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Orach

Leafy Green
Warm season
Full sun

Also known as: Mountain Spinach · Atriplex hortensis

Varieties

3 types of orach

When & where

Season
Warm season — the heat-loving spinach substitute
USDA zones
Annual in zones 4–10
Sun
Full sun
Start indoors
3–4 weeks before last frost (optional)
Direct sow outdoors
After last frost through midsummer
Days to harvest
40–60 days

Germination

Germination time
7–14 days
Soil temperature
50–75°F (10–24°C)

Spacing & depth

Sow depth
1/2" (12 mm)
Seed spacing
2 in, thin to 6–12 in
Mature plant spacing
6–12 in (15–30 cm)
Row spacing
18 in (45 cm)

How to plant

Direct-sow after frost — orach loves the summer heat that flattens spinach. Pinch flower stalks to keep the plant leafy; unpinched plants top 6 ft and drop thousands of self-sowing seeds. Young leaves for salads, mature leaves cooked like spinach.

Grower's tip

The best summer stand-in for spinach — mild, tender, and unfazed by 90°F days. Red orach glows almost neon in low sun and stains anything it touches pink.

Soil preferences

Soil type

Rich, moisture-retentive loam.

pH range

6.0–7.0

Amendments

Compost + a light nitrogen source (blood meal, aged manure) — greens are all leaf, so they want nitrogen.

Watering

Frequency

Consistent — 1 in per week minimum, more in heat. Uneven water triggers bolt.

Method

Overhead is fine in the morning; drip is best in humid climates.

Over vs. under

Overwatered: soft rot at the crown, yellow lower leaves. Underwatered: bitter flavor, tough leaves, premature bolting.

Top-water or bottom-water?

Either works — Top-water is fine — greens enjoy a gentle morning overhead rinse to cool the crown. Bottom-water indoor seedlings and microgreen trays to prevent damping-off. Skip evening overhead water.

Temperature tolerance

Ideal daytime air temp

55–75°F (13–24°C) — most greens bolt above 80°F (27°C)

Ideal nighttime air temp

45–60°F (7–16°C)

Frost sensitivity

Light frost tolerated by most; kale, spinach, mâche, and collards are cold-hardy and often sweeter after frost.

Container growing

Container-suitable?

Yes — great in containers

Recommended pot size

6–8 in deep, any width; a window box works

Notes

Perfect for pots and hydroponics; cut-and-come-again mixes give weeks of harvest per sowing.

Succession planting

Every 2 weeks spring and fall. Skip the hottest weeks or use shade cloth.

Detailed harvesting

Cut outer leaves and let the crown keep producing (cut-and-come-again), or cut the whole rosette 1 in above the crown for a fresh flush.

Post-harvest storage & preservation

Rinse, spin dry, and store in a sealed bag with a paper towel in the crisper 5–7 days. Blanch and freeze for cooking greens.

Culinary, medicinal & other uses

Salads, sautés, smoothies, soups. Bitter or overgrown leaves are best cooked, not raw.

Medicinal or traditional uses are shared for interest only — this is not medical advice. Consult a qualified professional before using any plant medicinally.

Seed saving

Pollination

Lettuce is self-pollinating; spinach is wind-pollinated; brassica greens (kale, arugula, mustard) are insect-pollinated and cross freely.

Isolation needs

Lettuce 20 ft; spinach 1/2 mile; brassicas 1/4 mile or cage.

How to save

Let a robust plant bolt; harvest dry seed stalks; rub clean; store dry.

Your zone's planting calendar

Pick your USDA hardiness zone and we'll estimate the key dates for orach in your area. These are regional averages — always check your own last-frost forecast before sowing.

From your kitchen — grow orach from what you already have

Let one plant bolt (send up its flower stalk) and it will make hundreds to thousands of seeds. Bolted greens are bitter to eat but perfect for saving.

  1. 1Pick your best, slowest-to-bolt plant as the seed parent.
  2. 2Let the flower stalk rise, bloom, and dry brown on the plant.
  3. 3Cut the whole stalk into a paper bag before it shatters.
  4. 4Rub between your hands to release seed; sieve out chaff; store dry.

Storage: 3–5 years dry.

My Orach notes

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Track packets and loose seeds you already have. Private to your account.

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