Copperhead, Amaranthus Seeds

Copperhead Amaranth Seed

Copper-toned foliage gives this amaranth uncommon ornamental depth
Tall upright plants add bold structure behind flowers
Drought tolerance supports performance in sunny drained sites
Both plumes and foliage bring texture to arrangements

See product details

Key Attributes

Botanical Name

Amaranthus caudatus

Days to maturity

90 Days

Sun

Full Sun

Packet

250 Seeds

About Copperhead, Amaranth Seed, Amaranth Seed

Copperhead amaranth is an ornamental variety prized for broad foliage that transitions from deep green to rich copper and bronze. Its upright growth adds bold color and texture to borders, containers, and mixed plantings. Plants perform best in full sun and well-drained soil, tolerate dry conditions once established, and attract pollinators. This resilient variety creates a dramatic garden accent with relatively little maintenance.

Growing details

Planting

Sow Depth

1/16"

Days to Germination

7–14 days

Germination Type

A - No Pretreatment

In-row plant spacing

8-12"

Row Spacing

12-18"

Plant profile

Life Cycle

Annual

Plant Height

72 inches

Growth Habits

Upright

Seed & variety

Seeds Per Ounce

34,000

Color

Copper, Green

Seed Type

Open Pollinated

Before Planting

Reserve a warm, sunny bed with loose soil and space for the selected amaranth’s mature height. Remove weeds before sowing because the tiny seedlings are difficult to cultivate, and avoid excess nitrogen where lodging is likely.

Planting

Direct sow amaranth after frost when soil is at least 65°F, or start indoors only 3–4 weeks earlier to avoid rootbound seedlings. Cover seed about 1/4 inch and maintain 70–75°F until emergence. Harden carefully, transplant into warm soil, and thin grain types to 10–18 inches or greens more closely.

Watering

Keep the seed zone damp through emergence, then shift to deeper irrigation as roots expand. Established plants handle short droughts, but grain and leaf production fall if they remain dry during flowering or rapid vegetative growth.

Fertilizer

A modest compost application is usually adequate. Side-dress leafy amaranth after repeated cutting only if color fades; grain and ornamental types need little nitrogen because lush, top-heavy stems lodge readily.

Harvesting

Harvest amaranth leaves while young and tender, taking outer leaves or cutting shoots above a node for regrowth. For grain, wait until flower heads dry and seeds release when rubbed; cut heads into bags, finish drying under cover, then thresh and winnow.

Tips

Stake tall ornamental forms before seed heads become heavy. For edible leaves, cut young tips repeatedly; for grain, isolate varieties if seed purity matters and remove volunteer plants before they become weedy.

AVG. Seeding Rate

1,600'/oz., 26,000'/lb., 1.2 lb./acre at 15 seeds/ft. in rows 18" apart.

Pests & Diseases

Damping-off, root rots, leaf spots, and white rust may affect amaranth. Watch for seedling collapse, dark roots, expanding leaf lesions, or pale raised pustules beneath leaves. Sow into warm, well-drained soil, rotate crops, avoid overhead irrigation, remove infected residue, and provide spacing that lets foliage dry quickly.

Flea beetles and caterpillars damage young leaves; tarnished plant bugs and aphids feed on shoots and seed heads. Inspect seedlings frequently, remove caterpillars, and control nearby pigweed relatives that harbor pests. Protect ripening grain with netting if finches or other birds become destructive.