📍 Roosevelt, AZ · Zone 9b · Last frost Tuesday, February 10, 2026
✏️ ChangeWhen to Plant Spinach in Roosevelt, Arizona (85545)
Location
Roosevelt, Arizona
ZIP Code
85545
USDA Zone
9b
Last Frost
Tuesday, February 10, 2026
📅 Your 2026 Planting Dates
Direct Sow Outdoors
Tuesday, December 30, 2025
Based on last frost Tuesday, February 10, 2026 · Zone 9b
Pro tip: Sow Spinach directly outdoors 6 weeks before your last frost date.
🌿 Plant Details
☀️ Growing Requirements
☀️
Sun
Partial Shade to Full Sun
💧
Water
Regular (keep moist)
↔️
Spacing
6" apart
🌱
Planting Depth
0.5" deep
Seeds typically germinate in 7-14 days
Ready to Plant Spinach in Roosevelt?
Get your seeds now so they're ready by Tuesday, December 30, 2025.
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🤝 Good Companions
Full Companion Planting Guide for Spinach
See which plants help Spinach thrive, which to keep away, and raised bed layout tips →
🛠️ Supplies You'll Need
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Common Spinach Varieties
Popular cultivars to look for at your local nursery or seed supplier.
Bloomsdale Long Standing
Savoy (crinkled) heirloom spinach with thick, crumpled leaves; bolt-resistant and reliable.
Space
Smooth-leaved hybrid that resists bolting better than most; popular for spring and fall growing.
Malabar Spinach
Heat-tolerant tropical vine that thrives in summer when true spinach bolts; glossy, mild leaves.
New Zealand Spinach
Not a true spinach but produces similarly; very heat- and drought-tolerant groundcover.
Common Spinach Problems
What to watch for — and how to fix it before it spreads.
Pests
Larvae tunnel between leaf surfaces leaving white, serpentine trails; mines make leaves inedible.
Remove and destroy mined leaves immediately; use row covers; practice crop rotation.
Green colonies on undersides of leaves; transmit cucumber mosaic virus.
Spray with insecticidal soap; use row covers in spring; plant away from infected cucurbits.
Diseases
Yellow patches on upper leaf with purple-gray spores on undersides; spreads rapidly in cool, wet weather.
Plant resistant varieties; avoid overhead irrigation; ensure good airflow; apply copper fungicide.
Seedlings collapse at the soil line; caused by Pythium or Fusarium in wet, cool soils.
Improve drainage; use sterile potting mix for starting seeds; avoid overwatering.
Common Mistakes
Spinach bolts (flowers) almost immediately when days exceed 13–14 hours or temps go above 75°F.
Grow as a cool-season crop in spring (early) and fall; try heat-tolerant Malabar spinach in summer.
Spinach seeds need good soil contact; too-shallow seeding leads to poor, patchy germination.
Sow 1/2 inch deep; press soil firmly over seeds; keep moist until germination.
🌾 Seed Saving Guide
🟡 ModerateWhen to Harvest Seed
Let plants bolt in heat and allow seed stalks to dry fully before harvesting.
Processing
Strip dried seed stalks, thresh to release seeds, winnow to remove chaff.
Seed Viability
Up to 3 years when stored cool, dark, and dry.
Pro Tip
Spinach is wind-pollinated and dioecious — you need both male and female plants. Isolate by 1000 feet for pure seed.
Raised Bed Planting Guides
A 4×8 bed fits 4 per sq ft of Spinach. See plant counts, spacing grids, and companion pairings for every bed size →
Frequently Asked Questions
When should I plant Spinach in Roosevelt, Arizona? +
In Roosevelt (Zone 9b), direct sow Spinach outdoors around Tuesday, December 30, 2025.
What is the last frost date for Roosevelt, Arizona? +
The average last spring frost date for Roosevelt, Arizona (ZIP 85545) is around Tuesday, February 10, 2026. This is based on NOAA climate normals for USDA Zone 9b.
How long does Spinach take to grow? +
Spinach typically matures in about 40 days from direct sowing. In Roosevelt, that means you can expect harvest around Tuesday, December 30, 2025 plus 40 days.
Should I start Spinach indoors or direct sow in Arizona? +
Spinach does best when direct sown outdoors. In Roosevelt, sow directly around Tuesday, December 30, 2025.
📚 More Spinach Planting Guides
Other Plants for Roosevelt
Growing Spinach in Zone 9b
Spinach (Spinacia oleracea) is a popular garden vegetable. In Roosevelt, Arizona, which is in USDA Hardiness Zone 9b, you should direct sow seeds around Tuesday, December 30, 2025.
Your average last frost date is Tuesday, February 10, 2026. Spinach grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.