When to plant Calendula in Mohave County County,
Plant Calendula in Mohave County County from February 1 to February 22 in spring. Mohave County County sits in USDA Zone 9b, with last frost around April 5 and first frost on November 8. A second sowing from August 16 to August 30 extends the harvest into fall.
When to Plant Calendula in Mohave County, AZ
Top priorities for Mohave County, Arizona gardeners in June
Your Mohave County, Arizona garden is entering a new phase. Here's what's on the schedule for June and why each task matters now.
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Bring in the calendula
Taste as you pick. The first ripe produce is the best feedback loop you'll get all season.
Looking ahead to July
- First harvests: calendula
Calendula (Calendula officinalis) is a cheerful, edible-flowered cool-season annual valued by herbalists, chefs, and gardeners alike. Its golden-orange petals are used in salves, teas, and as a saffron substitute. Hardy enough to tolerate light frosts, it blooms prolifically in spring and fall, taking a pause during the hottest weeks of summer.
Mohave County, Arizona is in USDA Zone 9b. The average last spring frost is April 5 and the first fall frost is November 8, giving you a growing season of approximately 217 days.
At an elevation of 3,748 feet, Mohave County receives approximately 8.2 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 96°F, so Calendula may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Calendula will need more frequent watering and organic matter to retain nutrients. With low rainfall, drip irrigation is essential for growing Calendula successfully. Mulch heavily to conserve soil moisture.
Mohave County Soil Profile
Soil Type
Sandy Loam
Soil pH
7.2-8.4
Drainage
Well Drained
Calendula 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 Mohave County
How your county's soil matches Calendula's growing requirements.
Soil pH
Your soil pH (7.2–8.4) is more alkaline than Calendula prefers (5.5–7.0). Add sulfur or peat moss to lower pH.
Soil Texture
Sandy soil in Mohave County warms quickly in spring but drains fast. Calendula will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Calendula.
Organic Matter
Organic matter is low (0.8%). Add 2-3 inches of compost before planting Calendula.
How to Plant Calendula
Fall planting: Sow 12 weeks before your first frost date for a fall harvest.
Succession Planting Calendula
Sow every 5.7 weeks. Last sowing by Aug 30 to harvest before frost.
For a dedicated fall crop, sow by Aug 16.
Calendula Water Budget
Water stress score is 10/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Calendula
Calendula 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 | Calendula Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 0.6" | 0" | ❄️ Dormant |
| Feb | — | 0.4" | 0" | ❄️ Dormant |
| Mar | — | 0.4" | 0" | ❄️ Dormant |
| Apr | 2.2" | 0.3" | 1.9" | 🚿 Regular watering |
| May | 2.2" | 0.2" | 2" | 🚿 Regular watering |
| Jun | 2.2" | 0.3" | 1.9" | 🚿 Regular watering |
| Jul | 2.2" | 1.5" | 0.7" | 💧 Light watering |
| Aug | 2.2" | 1.6" | 0.6" | 💧 Light watering |
| Sep | 2.2" | 1" | 1.2" | 🚿 Regular watering |
| Oct | 2.2" | 0.8" | 1.4" | 🚿 Regular watering |
| Nov | 2.2" | 0.4" | 1.8" | 🚿 Regular watering |
| Dec | — | 0.6" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Nov in Mohave County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Calendula 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.
Calendula Planting Timeline — Mohave County, AZ
Calendula Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | March 1 | Mar 1 – Mar 15 |
| Direct Sow | February 1 | Feb 1 – Feb 22 |
| Bloom | April 12 | Apr 12 – Aug 2 |
| Fall Sowing | August 16 | Aug 16 – Aug 30 |
Plant 0.3" deep · 9" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Direct Sow |
| March | Transplant Outdoors |
| April | Bloom |
| May | Bloom |
| June | Bloom |
| July | Bloom |
| August | Fall Sowing Bloom |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.5"/week · 1-2 times/week
📅 Days to Maturity
50–70 days
🧪 Soil pH
Needs 5.5–7 · Your soil: too_alkaline
🗺️ USDA Zone
Zone 9b
📆 Growing Season
217 days in Mohave County
Growing Tips for Calendula in Mohave County
Direct sow Calendula outdoors after April 05 in Mohave County when soil has warmed and frost danger has passed.
Sandy soil in Mohave County dries quickly — mulch Calendula with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
With summer highs reaching 96°F in Mohave County, provide afternoon shade for Calendula and water deeply in the morning.
Common pests for Calendula in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.
Mohave County receives only 8" of rain annually. Calendula needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.
General growing tips
Direct-sow in early spring as soon as soil can be worked — seeds germinate in cool soil (50-65°F). In zones 7+, also sow in fall for winter/spring bloom. Deadhead consistently to extend bloom. Plants self-seed readily; save a few spent heads and allow them to drop. Harvest petals when flowers are fully open for best flavor and medicinal value.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Calendula in Other Locations
Frequently Asked Questions
When should I plant Calendula in Mohave County, AZ?
Mohave County is in Zone 9b with an average last frost of April 5. Plan your Calendula planting based on this frost date — see the calendar above for exact timing.
What planting zone is Mohave County, AZ?
Mohave County, Arizona is in USDA Hardiness Zone 9b. The average last spring frost is April 5 and first fall frost is November 8.
When should I plant Calendula in Mohave County, ?
In Mohave County, , plant Calendula after the last frost (around April 5) and before the first frost (around November 8). Best results when soil holds above 50°F.
What growing zone is Mohave County, for Calendula?
Mohave County sits in USDA Zone 9b. Calendula grows reliably in zones 2a through 11b, so it's a good fit here.
Can Calendula grow in Mohave County's climate?
Yes — Calendula grows well in Mohave County's temperate climate. Mohave County averages a 217-day frost-free season, with last frost around April 5 and first frost around November 8.
Your Mohave County Garden Planner — Free
A 22-page printable planner built for Mohave County (Zone 9b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.