Four Star Culture Guide - 2019 - 40

NEW GUINEA IMPATIENS
Infinity®

NUTRITION
pH: 6.0 - 6.5
EC: (2:1 extraction method) .2 - .6
Constant feeding at 100ppm - 150ppm nitrogen with a
fertilizer selected for grower's water quality and soil mix is
recommended. Or, once the plants are rooted and actively
growing, feeding once per week at 200ppm nitrogen can be
done with clear water used only for other irrigations.

PLANTING
Supernova 50 Liners and 104 Liner plants should be planted at
or slightly deeper than the liner cell level into a well-drained
soil mix selected to match individual water quality and fertilizer
blends. Water in thoroughly without saturating and keep a
constant moderate moisture level for the first seven to 10 days
to establish roots. Pinching should not be needed, except for
taller material at time of planting.

TEMPERATURE
Rooting out: 65 - 72 F
Growing on: 65 - 75 F
Holding: 65 - 68 F

LIGHT/LIGHTING
Infinity® should be grown in a moderate light area of the
greenhouse for optimal plant development and flowering.
Growing in a more shaded area will produce taller and softer
growth that is less attractive and more disease prone.
Additional lighting for flowering is not required.

WATERING
Maintain moderate soil moisture levels. Allow the soil to cycle
from moist to slightly dry. Avoid both severe dry downs/wilting
and long periods of wet soil, especially at cooler temperatures.
Growing slightly drier will shorten flowering time for the crop.
Plants can be allowed to show slight signs of moisture stress
before watering. When watering, do so lightly so moisture
reaches the bottom of containers, but not to the point of
saturating the soil. This practice can also be used to help "hold"
plants. Avoid severe plant dry downs to avoid flowering
delay or bloom loss.
TIMING
4" - 5"/Grande™: 6 - 7 weeks with one Supernova® 50 cell plant.
6"/1GL Royale™: 8 - 9 weeks with two Supernova 50 cell plants.
8": 8 - 10 weeks with two to three Supernova 50 cell plants.
10" Hanging Basket: 11 - 13 weeks with four to five 104 cell
plants.
Supernova 50 liners are used at Four Star and are
recommended for best flower timing, flower count, and
plant size in smaller containers. If 104 Liners are used for
spring production in smaller containers, additional crop
time will be required - expect two weeks longer crop time
on average.

GROWTH REGULATORS
In most cases, no PGR applications should be required. Only
if required, use a light spray of Bonzi® (paclobutrazol) at
1ppm - 2ppm. Moderate soil moisture growing practices and
controlling fertilizer levels can be very helpful at managing plant
size and encouraging flowering. Infinity Orange Frost and Pink
Frost are good indicator plants for possible PGR needs to the
Infinity varieties.
PEST and DISEASE MANAGEMENT
There should be little instance of disease if basic cultural
guidelines are followed. Provide adequate space, humidity
control, and air movement to prevent Botrytis and other
fungal disease. Avoid long periods of moisture on the foliage,
especially in poor weather conditions. Thrips, Aphids, Spider
Mites, and Fungus Gnats can be pests of concern. Broad
or Cyclamen Mites can also affect new growth and plant
development. Scout specifically for Thrips. They can
spread INSV (Impatiens Necrotic Spot Virus).

Four Star Greenhouse I www.pwfourstar.com I 734-654-6420
40

The rates and chemicals listed are based on our southeast Michigan growing conditions, and are not recommended for nationwide application.
Please adjust the rates and spray applications to your location and facility.

http://www.pwfourstar.com

Four Star Culture Guide - 2019

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