When to Plant Gladiolus in District of Columbia
Plant Bulbs Outdoors
Saturday, March 27, 2027
State
District of Columbia
USDA Zones
7a, 7b, 8a
Avg Last Frost
Saturday, March 20, 2027
Cities Covered
2
District of Columbia Planting Schedule by Zone
District of Columbia spans 3 zones — find yours below for the most accurate dates.
| Zone | Last Frost | Plant Bulbs |
|---|---|---|
| 7a | Saturday, April 10, 2027 | Saturday, April 17, 2027 |
| 7b | Monday, April 5, 2027 | Monday, April 12, 2027 |
| 8a | Saturday, March 20, 2027 | Saturday, March 27, 2027 |
Dates based on average last frost. Check your local forecast before planting.
About Gladiolus
Growing Gladiolus in District of Columbia: Complete Guide
Gladiolus (Gladiolus × hortulanus) is planted as dormant bulbs. Depending on your zone, the right window in District of Columbia falls between March 27, 2027 (Zone 8a) and April 17, 2027 (Zone 7a).
Because District of Columbia stretches across 3 USDA hardiness zones (7a, 7b, 8a), planting windows can shift by as much as two to four weeks from one end of the state to the other. Gardeners in the warmer southern zones can start earlier, while those in cooler northern zones should wait until the zone table above shows their last frost has passed.
With 80 days to maturity, Gladiolus fits comfortably within District of Columbia's growing season in most zones. In the warmest parts of the state, a second planting later in the season may be possible.
Gladiolus requires full sun (6+ hours) and regular (1 inch/week) moisture. Check your local forecast for humidity and heat advisories that may affect timing and pest pressure.
For the most precise planting dates tailored to your exact location, enter your ZIP code on our planting calendar or use the zone table above to find the schedule for your area of District of Columbia.
Frequently Asked Questions
When should I plant Gladiolus in District of Columbia?
In District of Columbia, plant Gladiolus bulbs outdoors around Saturday, March 27, 2027. District of Columbia spans zones 7a–8a, so gardeners in warmer zones can plant earlier.
What is the last frost date in District of Columbia?
District of Columbia spans 3 USDA zones (7a, 7b, 8a), so last frost dates vary by region. Washington (7a) sees frost until around Saturday, April 10, 2027, while Washington, Washington Navy Yard (8a) is frost-free much earlier.
How long does Gladiolus take to grow in District of Columbia?
Gladiolus takes about 80 days from planting to bloom. In District of Columbia's longer-season zones, a second planting in late summer may be possible.
What USDA zones does District of Columbia cover for Gladiolus?
District of Columbia includes zones 7a, 7b, 8a. Gladiolus grows well across all of these zones with adjusted timing — use the zone table above to find the right dates for your part of the state.
When to Plant Gladiolus by City in District of Columbia
Dates are based on each city's USDA zone and average last frost.
| City | Zone | Last Frost | Plant Bulbs |
|---|---|---|---|
| Washington | 8a | Saturday, March 20, 2027 | Saturday, March 27, 2027 |
| Washington Navy Yard | 8a | Saturday, March 20, 2027 | Saturday, March 27, 2027 |