Description

The Crimson Jewel, Ancient Wisdom, and the Amaranth of Extraordinary Beauty

Red Garnet amaranth is not just a plant; it’s a colour you can harvest.

In the height of summer, when the garden is at its loudest, Red Garnet moves like a deep living flame with leaves the colour of wine-dark velvet, and stems flushed with crimson. It is a whole plant that looks as if it has been painted by sunset. It is dramatic in the way the best food plants are dramatic: beautiful enough to stop you in your tracks, practical enough to earn its place in the kitchen every single day. You brush the foliage, and it feels tender, almost silky; you taste it, and the flavour is mild, green, and slightly nutty: a gentle richness that pairs with garlic, citrus, sesame, butter, and broth.

This is the kind of crop that makes you feel wealthy. You can harvest a handful of leaves for supper, and the plant keeps going, sending up more, growing taller, thickening into a lush, productive presence. Red Garnet is both ornament and nourishment: a leafy green with ancient roots, a modern garden showpiece, and a reminder that the most enduring plants feed the body and the eye at the same time.

A whisper of history

Amaranth is one of the great legacy crops of the Americas, cultivated for thousands of years in Mesoamerica for both leaf and seed, valued for its strength, nourishment, and resilience. In Aztec agriculture, it was more than food; it was culture, ceremony, and survival. Colonial suppression tried to erase it, but amaranth persisted in Indigenous communities and remote regions, carried forward by people who refused to let a sacred staple disappear. Today, growing Red Garnet is a small act of continuity: a living link to ancient agricultural wisdom, renewed in Canadian soil.

What You’ll Grow

• Plant type: Warm-season annual leafy green (also produces seed if allowed to flower)
• Plant size: typically 90 to 150 cm (3 to 5 ft) tall and 30 to 60 cm (1 to 2 ft) wide
• Leaves: broad, tender; deep crimson to garnet-red (colour intensifies with sun and maturity)
• Stems: sturdy, often red-tinged
• Flavour: mild, slightly nutty, spinach-like
• Texture: tender when young; best harvested regularly

Days to first harvest: about 30 to 45 days for baby leaves; 45 to 60 days for larger leaf harvests (varies with heat and fertility).

Growing Instructions

Red Garnet amaranth loves warmth. Treat it like a summer crop: warm soil, full sun, steady moisture, and regular harvesting.

When to Plant (Best Timing)

• Direct sow after last frost once soil is warm (ideally 18 to 21 °C)
• For an earlier start, sow 4 to 6 weeks indoors before the last frost and transplant after nights are reliably warm

Cold note: amaranth sulks in cold soil. If you sow too early, it may stall.

Direct Sowing (Recommended)

• Sow seeds 6 mm (1/4 in) deep
• Space seeds lightly; thin later
• Rows 30 cm (12 in) apart for leaf production (wider if you want large plants)
• Thin seedlings to:
  • 15 to 25 cm (6 to 10 in) apart for continuous leaf harvest
  • 30 to 45 cm (12 to 18 in) apart for big, showy plants and seed heads

Thinning matters: airflow + space = tender leaves and strong stems.

Starting Indoors (Optional)

• Sow 6 mm (1/4 in) deep in cells/pots
• Keep evenly moist; germination usually 5 to 10 days in warmth
• Transplant when seedlings are 5 to 7.5 cm (2 to 3 in) tall
• Harden off gently, and avoid cold nights

Site + Soil (How You Get Lush Colour + Tender Leaves)

• Full sun is best for the deepest red colour
• Soil should be fertile and well-drained
• Work in compost before planting
• Aim for pH ~6.0 to 7.0

Watering (Tender Leaves Live Here)

• Water consistently: about 2.5 cm (1 in) per week in dry spells
• Mulch helps keep moisture steady and reduces stress (stress can toughen leaves)

Feeding

• Amaranth is a moderate feeder
• Compost at planting is usually enough
• For continuous leaf harvest, a light mid-season feed (compost tea or balanced organic fertilizer) keeps growth lush

Weed Control

• Weed early while plants are small
• Once established, amaranth shades the soil and competes well

Pinching + Flowering (Leaf vs Seed)

• For maximum leaves: pinch the growing tip once plants are 20 to 30 cm (8 to 12 in) tall to encourage branching
• For seed saving: let plants grow tall and flower naturally

Pest Notes

• Generally hardy; watch for aphids on tender growth
• Good airflow and steady growth prevent most issues

Harvesting (How to Keep It Tender and Coming)

• Begin harvesting baby leaves at 10 to 15 cm (4 to 6 in) tall
• Harvest outer leaves first, letting the center keep growing
• Or cut stems back by 1/3 to encourage branching and a second flush

Harvest rule: the more you harvest, the more it produces and the more tender it stays.

Preserving + Storage

• Use fresh leaves quickly for the best colour and tenderness
• Refrigerate in a bag/container with a little humidity for 3 to 5 days

Preserving options:

• Blanch and freeze (2 to 3 minutes, then ice bath) for soups and sautés