How To Grow Care For New Guinea Impatiens

New Guinea Impatiens, scientifically known as Impatiens hawkeri, are vibrant and versatile flowering plants that add a burst of color to gardens, landscapes, and containers. Native to New Guinea, these impatiens have become a favorite among gardeners due to their stunning blooms, long-lasting performance, and adaptability to various growing conditions. In this comprehensive guide, we will delve into the details of How To Grow Care For New Guinea Impatiens to help you cultivate a thriving and colorful garden. Let’s begin…

Botanical Name-Impatiens hawkeri

Native– New Guinea



Common Name-New Guinea Impatiens

Plant Size– 12 to 24 inches(height), 12 to 18 inches (spread)

Plant Type-Herbaceous perennial

Flower Colour– shades of pink, purple, orange, red, and white.

Blooming Time-Late spring to fall

Common Varieties of New Guinea Impatiens

Several cultivars of New Guinea Impatiens are available, each offering unique colors and characteristics. Some popular varieties include:

  • ‘Infinity’ Series
  • ‘Celebration’ Series
  • ‘SunPatiens’ Series

Choose the Right Location

New Guinea Impatiens thrive in partial to full shade, making them ideal for gardens with filtered sunlight or areas receiving morning sunlight and afternoon shade. While they can tolerate some direct sunlight, it’s crucial to avoid prolonged exposure, especially during the hot afternoon hours. Select a location with well-drained soil enriched with organic matter, ensuring proper water drainage to prevent waterlogged roots.

Soil Preparation

Prepare the soil before planting New Guinea Impatiens by incorporating organic matter such as compost or well-rotted manure. This enhances the soil’s fertility, improves moisture retention, and promotes aeration. These impatiens prefer a slightly acidic to neutral soil pH ranging from 6.0 to 7.0. Conduct a soil test to determine the pH and amend accordingly.

Planting Guidelines for New Guinea Impatiens

  • Timing

Plant New Guinea Impatiens after the last frost date when the soil has warmed up. In cooler climates, you can start seeds indoors 8-10 weeks before the last expected frost.

  • Spacing

Allow enough space between plants, typically 12 to 18 inches, to provide adequate air circulation and prevent overcrowding as these impatiens can spread.

  • Depth

Plant the impatiens at the same depth as they were in the nursery containers. If planting from seeds, lightly press them into the soil surface as they require light to germinate.

  • Watering

New Guinea Impatiens prefer consistently moist soil but are susceptible to root rot if overwatered. Water the plants when the top inch of soil feels dry, aiming to keep the soil evenly moist. Use a soaker hose or water at the base of the plants to avoid wetting the foliage, which can lead to fungal issues.

  • Fertilizing

Feed New Guinea Impatiens regularly during the growing season to encourage continuous flowering. Use a balanced, water-soluble fertilizer with a ratio such as 10-10-10 or 14-14-14. Apply the fertilizer according to the package instructions, and be cautious not to over-fertilize, as excessive nutrients can lead to lush foliage at the expense of blooms.

  • Mulching

Applying a layer of organic mulch around New Guinea Impatiens helps retain soil moisture, suppress weeds, and regulate soil temperature. Use materials like straw, bark, or compost, ensuring the mulch is spread evenly but kept away from the base of the plants to prevent rot.

Pruning & Deadheading Care

Regular deadheading – removing spent flowers – promotes continuous blooming and prevents the plant from diverting energy to seed production. Additionally, light pruning can help shape the plants and improve air circulation. Trim leggy or damaged stems using clean, sharp scissors or pruning shears.

Common Pests and Disease with New Guinea Impatiens

While New Guinea Impatiens are relatively resistant to pests and diseases, it’s essential to monitor your plants for any signs of trouble. Aphids, spider mites, and fungal diseases can occasionally affect these impatiens. Use insecticidal soap or neem oil for pests, and apply fungicides if fungal issues arise. Proper spacing, adequate air circulation, and avoiding overhead watering contribute to disease prevention.


In colder climates, New Guinea Impatiens are typically grown as annuals due to their sensitivity to frost. However, if you want to overwinter them, consider digging up the plants before the first frost, potting them, and bringing them indoors to a bright, cool location. Reduce watering during the winter months, and reintroduce them to the garden after the last frost in spring.

How to Propagate New Guinea Impatiens?

Propagating New Guinea Impatiens can be done through various methods, including seeds, stem cuttings, and division. Here’s a brief guide on each propagation method:

Propagation from Seeds-

  • Start seeds indoors 8-10 weeks before the last expected frost date.
  • Use a seed-starting mix in trays or small pots, as New Guinea Impatiens seeds require light to germinate.
  • Press the seeds lightly onto the soil surface; do not cover them with additional soil.
  • Maintain a consistent temperature of around 70°F (21°C) for optimal germination.
  • Keep the soil consistently moist, and germination typically occurs in 14-21 days.
  • Transplant seedlings into larger containers or the garden once they have developed true leaves.

Propagation from Stem Cuttings-

  • Take 3 to 4-inch stem cuttings from healthy, non-flowering shoots.
  • Remove the lower leaves to expose a clean stem for planting.
  • Dip the cut end in rooting hormone to encourage root development.
  • Plant the cuttings in a well-draining potting mix or a mix of perlite and peat.
  • Place the pot in a warm, bright location with indirect light.
  • Keep the soil consistently moist and mist the cuttings regularly.
  • Once roots develop (usually in 2-4 weeks), transplant the cuttings into individual pots or the garden.

Propagation by Division-

  • Divide mature New Guinea Impatiens plants in the spring before new growth begins.
  • Gently lift the plant from the soil, exposing the root system.
  • Use a sharp knife or your hands to divide the plant into smaller sections, ensuring each section has both roots and shoots.
  • Replant the divisions in well-prepared soil, spacing them appropriately.
  • Water the newly planted divisions thoroughly and keep the soil consistently moist until they establish.
  • Regardless of the propagation method chosen, it’s essential to provide a warm and humid environment for the newly propagated plants. Maintain consistent moisture without waterlogging and protect them from direct sunlight until they are well-established.

Tip –Experimenting with different propagation methods allows you to propagate New Guinea Impatiens more efficiently and expand your garden with these colorful and resilient plants.

New Guinea Impatiens are a fantastic choice for gardeners looking to add a splash of color to shaded or partially shaded areas. By providing the right growing conditions, proper care, and attention, you can enjoy a profusion of beautiful blooms throughout the growing season. Whether you’re a seasoned gardener or a beginner, cultivating New Guinea Impatiens can be a rewarding experience, transforming your garden into a vibrant and lively oasis. Happy Gardening….

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