When to Plant Snapdragon in USDA Zone 10a
June in Zone 10a — your action list
June rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in Zone 10a.
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Collect snapdragon at their peak
This is the payoff month. Bring a basket, bring a friend, and get into the beds.
A few tasks this June that'll pay off in July
- First harvests: snapdragon
Snapdragons (Antirrhinum majus) are classic cool-season annuals whose upright spikes of dragon-lipped flowers are among spring's most dramatic displays. Tolerating light frosts, they bloom from early spring until summer heat shuts them down — then often revive in fall. In zones 9-11 they are grown as fall-planted winter annuals and may re-seed to naturalize.
In Zone 10a, the average last spring frost is around January 1 and the first fall frost is around December 31, giving you a growing season of approximately 364 days.
Snapdragon Planting Timeline — Zone 10a
Where Is USDA Zone 10a?
The map below highlights the states that contain Zone 10a. Click any state to see the Snapdragon planting schedule for that location.
Snapdragon Planting Calendar — Zone 10a
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | November 20 | Nov 20 – Dec 4 |
| Direct Sow | October 23 | Oct 23 – Nov 13 |
| Bloom | January 22 | Jan 22 – Jun 18 |
| Fall Sowing | September 24 | Sep 24 – Oct 8 |
· 9" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Bloom |
| February | Bloom |
| March | Bloom |
| April | Bloom |
| May | Bloom |
| June | Bloom |
| July | — |
| August | — |
| September | Fall Sowing |
| October | Direct Sow Fall Sowing |
| November | Transplant Outdoors Direct Sow |
| December | Transplant Outdoors |
Free Zone 10a Planting Calendar PDF
Know exactly when to plant every crop in your zone. Get a printable month-by-month calendar customized for Zone 10a with start dates, transplant windows, and harvest times.
Growing Conditions
Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
Days to Maturity
70–100 days
Soil pH
6.2 – 7
Zone Temperature Range
30°F to 35°F average annual minimum
Growing Season
365 days (Zone 10a average)
Planting Specifications
| Plant Spacing | 9 inches apart |
| Row Spacing | 12 inches between rows |
Succession Planting Snapdragon in Zone 10a
Sow every 8 weeks for continuous harvest throughout the season.
Growing Tips for Snapdragon in Zone 10a
Zone 10a offers a long growing season (~365 days). You can plant Snapdragon earlier and may get multiple harvests.
Start indoors 10-12 weeks before last frost; seeds need light to germinate — press into moist medium and do not cover. Transplant after hardening off, even if light frosts remain. Pinch seedlings once to encourage branching. Deadhead to prolong blooming. In zones 8-11, sow in fall for a winter-to-spring show. Tall varieties (24-36") make excellent cut flowers.
Companion Planting
Good Companions
The Gardener's Encyclopedia to Companion Planting
The pairings that make vegetables, herbs, and flowers grow better — and the ones that quietly wreck a bed.
- Proven pairings for 200+ vegetables, herbs, flowers, and fruits
- Full seed-starting + planting schedule with timing and spacing
- Bonus: square-foot gardening guide + printable seasonal planners
Saving Snapdragon Seeds
Recommended for Your Garden
Reduce heat stress and sun scorch in hot climates with UV-stabilized shade cloth.
Start seeds indoors with reusable cell trays and humidity domes.
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Related Plants
Snapdragon in Other Zones
Snapdragon by State
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
Frequently Asked Questions
When should I plant Snapdragon in Zone 10a?
In Zone 10a, plan your Snapdragon planting around the average last frost date of January 1. Direct sow outdoors around October 23. Transplant seedlings around November 20.
Can Snapdragon grow in Zone 10a?
Yes, Snapdragon can grow well in Zone 10a, hardy in USDA zones 2a through 11b. Zone 10a has a growing season of approximately 364 days, which is sufficient for Snapdragon (70-100 days to maturity).
When can I harvest Snapdragon in Zone 10a?
In Zone 10a, expect to harvest Snapdragon from January 22 – June 18. Snapdragon takes 70-100 days from planting to harvest.
What is the last frost date for Zone 10a?
The average last spring frost in Zone 10a is around January 1, and the first fall frost is around December 31. This gives a growing season of approximately 364 days. These are 50% probability dates — actual frost dates vary year to year.
What should I plant next to Snapdragon?
Good companion plants for Snapdragon include Lettuce, Carrots, Sweet Alyssum, Lobelia. These companions can help with pest control, pollination, and nutrient sharing.
Your Zone 10a Garden Planner — Free
A 22-page printable planner tailored to Zone 10a. Planting dates, monthly task lists, harvest log, seed inventory, and succession charts — everything you need to plan a full season.