When to plant Chard in Audubon County, IA
Audubon County sits in USDA Zone 5a. Plant Chard between April 14 (after last frost on April 28) and May 5. A second sowing from July 25 to August 8 extends the harvest into fall.
When to Plant Chard in Audubon County, IA
Swiss chard is a colorful, heat-tolerant green with large crinkled leaves and vibrant stalks in red, yellow, and white. Both the leaves and stems are edible and nutritious.
Audubon County, Iowa is in USDA Zone 5a. The average last spring frost is April 28 and the first fall frost is October 3, giving you a growing season of approximately 158 days.
At an elevation of 1,056 feet, Audubon County receives approximately 32.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 86°F, providing good warmth for Chard during the growing season.
Audubon County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Chard Planting Timeline — Audubon County, IA
Chard Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 24 | Mar 24 – Apr 7 |
| Transplant Outdoors | April 28 | Apr 28 – May 12 |
| Direct Sow | April 14 | Apr 14 – May 5 |
| Harvest | June 23 | Jun 23 – Aug 11 |
| Fall Sowing | July 25 | Jul 25 – Aug 8 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Start Indoors Transplant Outdoors Direct Sow |
| May | Transplant Outdoors Direct Sow |
| June | Harvest |
| July | Fall Sowing Harvest |
| August | Fall Sowing Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
Moderate — regular watering
📅 Days to Maturity
50–60 days
🧪 Soil pH
Needs 6–7 · Your soil: N/A
🗺️ USDA Zone
Zone 5a
📆 Growing Season
158 days in Audubon County
Growing Tips for Audubon County
Direct sow or transplant after last frost. Harvest outer leaves regularly to encourage continuous production. Chard tolerates both heat and light frost.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Chard in Other Locations
Frequently Asked Questions
When should I plant Chard in Audubon County, IA?
Audubon County is in Zone 5a with an average last frost of April 28. Plan your Chard planting based on this frost date — see the calendar above for exact timing.
What planting zone is Audubon County, IA?
Audubon County, Iowa is in USDA Hardiness Zone 5a. The average last spring frost is April 28 and first fall frost is October 3.
When should I plant Chard in Audubon County, IA?
In Audubon County, IA, plant Chard after the last frost (around April 28) and before the first frost (around October 3). Best results when soil holds above 50°F.
What growing zone is Audubon County, IA for Chard?
Audubon County sits in USDA Zone 5a. Chard grows reliably in zones 2a through 11b, so it's a good fit here.
Can Chard grow in Audubon County's climate?
Yes — Chard grows well in Audubon County's temperate climate. Audubon County averages a 158-day frost-free season, with last frost around April 28 and first frost around October 3.
Your Audubon County Garden Planner — Free
A 22-page printable planner built for Audubon County (Zone 5a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.