Impatiens Walleriana Imara XDR Mix

Impatiens Walleriana Imara XDR Mix Seeds

(Impatiens Walleriana — Imara XDR Series — Syngenta Flowers)

Impatiens Walleriana Imara XDR Mix is not simply an improved impatiens — it is the answer to one of the most damaging plant disease crises in modern ornamental horticulture. Imara XDR is the first Impatiens walleriana with a high degree of resistance to downy mildew — confirmed in independent trials in North America and Europe including trials in 2017 and 2018 at Cornell University’s Long Island Horticultural Research and Extension Center. Best-in-class genetic performance under disease pressure, with rigorous controlled testing for disease resistance in laboratory and field settings and independent verification of testing and results by established authorities in the field.

The XDR designation stands for Xtra Disease Resistance — a Syngenta Flowers trademark that specifically identifies the series verified resistance performance. Imara XDR offers high resistance to Impatiens Downy Mildew, is easy to grow, and has the same plant structure, flowering time, flower size, and culture as traditional garden impatiens.

This last point is the critical commercial message: Imara XDR does not ask gardeners to change how they grow impatiens, what soil they use, or what containers they plant into. It delivers exactly the familiar impatiens garden experience — the mounding compact habit, the prolific continuous flowering, the shade tolerance, the broad color range — with the fundamental difference that the plants will not suddenly collapse to a grey fungal mush at the height of their display.

The downy mildew crisis that Imara XDR addresses devastated impatiens gardens worldwide from approximately 2011 onward. Impatiens downy mildew caused by Peronospora destructor f. sp. impatientis spread through impatiens plantings globally, causing plants to defoliate completely and die within days of symptom appearance, destroying entire mass plantings that had been trouble-free for decades.

The disease spreads via airborne sporangia and can persist in soil as oospores for multiple seasons, making affected garden sites unsuitable for standard walleriana impatiens for years after an outbreak. Imara XDR’s Cornell-verified resistance addresses this crisis directly, allowing shade gardeners to use Impatiens walleriana again with confidence.

Imara XDR Mix includes the full core color range: orange, orange star, purple, red, rose, salmon shades, and white — a complete assortment in a single formula mix. Garden height and width: 10–12 inches (25–30 cm). Exposure: shade. Suitable for packs, containers, hanging baskets, and landscapes.

Variety Details

• Botanical Name: Impatiens walleriana
• Series: Imara XDR
• Variety: Imara XDR Mix
• Breeder: Syngenta Flowers
• XDR meaning: Xtra Disease Resistance
• Key achievement: First Impatiens walleriana with Cornell University-verified high degree of resistance to downy mildew
• Seed Type: F1 Hybrid
• Plant Type: Tender perennial grown as a cool-season annual
• Family: Balsaminaceae
• Color Mix: Orange, Orange Star, Purple, Red, Rose, Salmon Shades, White
• Exposure: Full shade to part shade

Key Features

• First Impatiens walleriana with Cornell University-verified high degree of resistance to downy mildew — the landmark achievement that returns impatiens to shade gardens
• XDR — Xtra Disease Resistance — independently confirmed in North American and European field trials
• Same compact mounding habit, flower size, and culture as traditional garden impatiens — no change in growing method required
• Complete 7-colour formula mix: orange, orange star, purple, red, rose, salmon shades, and white
• Compact mounding plants 25–30 cm — ideal for shade borders, containers, hanging baskets, and mass plantings
• Reliable continuous non-stop flowering all season in full shade to part shade
• Easy and economical to produce — compact branching habit ideal for high-density growing
• Strong plants that hold up well during transport and at retail
• Seeds require light to germinate — do not bury
• Fast germination: 3–5 days at 22–24°C
• Important distinction from Solarscape XL: Imara XDR is a shade plant — Solarscape XL is sun-tolerant. Both are impatiens but serve entirely different light positions

Plant Information

• Height: 25–30 cm (10–12 inches)
• Spread: 25–30 cm (10–12 inches)
• Plant Type: Tender perennial grown as a cool-season annual
• Habit: Compact, mounding, well-branched
• Flower Size: Standard impatiens — approximately 3–4 cm across
• Light Requirement: Full shade to part shade — shade plant
• Recommended Containers: Packs, pints, quarts, gallons, hanging baskets
• Days to Germination: 3–5 days at 22–24°C

Germination Instructions

• Germination time: 3–5 days. Media temperature: 22–24°C.
• Light is required for germination. Seed cover: yes — cover with a very light layer of vermiculite.
• Moisture level: saturated — soil should be dark brown and shiny with free water present at the surface.
• Recommended tray size: 288-cell tray.
• Seeds per cell: 1. After germination, reduce moisture levels slightly and maintain at 20–22°C.
• Grow on in good light but away from direct sun.
• Transplant to individual 7–8 cm pots at 3–4 true leaves and grow on before outdoor transplanting at 20–25 cm spacing.
• For Kuwait: sow indoors in air-conditioned conditions in August–September.
• The warm indoor temperature of 22–24°C required for germination is easily maintained in Kuwait’s air-conditioned environments.
• The 3–5-day germination time makes Imara XDR one of the fastest-germinating ornamentals in this catalogue.
• Grow seedlings in a brightly lit indoor position but protected from direct sun until outdoor transplanting in October–November.
• Imara XDR is a shade plant — transplant to positions that receive fewer than 4 hours of direct sun daily.

Growing Tips

• Fill your gardens with bright, long-lasting color — Imara XDR has the same plant structure, flowering time, flower size, and culture as traditional garden impatiens.
• Grow in full shade to part shade in moist, humus-rich, well-drained soil. Water consistently — impatiens is not drought tolerant and will wilt rapidly if the root zone dries out.
• Water at soil level rather than overhead to reduce disease risk even with the XDR resistance advantage.
• Feed with a balanced liquid fertilizer every two weeks.
• No deadheading is required — impatiens is naturally self-cleaning, with spent blooms falling cleanly.
• Compact, well-branching, and strong — the plants hold up well during transport and display.
• Pinch growing tips at 10 cm height to encourage maximum branching and a fuller display.
• In Kuwait’s shaded positions, Imara XDR will perform through the full cool season and into the transitional period as long as the position remains shaded from direct afternoon sun.

Gulf Planting Season

• Indoor sowing (air-conditioned): August to mid-September
  Grow on indoors in air-conditioned conditions: September to October
  Transplant outdoors to shaded final position: October to November
  Peak flowering season: November to March
  Extended season: continues in shaded positions into April
  Note: Imara XDR Mix and Solarscape XL Red Glow are the two impatiens in this catalogue and together provide complete coverage of Kuwait’s shade and sun ornamental positions. Imara XDR is the shade specialist — for positions receiving fewer than 4 hours of direct sun.
• Solarscape XL is the sun specialist — for positions in full to partial sun.
• Both share the same germination temperature, indoor growing requirements, and October–November outdoor transplanting calendar, meaning they can be sown, grown on, and transplanted simultaneously for a complete impatiens collection covering every light level in Kuwait’s cool-season garden.

Garden Uses

• Imara XDR is ideal for shade gardens, borders, edging, focal points, ground cover, and mass plantings — the full range of traditional impatiens applications, now with the confidence of disease resistance.
• The complete 7-colour formula mix makes Imara XDR Mix a one-stop solution for shaded container and bed color in Kuwait’s cool season — the orange and red tones provide warm, bold color in deep shade where few other flowering ornamentals perform; the rose and salmon shades provide romantic, softer tones for containers on north-facing balconies and under pergolas; the white provides luminous brightness in the darkest corners where light-colored flowers read most effectively.
• Mass planted in groups of five or more in shaded raised beds or ground-level beds beneath trees and large shrubs, the compact mounding habit creates a continuous carpet of color through the full cool season without gaps, staking, or deadheading.
• In hanging baskets and wall-mounted containers on shaded walls, the tight mounding habit fills the container fully from edge to center — providing a solid dome of color that reads effectively from a distance.