When to Plant Spinach in Henderson, NV
Published: April 24, 2026
Spinach Planting Dates for Henderson, NV
| Start seeds indoors | Year-round |
| Last frost (average) | January 30 |
| Direct sow outdoors | December 26–January 5 |
| Minimum soil temperature | 35°F |
| Expect first harvest | February 4 – February 14 |
| Fall crop planting | November 3–13 |
| Fall crop harvest | December 13 |
| First fall frost (average) | December 15 |
⚠ One of the earliest spring vegetables — sow 4–6 weeks before last frost. Bolts in heat above 75°F. Plant again in late summer for a fall harvest.
Best Spinach Varieties for Henderson, NV
Consult a Henderson-area nursery or your state extension office for spinach varieties proven in Zone 9a.
Growing Spinach in Henderson
Henderson sits in Zone 9a, with an average last frost of January 30 and first fall frost around December 15 — giving a 319-day frost-free growing season. Cool-season crops like spinach benefit from Henderson's cooler spring and fall windows, when temperatures stay in the 55–75°F sweet spot that produces the best flavor and least bolting.
In Henderson's warm climate, spinach works best as a fall, winter, and early-spring crop. Summer heat bolts most cool-season vegetables before they can produce a harvestable head or root. Plan primary plantings in October through February in Henderson, not April through June.
Henderson's caliche soil is rock-hard below the surface — raised beds filled with quality potting mix are the most practical approach for spinach. Breaking through caliche for in-ground planting requires significant soil amendment, gypsum application, and deep tilling over several seasons. Water at 1 inches per week delivered through drip irrigation for best results in a raised-bed system.
Spinach Calendar for Henderson
| Month | Task |
|---|---|
| Year | Start seeds indoors under grow lights |
| January | Last frost — soil warming, prepare bed |
| December | Direct sow seeds into warm soil |
| February | Expect first harvest window to open |
| November | Start fall crop — transplants or direct sow |
| December | First fall frost — harvest remaining, end of outdoor season |
Spinach Tips for Henderson Gardeners
- •Direct sow in very cold soil — spinach germinates at 35°F, earlier than almost any other crop.
- •Succession plant every 10 days until 2 weeks before heat sets in for continuous spring harvests.
- •Plant cool-season spinach in Henderson during October through February — spring plantings bolt before producing a usable crop in warm zones.
Common Spinach Pests in Henderson
- •Leaf Miner — peaks June–August in Zone 9a (active March–October); winding white trails in leaves; remove affected leaves and use row covers.
- •Aphid — peaks June–August in Zone 9a (active March–October); monitor closely during peak season and treat early.
- •Downy Mildew — peaks June–August in Zone 9a (active March–October); yellow patches on leaves with fuzzy underside growth; improve airflow and apply copper.
Check plants every 2–3 days during peak season — early intervention prevents most infestations from becoming serious.
What to Plant with Spinach in Henderson
In Henderson's warm climate, Pea and Strawberry are the most beneficial plants to grow alongside spinach. Pea improves nearby plant health and pest resistance. Keep spinach away from Fennel — it releases root chemicals that inhibit growth of most neighbors. Warm-climate gardeners especially benefit from dense, layered companion plantings that shade soil and reduce water loss.
Frequently Asked Questions
When should I plant spinach in Henderson, NV?
In Henderson (Zone 9a), direct sow spinach around December 26–January 5. Soil must be at 35°F or warmer at 2-inch depth before sowing — cold soil rots the seeds.
What zone is Henderson, NV for spinach growing?
Henderson is USDA Zone 9a. For spinach, this means a frost-free growing season of roughly 46 weeks running from January 30 to December 15. Cool-season crops like spinach thrive in this zone with both spring and fall planting windows available.
When is spinach harvest season in Henderson?
Expect the first spinach harvest in Henderson around February 4, with harvest continuing through February 14. This is based on 40–50 days from transplant or direct sow. A fall crop planted November 3–13 adds a second harvest around December 13.
How long does it take to grow spinach in Henderson, NV?
From transplant or direct sow to first harvest, spinach takes 40–50 days in Henderson's climate. Based on a typical planting date of December 26–January 5, expect your first harvest around February 4. Henderson's warm Zone 9a climate tends toward the faster end of this range — warmer soil and longer days accelerate maturity.
What soil does spinach need in Henderson?
Henderson's caliche subsoil is effectively rock — traditional in-ground planting of spinach produces poor results. Build a raised bed with 12–18 inches of quality potting mix or Mel's Mix for reliable production. Break through caliche only for deep-rooted crops, and expect to add compost each year to offset the alkalinity.