Commercial Production of New Guinea Impatiens
HIL #526 Revised 8/99
Douglas A. Bailey,
Professor
Department of Horticultural Science
College of Agriculture
& Life Sciences
North Carolina State University
Commercial Production of New Guinea Impatiens
HIL #526 Revised 8/99
Douglas A. Bailey,
Professor
Department of Horticultural Science
College of Agriculture
& Life Sciences
North Carolina State University
New Guinea impatiens have steadily increased in popularity since their introduction into the U.S. in 1972. Today's varieties offer a wide range of flower colors as well as variegated foliage types. The versatility of this plant allows for its sale as bedding plants, 4 inch potted plants, and up to 12 inch hanging baskets.
Propagation
New Guinea impatiens are started from rooted
cuttings, except for Spectra F1 hybrids, which are grown from seed.
Most cultivars are patented, so do not take cuttings of New Guinea impatiens
unless you are a licensed propagator or you are certain you are growing a
non-patented variety. A 3/4 to 1 inch tip
cutting is the best material to propagate. Root cuttings using 72 to
75 °F bottom heat in a mist bed. Cuttings root in 8 to 18 days,
depending on the variety; most well-drained substrates are adequate for
propagation purposes.
Substrate Selection and Potting
Plant rooted cuttings in a
well-drained substrate that does not contain a large nutrient charge; New
Guineas are very susceptible to salts injury. A substrate pH of 5.8 to 6.2 is
preferable for a soilless substrate. Substrates containing 20% or more mineral
soil by volume should have a pH of 6.2 to 6.8. The number of cuttings per
container depends on the container size and the production schedule. In
general, use a single cutting for 4 and 5 inch pots; two for 6 inch pots; three
to four for an 8 inch and four to five for a 10 to 12 inch basket.
Pinching
Newer New Guinea impatiens varieties are
free-branching and do not require pinching. Pinching will delay flowering by 2
to 3 weeks. Pinching can be used as a timing device to delay flowering, if
necessary.
Watering
After potting, water only with clear water (no
fertilizer) for the first two weeks. New Guineas grow best if the substrate is
allowed to dry out between waterings, but not to the point of severe wilting.
Avoid overwatering plants throughout production.
Nutrition
Do not over fertilize New Guineas. They are
susceptible to salts injury. Micronutrient toxicities can occur if substrate pH
is too low. Excess micronutrients cause dieback of the growing tips, marginal
necrosis of leaves, and eventual plant collapse.
Fertilization should begin once roots are visible in the soil ball at the edge of the pot. Use 100 to 150 ppm nitrogen, 50 to 75 ppm phosphorus, and 100 to 150 ppm potassium at each watering, once plants are established. If fertilizer is not applied at every watering, then use 300 to 350 ppm nitrogen, 100 ppm phosphorus, and 300 to 350 ppm potassium every third watering. Use recommended saturated media (paste) substrate tests and foliar analysis test levels for New Guinea impatiens as guides to monitor the crop's nutrient status (Tables 1 and 2).
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Table 1. Recommended saturated media (paste) substrate test ranges for New Guinea impatiens grown in a soilless substrate.* |
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*From the University of Minnesota. Units for EC are dS/cm (mmhos/cm). Units for all elements are ppm. |
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Table 2. Recommended tissue analysis standards for New Guinea impatiens.* |
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Nitrogen |
2.5 to 4.5 |
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Phosphorus |
0.3 to 0.8 |
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Potassium |
1.9 to 2.7 |
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Calcium |
1.0 to 2.0 |
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Magnesium |
0.3 to 0.8 |
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Sulfur |
0.13 to 0.75 |
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Iron |
150 to 250 |
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Manganese |
100 to 250 |
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Zinc |
40 to 85 |
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Copper |
5 to 10 |
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Boron |
50 to 60 |
|
Mo |
1 to 10 |
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*From the University of Minnesota. |
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Light
Full light is needed during winter and early spring. A
minimum of 3000 to 4000 footcandles (fc) is suggested. Too low of a light level
reduces variegation and color intensity in leaves and results in poor
flowering. Apply shadecloth if light levels exceed 6000 fc to avoid sun burn of
foliage.
Temperature
Proper plant development requires relatively warm
temperatures. After rooting, use a 65 to 68 °F night temperature and a
75 °F venting temperature. Night temperatures above 72 °F can cause a
delay in flowering and should be avoided. Once plants are well established, the
night temperature can be dropped to 62 to 64 °F.
Height Control
Excessive stretching is best controlled
through maintaining high light levels, adequate spacing, and proper
fertilization and watering practices. Many of the newest cultivars have a
compact growth habit and do not require chemical height control. For cultivars
that stretch, use a foliar spray of Bonzi™ at 5 to 30 ppm. New Guinea
impatiens also respond to a negative DIF, and height can be controlled by
maintaining slightly higher night temperatures than day temperatures.
Spacing and Scheduling
Spacing too close will result in excessive stretching. After cuttings are potted, maintain pot to pot spacing until plant canopies reach the edge of the pot. Afterwards, space out according to need (Table 3).
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Table 3. Spacing and scheduling recommendations for New Guinea impatiens. |
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Pot or basket size (inches diameter) |
Spacing (inches) |
Number of cuttings per container |
Weeks from potting to finish |
|
4 |
7 x 7 |
1 |
6 to 8 |
|
5 |
8 x 8 |
1 |
7 to 9 |
|
6 |
10 x 10 |
2 |
8 to 10 |
|
8 |
14 x 14 |
3 |
8 to 10 |
|
10 |
18 x 18 |
4 |
12 to 14 |
|
12 |
20 x 20 |
5 |
12 to 14 |
The timing of New Guinea impatiens depends on several factors, including cultivar, light level, temperature, number of cuttings per pot, and pot size. Use Table 3 as a guide in scheduling your New Guinea crops.
Cultivars
The number of varieties available to growers
increases each year. A recent survey conducted by Clemson University concluded
that growers are producing the following percentages of each flower color for
their New Guinea impatiens hanging baskets: reds = 30 to 35%; pinks plus pink
bicolors = 45 to 50%; lavenders = 10 to 15%; and whites = 5%. This is a good
starting point in planning a marketing mix for colors. The problem arises when
trying to determine the percentage of leaf colors and variegations. Table 4
lists many of the currently available cultivars to assist in cultivar
selection. The final column in Table 4 indicates the landscape performance of
many of the cultivars. The performance ratings are from annual bedding plant
trials conducted at NC State University and Clemson University. These ratings
should assist growers in selecting cultivars best suited for the Southeastern
landscape.
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Table 4. New Guinea impatiens cultivars sorted by flower color. |
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|---|---|---|---|---|---|---|
|
Flower Color |
SeriesZ |
Cultivar |
Leaf Color |
Variegated Foliage?Y |
Growth HabitX |
Landscape RatingW |
|
White |
Baby Bonita |
White |
Medium Green |
No |
1 |
|
|
White |
Celebration |
White |
Medium Green |
No |
2 |
3.4 |
|
White |
Celebrette |
Frost |
Medium Green |
No |
1 |
|
|
White |
Danziger |
Waltz |
Medium Green |
No |
3 |
2.1 |
|
White |
Harmony |
White |
Medium Green |
No |
|
|
|
White |
Lasting Impressions |
Innocence |
Dark Green |
Slight |
3 |
2.8 |
|
White |
Paradise |
White (Moorea) |
Medium Green |
No |
2 |
2.6 |
|
White |
Patriot |
White |
Medium Green |
No |
3 |
3.6 |
|
White |
Pizzazz |
White (Jose) |
Medium Green |
No |
3 |
|
|
White |
Pot O’ Gold |
White |
Medium Green |
No |
2 |
|
|
White |
Spectra |
White |
Dark Green |
Yes |
2 |
2.8 |
|
White |
Sunshine |
Cirrus |
Medium Green |
Yes |
4 |
2.2 |
|
White |
Sunshine |
Milkyway |
Medium Green |
Yes |
3 |
3.5 |
|
White |
Twice As Nice |
Allegro |
Medium Green |
No |
2 |
|
|
White w/ Pink Eye |
Paradise |
Pearl White (Improved Samoa) |
Medium Green |
No |
3 |
4.0 |
|
Light Pink |
Bull |
Melanie |
Dark Green |
No |
3 |
3.4 |
|
Light Pink |
Celebration |
Blush Pink |
Medium Green |
No |
2 |
4.1 |
|
Light Pink |
Celebrette |
Light Pink |
Medium Green |
No |
1 |
|
|
Light Pink |
Harmony |
Light Orchid |
Medium Green |
No |
2 |
|
|
Light Pink |
Harmony |
Light Pink |
Medium Green |
No |
2 |
|
|
Light Pink |
Java |
Pearl |
Medium Green |
No |
2 |
|
|
Light Pink |
Lasting Impressions |
Illusion |
Medium Green |
No |
4 |
4.6 |
|
Light Pink |
Paradise |
Light Pink (Woya) |
Dark Green |
No |
3 |
3.5 |
|
Light Pink |
Patriot |
Soft Pink |
Medium Green |
No |
3 |
3.9 |
|
Light Pink |
Spectra |
Light Pink Shades |
Medium Green |
Yes |
3 |
2.1 |
|
Light Pink |
Sunshine |
Equinox |
Bronze |
Yes* |
3 |
3.4 |
|
Light Pink |
Twice As Nice |
Canon |
Medium Green |
No |
2 |
|
|
Pink |
Baby Bonita |
Mid-Pink |
Medium Green |
No |
1 |
|
|
Pink |
Bull |
Barbara |
Medium Green |
No |
2 |
1.4 |
|
Pink |
Bull |
Doerte |
Bronze |
No |
2 |
|
|
Pink |
Bull |
Lisa |
Medium Green |
Yes** |
2 |
|
|
Pink |
Bull |
Tina |
Dark Green |
No |
3 |
|
|
Pink |
Celebration |
Deep Pink |
Dark Green |
No |
2 |
3.7 |
|
Pink |
Celebrette |
Hot Pink |
Medium Green |
No |
1 |
|
|
Pink |
Harmony |
Pink |
Medium Green |
No |
2 |
|
|
Pink |
Java |
Pink |
Medium Green |
No |
2 |
|
|
Pink |
Lasting Impressions |
Rosetta |
Dark Green |
No |
3 |
2.3 |
|
Pink |
Patriot |
Pink |
Medium Green |
No |
3 |
3.6 |
|
Pink |
Pizzazz |
Light Pink (Juan) |
Dark Green |
No |
3 |
|
|
Pink |
Pot O’ Gold |
Pink |
Medium Green |
No |
2 |
|
|
Pink |
Pure Beauty |
Light Pink (Kallima) |
Bronze |
No |
2 |
1.9 |
|
Pink |
Pure Beauty |
Rose (Aglia) |
Medium Green |
Yes** |
3 |
3.7 |
|
Pink |
Sunshine |
Gemini |
Medium Green |
Yes |
5 |
3.3 |
|
Pink |
Twice As Nice |
Minuet |
Medium Green |
No |
2 |
|
|
Pink |
Twice As Nice |
Waltz |
Medium Green |
No |
2 |
|
|
Dark Pink |
Bull |
Doerte |
Dark Green |
No |
3 |
2.0 |
|
Dark Pink |
Celebration |
Electric Pink |
Dark Green |
No |
3 |
4.0 |
|
Dark Pink |
Celebration |
Sangria |
Dark Green |
No |
3 |
|
|
Dark Pink |
Celebrette |
Pink Jewel |
Medium Green |
No |
1 |
|
|
Dark Pink |
Danziger |
Dandin |
Dark Green |
No |
4 |
3.6 |
|
Dark Pink |
Danziger |
Dangal |
Medium Green |
No |
3 |
4.9 |
|
Dark Pink |
Harmony |
Magenta |
Medium Green |
No |
2 |
|
|
Dark Pink |
Paradise |
Deep Pink (Bonaire) |
Dark Green |
No |
3 |
2.9 |
|
Dark Pink |
Patriot |
Pink Salmon |
Medium Green |
No |
2 |
3.0 |
|
Dark Pink |
Pure Beauty |
Fuchsia (Apollon) |
Dark Green |
No |
5 |
4.4 |
|
Dark Pink |
Pure Beauty |
Magenta (Jolana) |
Dark Green |
No |
5 |
4.0 |
|
Dark Pink |
Pure Beauty |
Pink (Dark Delias) |
Medium Green |
No |
1 |
4.2 |
|
Dark Pink |
Sunshine |
Enterprise |
Dark Green |
Yes |
4 |
0.0 |
|
Dark Pink |
Twice As Nice |
Etude |
Medium Green |
No |
2 |
|
|
Pink w/ Rose Bicolor |
Celebration |
Candy Pink |
Dark Green |
No |
3 |
2.9 |
|
Pink w/ Rose Bicolor |
Lasting Impressions |
Impulse |
Medium Green |
No |
3 |
4.9 |
|
Pink w/ Rose Bicolor |
Twice As Nice |
Duet |
Medium Green |
No |
2 |
|
|
Pink w/ Fuchsia Bicolor |
Liberty |
Lilac & Red |
Dark Green |
No |
4 |
4.1 |
|
Pink w/ Fuchsia Bicolor |
Paradise |
Fuchsia on Lavender (Improved Guadeloupe) |
Dark Green |
No |
2 |
3.6 |
|
Pink w/ Fuchsia Bicolor |
Pot O’ Gold |
Purple Bicolor |
Dark Bronze |
No |
2 |
|
|
Pink w/ Rose Bicolor |
Celebration |
Rose Star |
Medium Green |
No |
5 |
|
|
Pink w/ Red Bicolor |
Paradise |
Red on Pink (Pago Pago) |
Dark Green |
No |
2 |
3.8 |
|
Pink w/ Red Bicolor |
Pure Beauty |
Lavender on Purple (Octavia) |
Medium Green |
No |
4 |
|
|
Pink w/ Red Bicolor |
Pure Beauty |
Red on Pink (Neptis) |
Medium Green |
No |
4 |
3.5 |
|
Pink w/ White Eye |
Paradise |
Pink Frost (Tortola) |
Medium Green |
No |
3 |
|
|
Light Pink w/ Fuchsia Eye |
Celebrette |
Apple Blossom |
Medium Green |
No |
1 |
|
|
Pink w/ Red Eye |
Paradise |
Tahiti |
Medium Green |
No |
2 |
3.6 |
|
Pink w/ Purple Eye |
Danziger |
Danlight |
Dark Green |
No |
4 |
2.9 |
|
Pink w/ Purple Eye |
Harmony |
Purple Eye |
Medium Green |
No |
2 |
|
|
Pink w/ Lavender Bicolor |
Paradise |
Orchid on Blue (Tonga) |
Dark Bronze |
No |
1 |
3.8 |
|
Light Salmon |
Celebration |
Light Salmon Improved |
Medium Green |
Yes |
3 |
|
|
Light Salmon |
Harmony |
Light Coral |
Medium Green |
No |
2 |
|
|
Light Salmon |
Pure Beauty |
Light Coral (Melissa) |
Dark Green |
No |
3 |
4.2 |
|
Lt. Salmon w/ White Eye |
Celebrette |
Peach |
Bronze |
No |
1 |
|
|
Salmon w/ White Eye |
Paradise |
Salmon Flare |
Dark Green |
Yes* |
2 |
|
|
Salmon |
Baby Bonita |
Salmon |
Medium Green |
No |
1 |
|
|
Salmon |
Bull |
Alice |
Medium Green |
No |
3 |
|
|
Salmon |
Bull |
Flora |
Bronze |
No |
3 |
|
|
Salmon |
Bull |
Marien |
Dark Green |
No |
3 |
|
|
Salmon |
Celebration |
Salmon |
Medium Green |
Yes |
3 |
5.0 |
|
Salmon |
Harmony |
Salmon |
Medium Green |
No |
2 |
|
|
Salmon |
Liberty |
Salmon Orange |
Dark Green |
No |
3 |
3.6 |
|
Salmon |
Paradise |
Deep Coral (Lopinga) |
Medium Green |
No |
2 |
3.0 |
|
Salmon |
Paradise |
Salmon (Grenada) |
Dark Green |
No |
2 |
3.0 |
|
Salmon |
Pizzazz |
Salmon (Pablo) |
Dark Green |
No |
3 |
|
|
Salmon |
Pot O’ Gold |
Salmon |
Bronze |
No |
2 |
|
|
Salmon |
Pure Beauty |
Salmon Pink |
Dark Green |
Yes* |
2 |
|
|
Salmon |
Spectra |
Salmon Shades |
Medium Green |
No |
3 |
2.7 |
|
Dark Salmon |
Celebration |
Bright Coral |
Dark Green |
No |
3 |
5.0 |
|
Dark Salmon |
Celebration |
Deep Coral |
Bronze |
Yes |
3 |
4.1 |
|
Dark Salmon |
Harmony |
Deep Salmon |
Medium Green |
No |
2 |
|
|
Salmon Pink |
Lasting Impressions |
Cameo |
Medium Green |
Slight |
4 |
3.1 |
|
Salmon Coral |
Bull |
Inge |
Bronze |
No |
2 |
0.0 |
|
Coral |
Bull |
Natalie |
Bronze |
No |
2 |
|
|
Salmon Coral |
Bull |
Rosemarie |
Dark Green |
No |
3 |
1.4 |
|
Salmon Orange |
Danziger |
Danshir |
Dark Green |
No |
2 |
3.7 |
|
Salmon Orange |
Lasting Impressions |
Charade |
Dark Green |
No |
2 |
2.5 |
|
Orange |
Bull |
Mathilde |
Dark Bronze |
No |
3 |
2.5 |
|
Orange |
Celebration |
Apricot |
Dark Green |
No |
3 |
|
|
Orange |
Celebration |
Orange |
Medium Green |
No |
3 |
|
|
Orange |
Harmony |
Orange |
Medium Green |
No |
2 |
|
|
Orange |
Java |
Orange Flame |
Medium Green |
No |
2 |
|
|
Orange |
Lasting Impressions |
Ambrosia |
Dark Green |
No |
4 |
3.4 |
|
Orange |
Lasting Impressions |
Escapade |
Dark Green |
No |
3 |
5.0 |
|
Orange |
Paradise |
Apricot |
Medium Green |
No |
2 |
|
|
Orange |
Paradise |
Electric Orange (Timor) |
Medium Green |
No |
1 |
4.6 |
|
Orange |
Paradise |
Orange (Xanthia) |
Medium Green |
No |
2 |
2.7 |
|
Orange |
Patriot |
Orange |
Medium Green |
No |
3 |
3.7 |
|
Orange |
Pizzazz |
Orange (Saul) |
Dark Green |
No |
3 |
|
|
Orange |
Pot O’ Gold |
Orange |
Bronze |
No |
2 |
|
|
Orange |
Sunshine |
Nebulous |
Dark Green |
No |
4 |
4.9 |
|
Orange |
Sunshine |
Zenith |
Medium Green |
Yes |
3 |
2.4 |
|
Orange |
Twice As Nice |
Sonata |
Medium Green |
No |
2 |
|
|
Dark Orange |
Bull |
Suzanne |
Medium Green |
No |
4 |
2.5 |
|
Dark Orange |
Celebration |
Bonfire Orange |
Dark Bronze |
No |
2 |
4.4 |
|
Dark Orange |
Paradise |
Tanna |
Dark Green |
No |
3 |
1.9 |
|
Dark Orange |
Sunshine |
Nova |
Dark Green |
Yes |
2 |
2.8 |
|
Orange Red |
Harmony |
Flame |
Medium Green |
No |
2 |
|
|
Orange Red |
Pure Beauty |
Scarlet (Marpesia) |
Dark Bronze |
No |
3 |
3.4 |
|
Orange w/ Fuchsia Eye |
Celebrette |
Orange Crush |
Dark Green |
No |
1 |
|
|
Orange w/ White Bicolor |
Lasting Impressions |
Tempest |
Dark Green |
Yes |
1 |
1.2 |
|
Orange w/ White Bicolor |
Pure Beauty |
Orange on White (Lycia) |
Medium Green |
No |
4 |
3.6 |
|
Orange w/ Pink Bicolor |
Lasting Impressions |
Ambience |
Medium Green |
No |
3 |
2.4 |
|
Orange w/ Salmon Bicolor |
Sunshine |
Sunburst |
Bronze |
Slight |
3 |
3.5 |
|
Orange w/ Salmon Bicolor |
Sunshine |
Sunglow |
Dark Green |
Yes |
1 |
1.4 |
|
Orange w/ Salmon Bicolor |
Sunshine |
Twilight |
Bronze |
Yes |
3 |
1.0 |
|
Orange w/ Dark Orange Bicolor |
Pure Beauty |
Orange on Orange |
Dark Green |
No |
2 |
|
|
Orange w/ Red Bicolor |
Danziger |
Danova |
Dark Bronze |
No |
3 |
1.9 |
|
Orange w/ Red Bicolor |
Pot O’ Gold |
Red Bicolor |
Dark Bronze |
No |
2 |
|
|
Rose |
Baby Bonita |
Rose (Improved Tolinga) |
Medium Green |
No |
1 |
|
|
Rose |
Celebration |
Electric Rose |
Dark Green |
Yes |
3 |
3.3 |
|
Rose |
Celebration |
Rose |
Medium Green |
No |
3 |
3.5 |
|
Rose |
Pizzazz |
Rose |
Dark Green |
No |
3 |
|
|
Rose |
Spectra |
Rose Shades |
Medium Green |
Slight |
3 |
2.0 |
|
Rose w/ Fuchsia Eye |
Paradise |
Cherry Rose (Anguilla) |
Dark Green |
No |
2 |
|
|
Fuchsia |
Bull |
Wanda |
Dark Green |
No |
3 |
|
|
Fuchsia |
Harmony |
Fuchsia |
Medium Green |
No |
2 |
|
|
Fuchsia |
Paradise |
Fuchsia (Papete) |
Medium Green |
No |
1 |
|
|
Fuchsia |
Sunshine |
Pulsar |
Dark Green |
Yes |
3 |
3.6 |
|
Fuchsia |
Sunshine |
Radiance |
Medium Green |
Yes |
2 |
4.6 |
|
Fuchsia Red |
Bull |
Anna |
Dark Green |
No |
3 |
1.1 |
|
Fuchsia w/ Purple Eye |
Celebrette |
Hot Rose |
Medium Greeen |
No |
1 |
|
|
Red |
Baby Bonita |
Scarlet |
Medium Green |
No |
1 |
|
|
Red |
Bull |
Betty |
Dark Green |
No |
3 |
|
|
Red |
Bull |
Karina |
Dark Green |
No |
2 |
1.9 |
|
Red |
Celebration |
Cherry Red |
Medium Green |
No |
4 |
|
|
Red |
Celebration |
Deep Red |
Dark Green |
No |
2 |
|
|
Red |
Celebration |
Red |
Dark Green |
No |
3 |
4.9 |
|
Red |
Celebrette |
Cherry |
Dark Green |
No |
1 |
|
|
Red |
Celebrette |
Cherry Rose |
Medium Green |
No |
1 |
|
|
Red |
Celebrette |
Scarlet |
Medium Green |
No |
1 |
|
|
Red |
Danziger |
Danhill |
Medium Green |
No |
4 |
3.3 |
|
Red |
Danziger |
Rhondo |
Medium Green |
No |
3 |
2.0 |
|
Red |
Harmony |
Cherry Rose |
Medium Green |
No |
2 |
|
|
Red |
Harmony |
Royal Red |
Medium Green |
No |
2 |
|
|
Red |
Harmony |
Scarlet |
Medium Green |
No |
2 |
|
|
Red |
Lasting Impressions |
Masquerade |
Dark Bronze |
No |
3 |
|
|
Red |
Paradise |
Bright Red (Tarawa) |
Medium Green |
No |
3 |
3.8 |
|
Red |
Paradise |
Cherry Red (Martinique) |
Medium Green |
No |
2 |
2.6 |
|
Red |
Paradise |
Red (Lanai) |
Medium Green |
No |
3 |
|
|
Red |
Paradise |
Scarlet (Antigua) |
Medium Green |
No |
3 |
4.4 |
|
Red |
Paradise |
True Red (Moala) |
Medium Green |
No |
3 |
3.1 |
|
Red |
Patriot |
Red |
Medium Green |
No |
2 |
3.3 |
|
Red |
Pizzazz |
Cherry Rose (Ramon) |
Dark Green |
No |
3 |
|
|
Red |
Pizzazz |
Scarlet Red (Raul) |
Dark Green |
No |
3 |
|
|
Red |
Pot O’ Gold |
Red |
Medium Green |
No |
2 |
|
|
Red |
Pure Beauty |
Bright Red (Prepona) |
Dark Green |
No |
2 |
1.6 |
|
Red |
Pure Beauty |
Red (Anaea) |
Medium Green |
No |
3 |
|
|
Red |
Spectra |
Red Shades |
Medium Green |
No |
3 |
3.2 |
|
Red |
Sunshine |
Mirach |
Medium Green |
Yes |
3 |
4.2 |
|
Red |
Twice As Nice |
Largo |
Medium Green |
No |
2 |
|
|
Dark Red |
Harmony |
Dark Red |
Medium Green |
No |
2 |
|
|
Dark Red |
Lasting Impressions |
Blazon |
Dark Green |
Slight |
3 |
3.1 |
|
Dark Red |
Paradise |
Wine (Noctua) |
Dark Green |
No |
2 |
|
|
Dark Red |
Patriot |
Dark Red |
Dark Green |
No |
3 |
4.0 |
|
Red w/ Pink Bicolor |
Celebration |
Cherry Star |
Dark Bronze |
No |
2 |
2.9 |
|
Red w/ Dark Red Bicolor |
Electra |
Red |
Medium Green |
No |
2 |
|
|
Lavender |
Baby Bonita |
Lavender |
Medium Green |
No |
1 |
|
|
Lavender |
Bull |
Jennifer |
Dark Green |
No |
2 |
|
|
Lavender |
Celebration |
Lavender Glow |
Medium Green |
No |
3 |
3.6 |
|
Lavender |
Celebration |
Light Lavender Improved |
Medium Green |
No |
3 |
|
|
Lavender |
Celebrette |
Orchid |
Medium Green |
No |
1 |
|
|
Lavender |
Danziger |
Flamenco |
Medium Green |
No |
3 |
1.8 |
|
Lavender |
Harmony |
Lavender Purple |
Medium Green |
No |
2 |
|
|
Lavender |
Harmony |
Light Purple |
Medium Green |
No |
2 |
|
|
Lavender |
Java |
Lilac Flame |
Medium Green |
No |
2 |
|
|
Lavender |
Lasting Impressions |
Heathermist |
Dark Green |
No |
3 |
3.4 |
|
Lavender |
Lasting Impressions |
Serenade |
Medium Green |
No |
3 |
3.6 |
|
Lavender |
Lasting Impressions |
Tiffany |
Dark Green |
No |
3 |
|
|
Lavender |
Liberty |
Lavender |
Dark Green |
No |
2 |
3.6 |
|
Lavender |
Paradise |
Lavender Blue (Toga) |
Medium Green |
No |
2 |
4.1 |
|
Lavender |
Patriot |
Lavender |
Medium Green |
No |
3 |
2.6 |
|
Lavender |
Twice As Nice |
Baroque |
Medium Green |
No |
2 |
|
|
Light Purple |
Paradise |
Orchid (Pascua) |
Medium Green |
No |
2 |
3.8 |
|
Purple |
Baby Bonita |
Purple |
Medium Green |
No |
1 |
|
|
Purple |
Bull |
Mary |
Bronze |
No |
2 |
|
|
Purple |
Celebration |
Purple |
Medium Green |
No |
3 |
|
|
Purple |
Celebrette |
Grape Crush |
Medium Green |
No |
1 |
|
|
White |
Celebrette |
White |
Medium Green |
No |
1 |
|
|
Purple |
Celebrette |
Wild Plum |
Medium Green |
No |
1 |
3.3 |
|
Purple |
Danziger |
Danserra |
Dark Green |
No |
2 |
2.5 |
|
Purple |
Danziger |
Samba |
Dark Green |
No |
3 |
1.6 |
|
Purple |
Harmony |
Grape |
Medium Green |
No |
|
|
|
Purple |
Harmony |
Purple |
Medium Green |
No |
2 |
|
|
Purple |
Paradise |
Violet (Bora-Bora) |
Medium Green |
No |
2 |
|
|
Purple |
Patriot |
Lilac |
Medium Green |
No |
2 |
|
|
Purple |
Patriot |
Violet |
Medium Green |
No |
3 |
3.3 |
|
Purple |
Pizzazz |
Purple (Carlos) |
Dark Green |
No |
3 |
|
|
Purple |
Pot O’ Gold |
Violet |
Bronze |
No |
2 |
|
|
Purple |
Pure Beauty |
Light Purple |
Dark Green |
No |
2 |
|
|
Purple |
Pure Beauty |
Purple (Aruba) |
Dark Green |
No |
1 |
4.6 |
|
Purple |
Pure Beauty |
Violet |
Dark Green |
No |
2 |
|
|
Dark Purple |
Lasting Impressions |
Rhapsody |
Medium Green |
No |
4 |
1.7 |
|
Dark Purple |
Patriot |
Purple Lilac |
Medium Green |
No |
3 |
|
|
Purple Rose |
Celebration |
Raspberry Rose |
Medium Green |
No |
2 |
4.5 |
|
Purple Red |
Danziger |
Lambada |
Bronze |
No |
2 |
4.3 |
|
Purple Lavender |
Sunshine |
Antares |
Medium Green |
Slight |
2 |
3.9 |
|
Purple w/ Pink Bicolor |
Pure Beauty |
Purple on Lilac |
Medium Green |
No |
2 |
|
|
Purple w/ Lavender Bicolor |
Celebration |
Purple Star |
Bronze |
No |
3 |
|
|
Purple w/ Lavender Bicolor |
Lasting Impressions |
Shadow |
Dark Green |
No |
3 |
2.8 |
|
Purple w/ Lavender Bicolor |
Sunshine |
Sunregal |
Dark Green |
Slight |
1 |
3.1 |
|
ZBaby Bonita®, Paradise®,
Pizzazz®, and Pure Beauty™ series are products of Kientzler
Jungpflanzen, Gensingen, Germany. Bull series is a product of Gartenbau Norbert
Bull, Goennebek, Germany. Celebration and Celebrette series are products of
Ball FloraPlant, West Chicago, Illinois. Danziger and Harmony series are
products of Dan Flower Farm, Beit Dagan, Israel. Electra® series
is by Harlan and Sue Cosner and is a product of the Paul Ecke Ranch, Encinitas,
California. Lasting Impressions™, Sunshine™, Pot O' Gold™ and
Twice as Nice™ series are products of Mikkelens, Inc., now owned by
Oglevee, Ltd. Liberty and Patriot are products of Dümmen USA, Vancouver,
Washington. Java™ and Spectra™ series are products of PanAmerican
Seed Company, West Chicago, Illinois. |
||||||
Insect and Related Pests
The main pest problems of New Guinea
impatiens are the two-spotted spider mite, cyclamen mite, and western flower
thrips. Western flower thrips is the most serious pest on New Guineas, as they
serve as a vector for Impatiens Necrotic Spot Virus (INSV; formerly called
Tomato Spotted Wilt Virus), a destructive disease. Thrips can spread this virus
to susceptible species throughout a greenhouse, including New Guinea impatiens,
garden impatiens, gloxinias, cyclamen, gerbera daisies, and many other
floricultural crops. Careful routing of infected plants, monitoring of sticky
cards, frequent inspection of flowers to check for the presence of thrips, and
thorough spraying are essential in controlling thrips and INSV.
Other insects that can be a problem include fungus gnats, mealybugs, and aphids. Consult the current year's N.C. Agricultural Chemical Manual for suggested control measures for all of these pests.
Diseases
Impatiens Necrotic Spot Virus is the most
serious disease on New Guinea impatiens. It starts as foliar and stem lesions
and eventually destroys the marketability of plants. The only control is
prevention via purchasing plants from reliable propagators, rouging infected
plants, and control of the vector, western flower thrips.
Botrytis blight can be a serious disease on New Guinea impatiens. Too cool night temperatures and / or too high relative humidity can increase the severity and incidence of Botrytis, so maintain at least 62 °F night temperatures and vent to reduce humidity in the greenhouse whenever possible. The other major above-ground disease is Rhizoctonia stem rot and web blight.
Root rot caused by Pythium spp. or Phytophthora spp. also affect New Guinea production. Avoid overwatering plants as a water-soaked substrate can increase the incidence of root rot. Consult the current year's N.C. Agricultural Chemical Manual for control measures for the diseases mentioned above.
For Further Information
Contact your County Cooperative
Extension Center for related Horticulture Information Leaflets, Ornamental
Disease Notes, and Ornamental and Turf Integrated Pest Management Insect Notes.
Also consult the current edition of the N.C. Agricultural Chemicals Manual for
pest and disease control recommendations. Other general information sources on
New Guinea impatiens production used in the development of this handout
include:
Published by the North Carolina Cooperative Extension Service
Distributed in furtherance of the Acts of Congress of May 8 and June 30, 1914. Employment and program opportunities are offered to all people regardless of race, color, national origin, sex, age, or disability. North Carolina State University at Raleigh, North Carolina A&T State University, U.S. Department of Agriculture, and local governments cooperating.
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