GrowerFacts
- PanAmerican Seed – Rocket Mixture page
- NC State Extension Plant Toolbox – Antirrhinum majus
- Cornell High Tunnels – Snapdragon
- ASPCA – Common Snapdragon (non-toxic)
Written by: Your Flowers Guide editorial team
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