When to plant Gladiolus in Benton County, IN
In Zone 6a (Benton County), direct-sow Gladiolus between April 22 and May 13 for spring, after the April 22 last-frost mark.
When to Plant Gladiolus in Benton County, IN
Gladiolus (Gladiolus spp.) produce tall, stately spikes of trumpet-shaped blooms in a rich array of colors, making them one of the most popular cut flowers in the world. Each spike carries 12–20 florets that open in succession from bottom to top over 7–10 days. By planting corms every two weeks from last frost through early summer, gardeners create a continuous succession of fresh blooms from midsummer through fall. Corms multiply each season — a single planting becomes a growing collection over the years. Ideal for back-of- border planting, cutting gardens, and mixed summer containers.
Benton County, Indiana is in USDA Zone 6a. The average last spring frost is April 22 and the first fall frost is October 13, giving you a growing season of approximately 174 days.
At an elevation of 1,298 feet, Benton County receives approximately 39 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83°F, so choose short-season varieties of Gladiolus to ensure they mature before fall.
Benton County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Gladiolus Planting Timeline — Benton County, IN
Gladiolus Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | April 22 | Apr 22 – May 6 |
| Direct Sow | April 22 | Apr 22 – May 13 |
| Bloom | July 8 | Jul 8 – Oct 21 |
Plant 5" deep · 5" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Transplant Outdoors Direct Sow |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | Bloom |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
📅 Days to Maturity
70–100 days
🧪 Soil pH
Needs 6–6.5 · Your soil: N/A
🗺️ USDA Zone
Zone 6a
📆 Growing Season
174 days in Benton County
Growing Tips for Benton County
Plant corms 4–6 inches deep, pointed end up, as soon as soil reaches 60°F after last frost. Space 4–6 inches apart; rows 12 inches apart. Stake or grow through a support grid — tall varieties reach 4–5 feet and tip in wind. Begin succession plantings every 2 weeks through early July for continuous bloom. Water deeply once a week; mulch to conserve moisture and suppress weeds. Cut spikes for vases when the lowest floret just begins to open. After first killing frost (in cold zones), dig corms, let dry for 3–4 weeks in a ventilated spot, remove cormels, and store in mesh bags at 35–50°F. In zones 7b–8a, corms sometimes survive mild winters in ground with heavy mulch; in zones 8b+, in-ground overwintering is reliable.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Gladiolus in Other Locations
Frequently Asked Questions
When should I plant Gladiolus in Benton County, IN?
Benton County is in Zone 6a with an average last frost of April 22. Plan your Gladiolus planting based on this frost date — see the calendar above for exact timing.
What planting zone is Benton County, IN?
Benton County, Indiana is in USDA Hardiness Zone 6a. The average last spring frost is April 22 and first fall frost is October 13.
When should I plant Gladiolus in Benton County, IN?
In Benton County, IN, plant Gladiolus after the last frost (around April 22) and before the first frost (around October 13). Best results when soil holds above 50°F.
What growing zone is Benton County, IN for Gladiolus?
Benton County sits in USDA Zone 6a. Gladiolus grows reliably in zones 3a through 10b, so it's a good fit here.
Can Gladiolus grow in Benton County's climate?
Yes — Gladiolus grows well in Benton County's temperate climate. Benton County averages a 174-day frost-free season, with last frost around April 22 and first frost around October 13.
Your Benton County Garden Planner — Free
A 22-page printable planner built for Benton County (Zone 6a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.