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How to Grow Snapdragon

Reviewed by MyLocalPlanting Editorial Team Updated Sources
Snapdragon (Antirrhinum majus)

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🌿 Plant Overview

Scientific Name Antirrhinum majus
Category flower
Days to Maturity 60 days
Starting Method Start Indoors

☀️ Growing Requirements

☀️

Sun

Full Sun to Partial Shade

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

12" apart

🌱

Depth

0.125" deep

📏

Height

12-36"

🌱

Germination

10-21 days

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🌾 Seed Saving Guide

🟡 Moderate
✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Allow seed pods to dry and turn brown on the spike. Small holes in pods will open when ripe.

Processing

Shake dry pods over a bowl to collect tiny seeds. Dry 1 additional week.

Seed Viability

Up to 3 years when stored cool, dark, and dry.

Pro Tip

Many snapdragons are OP but some are hybrid. Seeds are tiny — handle carefully during collection.

Seed Storage Supplies

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Raised Bed Planting Guides

A 4×8 bed fits 32 plants of Snapdragon. See plant counts, spacing grids, and companion pairings for every bed size →

Snapdragon Planting Calendar by Zone

Snapdragon Planting Calendar by State

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Frequently Asked Questions

When should I plant Snapdragon? +

Start Snapdragon seeds indoors 8 weeks before your last frost date, then transplant outdoors 2 weeks after the last frost. Use the search on this page to find exact dates for your ZIP code or city.

How long does Snapdragon take to grow? +

Snapdragon typically matures in about 60 days from planting. Exact timing varies by variety, soil conditions, and local climate.

Should I start Snapdragon indoors or direct sow? +

Snapdragon should be started indoors 8 weeks before the last frost date. This gives seedlings time to establish before being transplanted outside after frost danger has passed.

How much sun does Snapdragon need? +

Snapdragon requires full sun to partial shade to thrive.

How far apart should I plant Snapdragon? +

Space Snapdragon plants 12 inches apart to allow adequate airflow and root development.

How much water does Snapdragon need? +

Snapdragon has regular (1-2 inches/week) water needs. Consistent moisture is important especially during germination and early growth.

Can you save seeds from Snapdragon? +

Yes — seed saving difficulty for Snapdragon is rated moderate. Allow seed pods to dry and turn brown on the spike. Small holes in pods will open when ripe. Shake dry pods over a bowl to collect tiny seeds. Dry 1 additional week.

How long do Snapdragon seeds last in storage? +

Properly dried and stored Snapdragon seeds remain viable for up to 3 years. Store in a cool, dark, dry location in an airtight container with a silica gel packet for best results.

Are Snapdragon seeds open-pollinated? +

Yes — Snapdragon is open-pollinated, meaning seeds saved from your harvest will grow plants true to the parent variety. This makes it an excellent candidate for building a self-sustaining garden.

About Snapdragon

Classic cool-season annual with vertical spikes in vivid colors. Tolerates light frost. Great cut flower. Blooms spring and fall in warm climates.

Expect your Snapdragon to be ready for harvest in approximately 60 days from planting.

Use the search above or browse by zone or state to find the perfect planting dates for your location.