When to plant Celosia in Tama County, IA
The best window to plant Celosia in Tama County, is May 12–June 2, when soil warms to 50°F. Last frost typically hits April 28; first frost October 8.
When to Plant Celosia in Tama County, IA
Top priorities for Tama County, Iowa gardeners in July
We've pulled the most time-sensitive tasks for Tama County, Iowa this July and put them front and centre. Tackle them in order.
-
Harvest celosia as they ripen
The more you pick, the more the plant produces. Letting fruit overripen tells the plant it's time to stop.
Get ahead of August
- First harvests: celosia
Celosia (Celosia argentea) encompasses the vivid cockscomb (cristata) and feathery plumed (plumosa) types that explode with color in summer heat. Drought-tolerant and disease-resistant, they thrive in the hottest parts of the season and produce long-lasting blooms both in the garden and as cut or dried flowers. A reliable filler in sunny annual beds.
Tama County, Iowa is in USDA Zone 5a. The average last spring frost is April 28 and the first fall frost is October 8, giving you a growing season of approximately 163 days.
At an elevation of 1,268 feet, Tama County receives approximately 38.7 inches of rainfall annually with predominantly silt loam soil. Summer highs average 85°F, providing good warmth for Celosia during the growing season.
Tama County Soil Profile
Soil Type
Silt Loam
Soil pH
5.8-6.9
Drainage
Well Drained
Celosia Planting Risk Windows
Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.
Soil Compatibility in Tama County
How your county's soil matches Celosia's growing requirements.
Soil pH
Your soil pH (5.8–6.9) overlaps with Celosia's range (6.0–7.0), though not a perfect match.
Soil Texture
The silt loam soil in Tama County is excellent for Celosia — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Celosia.
Organic Matter
Organic matter is excellent (5.1%) — Celosia will thrive.
How to Plant Celosia
Succession Planting Celosia
Sow every 6.9 weeks. Last sowing by Jul 10 to harvest before frost.
Celosia Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Celosia
Celosia needs approximately 0.5 inches of water per week (2.2" per month). Here's how your county's rainfall compares month by month.
| Month | Celosia Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.4" | 0" | ❄️ Dormant |
| Feb | — | 1.7" | 0" | ❄️ Dormant |
| Mar | — | 2.9" | 0" | ❄️ Dormant |
| Apr | 2.2" | 3.2" | 0" | ✅ Rainfall sufficient |
| May | 2.2" | 4.6" | 0" | ✅ Rainfall sufficient |
| Jun | 2.2" | 5.1" | 0" | ✅ Rainfall sufficient |
| Jul | 2.2" | 4.1" | 0" | ✅ Rainfall sufficient |
| Aug | 2.2" | 3.9" | 0" | ✅ Rainfall sufficient |
| Sep | 2.2" | 3.8" | 0" | ✅ Rainfall sufficient |
| Oct | 2.2" | 2.6" | 0" | ✅ Rainfall sufficient |
| Nov | — | 3" | 0" | ❄️ Dormant |
| Dec | — | 2.3" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Tama County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Celosia Heat Requirements (GDD)
What are Growing Degree Days (GDD)?
Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.
Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.
Celosia Planting Timeline — Tama County, IA
Celosia Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 24 | Mar 24 – Apr 7 |
| Transplant Outdoors | May 12 | May 12 – May 26 |
| Direct Sow | May 12 | May 12 – Jun 2 |
| Bloom | July 14 | Jul 14 – Oct 13 |
Plant 0.1" deep · 9" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Start Indoors |
| May | Transplant Outdoors Direct Sow |
| June | Direct Sow |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | Bloom |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.5"/week · Natural rainfall sufficient
📅 Days to Maturity
60–90 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 5a
📆 Growing Season
163 days in Tama County
Growing Tips for Celosia in Tama County
Direct sow Celosia outdoors after April 28 in Tama County when soil has warmed and frost danger has passed.
General growing tips
Start seeds indoors 4–6 weeks before last frost, or direct-sow after soil warms above 60°F. Does not transplant well from large pots — sow in small cells or direct-sow. Needs full sun and warm soil; cold stress causes stunting. Pinch first bloom to encourage branching. Water at the base; wet foliage encourages fungal issues. Excellent dried flower — harvest before seeds set for the best color retention.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Celosia in Other Locations
Frequently Asked Questions
When should I plant Celosia in Tama County, IA?
Tama County is in Zone 5a with an average last frost of April 28. Plan your Celosia planting based on this frost date — see the calendar above for exact timing.
What planting zone is Tama County, IA?
Tama County, Iowa is in USDA Hardiness Zone 5a. The average last spring frost is April 28 and first fall frost is October 8.
When should I plant Celosia in Tama County, IA?
In Tama County, IA, plant Celosia after the last frost (around April 28) and before the first frost (around October 8). Best results when soil holds above 50°F.
What growing zone is Tama County, IA for Celosia?
Tama County sits in USDA Zone 5a. Celosia grows reliably in zones 3a through 11b, so it's a good fit here.
Can Celosia grow in Tama County's climate?
Yes — Celosia grows well in Tama County's temperate climate. Tama County averages a 163-day frost-free season, with last frost around April 28 and first frost around October 8.
Your Tama County Garden Planner — Free
A 22-page printable planner built for Tama 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.