Description

The Summer Survivor, Green Abundance When All Else Fails

New Zealand spinach is the green that saves summer. When true spinach wilts, bolts, and turns bitter in heat, this hardy look-alike keeps going. It sprawls, thrives, and offers tender leaves through the long, hot stretch when gardeners crave greens and find only empty beds. It isn’t spinach at all (botanically), but it tastes and cooks remarkably like it: mild, nourishing, and endlessly helpful.

A whisper of history

Born along the wild Pacific coast, in sun, sand, salt, and wind, New Zealand spinach learned resilience the hard way. In 1770, Captain James Cook’s crew gathered it on the shores of New Zealand, valuing it as fresh green food on a long voyage. Seeds travelled back across oceans, and gardeners began growing it for one simple reason: it could do what spinach couldn’t, which was stay generous in summer.

What You’ll Grow

New Zealand spinach forms vigorous, ground-covering plants that spread 2–3 feet wide. Leaves are thick, dark green, triangular, and slightly succulent. Young leaves are tender; older leaves become a bit chewier but remain excellent when cooked. Once established, plants are notably heat-tolerant, drought-resistant, and surprisingly forgiving of poor soil.

Days to maturity: 50–70 days from seed to first harvest, then continuous picking until frost.

Growing Instructions (Your Complete Guide)

Best Planting Window (Canada)

• Direct sow after your last frost once nights are reliably mild and the soil has warmed.
• Aim for soil temperatures around 16–21°C (60–70°F) for best germination.
• In most Canadian gardens, this is typically late spring to early summer.

Seed Prep (Do This)

New Zealand spinach often germinates slowly because of its hard seed coat.

• Soak seeds in room-temperature water for 12–24 hours before sowing.
• Optional but helpful: after soaking, drain and sow immediately into warm soil.

How to Sow

• Sow 1.25 cm (1/2 inch) deep.
• Space seeds about 5–8 cm (2–3 inches) apart, then thin to the final spacing.
• Final spacing: 30–45 cm (12–18 inches) between plants.
• If you have room, give it space—plants can spread 60–90 cm (2–3 feet).

Germination (What to Expect)

• Germination is typically 10–21 days, sometimes longer.
• Keep the seedbed evenly moist (not soggy) during this period.
• Mark the row—many gardeners think it “failed” and accidentally disturb it.

Sun & Heat

• Full sun to partial shade.
• Full sun = fastest growth.
• In very hot locations, afternoon shade helps keep leaves extra tender.

Soil

• Prefers well-drained soil.
• Tolerates sandy/lean soils well.
• If your soil is heavy clay, plant on a slight mound or raised bed to improve drainage.

Watering

• Water regularly until plants are established.
• After that, it’s drought-tolerant, but best production comes with steady moisture.
• Water deeply, then let the top inch of soil dry slightly before watering again.
• Mulch helps conserve moisture and keeps leaves cleaner.

Feeding

• Minimal feeding required.
• Mix in a bit of compost at planting.
• If growth looks pale or slow, side-dress with compost once mid-season.
• Avoid heavy nitrogen feeding (can reduce leaf quality).

Weeding & Spacing Tip

• Weed carefully while plants are small.
• Once established, New Zealand spinach becomes its own living mulch, shading soil and suppressing weeds.

Harvesting (How to Keep It Producing)

• Begin harvesting when plants are 15–20 cm (6–8 inches) tall.
• Pinch or snip the tender growing tips (top 5–10 cm / 2–4 inches) and young leaves.
• Harvest often: the more you pick, the more it branches and produces.
• For best tenderness, pick young tips rather than large, older leaves.
• Plants will keep producing until killed by frost,. Harvest heavily before your first fall frost.

Culinary Notes: Spinach, But Summer-Proof

Use New Zealand spinach anywhere you’d use spinach.

• Fresh: Use only young leaves in salads for the most tender texture.
• Sautéed: Garlic + olive oil/butter = a perfect side
• Soups & stews: Adds colour and nutrition without overpowering flavour
• Stir-fries: Quick-cooking greens with a pleasant body
• Egg dishes: Great in quiche, frittata, omelettes
• Creamed: A near twin to creamed spinach

Note: Like spinach, it contains oxalates. If you’re sensitive, blanch briefly and discard the water.

Canadian Climate Notes

New Zealand spinach is ideal for Canadian summers, especially where spring spinach disappears as soon as heat arrives. Expect your best production in mid-summer through early fall. It also works beautifully as an edible ground cover, shading soil and helping suppress weeds.

Hardiness zones: 3–10 (grown as a warm-season annual; frost kills plants)

Seed Saving

Seed saving is straightforward.

• Let plants grow through summer; they will form small flowers and then hard, angular seed capsules.
• Leave capsules on the plant until they’re brown, hard, and scorched.
• Harvest and store capsules (whole or cracked open).

Seed viability: 3–5 years