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How to Grow Pink Wave

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Pink Wave

Alternanthera dentata 'Pink Wave'

shrub

Pink Wave is a tender ornamental shrub featuring vibrant pink and burgundy foliage that intensifies in color with more sunlight. It's grown primarily as an annual in most climates or as a tender perennial in warm zones. The plant adds striking color contrast to gardens, containers, and landscaping designs.

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Example Pink Wave timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Pink Wave

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Pink Wave

    Around Apr 21

    ≈ 4 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Pink Wave dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 6-8+ hours daily (more sun intensifies pink coloring)
💧
Water: Keep soil consistently moist but not waterlogged; water deeply when top inch of soil is dry. Requires more frequent watering in hot weather and containers
📏
Spacing: 12-18 inches
📅
Days to maturity: 4-6 weeks to reach decorative size
🌱
Planting depth: Same depth as root ball for transplants; surface sow seeds and keep moist

Soil

Type: Well-draining fertile soil, preferably loamy
pH: 6.0-7.0
Amendments:
Compost or aged manure Peat moss or coconut coir Perlite for drainage

Growing Zones

Find your zone →

Zones 9b-11 as a perennial; grown as annual elsewhere

9b 10a 10b 11

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Growth Stages

1

Seedling

1-2 weeks

Tiny seedlings emerge with minimal pink coloring; primarily green

Keep soil consistently moist and maintain 70-75°F temperature. Provide bright, indirect light initially

2

Vegetative Growth

3-4 weeks

Plant develops multiple stems and oval leaves with increasing pink and burgundy hues, especially at leaf margins and centers

Pinch back growing tips to encourage bushier growth. Move to full sun gradually. Begin weekly feeding with diluted balanced fertilizer

3

Establishment

2-3 weeks

Plant becomes fuller and more compact; pink coloring deepens significantly with consistent sun exposure

Continue pinching back if more branching is desired. Maintain consistent moisture. Increase fertilizer to every 2 weeks

4

Peak Color & Maintenance

Throughout season

Mature plant displays vibrant pink, magenta, and burgundy foliage with dense branching; small cream or white flowers may appear (inconspicuous)

Deadhead spent flowers if desired. Prune to maintain shape. Water and fertilize regularly during growing season

5

Decline (Annual) or Dormancy (Perennial)

Varies by zone

In cold climates, foliage fades as frost approaches; in warm zones, plant may rest during winter or continue growing slowly

In zones 9b-11, reduce watering and fertilizing in winter. Elsewhere, plant dies back after first frost

Companion Planting

Plan your garden →

Plant with:

Caladium Coleus Dusty Miller Begonia Impatiens Salvia Celosia Ornamental grasses

Avoid planting near:

Dense shade plants that compete for light Plants requiring very dry conditions

Common Pests

  • Spray with insecticidal soap or neem oil; ensure good air circulation

  • Increase humidity; spray leaves with water; use miticide if severe

  • Remove with rubbing alcohol on cotton swab; treat with neem oil or insecticidal soap

  • and

    Remove by hand; use copper tape or diatomaceous earth around base

Uses

🌿

Colorful Foliage Displays

Ornamental

Pink Wave's vibrant pink and burgundy leaves provide striking color contrast in mixed borders, containers, and tropical-style gardens. The intense pigmentation intensifies with full sun exposure. [source]

🏠

Container and Patio Design

Household

Excellent for planters, hanging baskets, and mixed container gardens where its compact, bushy form and brilliant colors enhance patios, decks, and entryways. [source]

🎨

Floral Arrangements and Green Walls

Craft

The colorful foliage stems can be cut for fresh arrangements to last several days. Also used in living walls and vertical garden installations. [source]

🦋

Pollinator Support

Wildlife

While flowers are inconspicuous, they attract small pollinators and beneficial insects, supporting garden ecosystem health. [source]

Harvest Tips

Pink Wave is not harvested for food or cut flowers. Pinch or prune stems regularly (starting when 4-6 inches tall) to maintain bushy shape and encourage fuller growth. Cuttings can be propagated in water or moist soil to create new plants

Fun Facts

  • 🌱 Pink Wave's intense color is a result of anthocyanin pigments that increase with sun exposure; shaded plants remain greener with less vibrant pink coloring
  • 🌱 Also called Alternanthera or Joseph's Coat, Pink Wave is a cultivar of a plant used in aquascaping and Brazilian cuisine
  • 🌱 The plant is frost-tender but can be overwintered indoors as a houseplant in cooler climates by rooting cuttings in water

Gardening Terms

New to gardening? Learn about terms used in this guide:

Annual Deadhead Full Sun Perennial Pinch Back
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