When to plant Calendula in Apache County, AZ
Plant Calendula in Apache County, between April 22 and May 13 — the only viable window. Zone 6b's short season (143 frost-free days) rules out a fall crop.
When to Plant Calendula in Apache County, AZ
Your July gardening checklist
Your Apache County, Arizona garden is entering a new phase. Here's what's on the schedule for July and why each task matters now.
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Begin indoor sowing: calendula
Starting these indoors now means sturdy transplants ready the moment your soil warms up.
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Basket week: calendula
This is the payoff month. Bring a basket, bring a friend, and get into the beds.
August will be here before you know it — start on
- 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.
Apache County, Arizona is in USDA Zone 6b. The average last spring frost is May 20 and the first fall frost is October 10, giving you a growing season of approximately 143 days.
At an elevation of 7,720 feet, Apache County receives approximately 9.4 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 92°F, providing good warmth for Calendula during the growing season. 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.
Apache County Soil Profile
Soil Type
Sandy Loam
Soil pH
7.2-8.7
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 Apache County
How your county's soil matches Calendula's growing requirements.
Soil pH
Your soil pH (7.2–8.7) is more alkaline than Calendula prefers (5.5–7.0). Add sulfur or peat moss to lower pH.
Soil Texture
Sandy soil in Apache 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
Succession Planting Calendula
Sow every 5.7 weeks. Last sowing by Aug 01 to harvest before frost.
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 | — | 0.7" | 0" | ❄️ Dormant |
| Feb | — | 0.5" | 0" | ❄️ Dormant |
| Mar | — | 0.6" | 0" | ❄️ Dormant |
| Apr | — | 0.3" | 0" | ❄️ Dormant |
| May | 2.2" | 0.2" | 2" | 🚿 Regular watering |
| Jun | 2.2" | 0.3" | 1.9" | 🚿 Regular watering |
| Jul | 2.2" | 1.7" | 0.5" | 💧 Light watering |
| Aug | 2.2" | 2" | 0.2" | 💧 Light watering |
| Sep | 2.2" | 1.2" | 1" | 💧 Light watering |
| Oct | 2.2" | 0.8" | 1.4" | 🚿 Regular watering |
| Nov | — | 0.6" | 0" | ❄️ Dormant |
| Dec | — | 0.6" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Oct in Apache 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 — Apache County, AZ
Calendula Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | April 8 | Apr 8 – Apr 22 |
| Transplant Outdoors | May 20 | May 20 – Jun 3 |
| Direct Sow | April 22 | Apr 22 – May 13 |
| Bloom | July 8 | Jul 8 – Oct 14 |
Plant 0.3" deep · 9" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Start Indoors Direct Sow |
| May | Transplant Outdoors Direct Sow |
| June | Transplant Outdoors |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | Bloom |
| 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 6b
📆 Growing Season
143 days in Apache County
Growing Tips for Calendula in Apache County
Direct sow Calendula outdoors after May 20 in Apache County when soil has warmed and frost danger has passed.
Sandy soil in Apache County dries quickly — mulch Calendula with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
Common pests for Calendula in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.
Apache County receives only 9" 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 Apache County, AZ?
Apache County is in Zone 6b with an average last frost of May 20. Plan your Calendula planting based on this frost date — see the calendar above for exact timing.
What planting zone is Apache County, AZ?
Apache County, Arizona is in USDA Hardiness Zone 6b. The average last spring frost is May 20 and first fall frost is October 10.
When should I plant Calendula in Apache County, AZ?
In Apache County, AZ, plant Calendula after the last frost (around May 20) and before the first frost (around October 10). Best results when soil holds above 50°F.
What growing zone is Apache County, AZ for Calendula?
Apache County sits in USDA Zone 6b. Calendula grows reliably in zones 2a through 11b, so it's a good fit here.
Can Calendula grow in Apache County's climate?
Yes — Calendula grows well in Apache County's temperate climate. Apache County averages a 143-day frost-free season, with last frost around May 20 and first frost around October 10.
Your Apache County Garden Planner — Free
A 22-page printable planner built for Apache County (Zone 6b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.