Four Star Culture Guide - 2019 - 51

PHLOX

Intensia®
NUTRITION
pH: 5.8 - 6.4
EC: (2:1 extraction method) .8 - 1.2
Constant feeding at 200ppm - 300ppm nitrogen with a
fertilizer selected for grower's water quality and soil mix is
recommended.

LIGHT/LIGHTING
These plants should be grown in a high light area of the
greenhouse for optimal flowering and plant development. Intensia
Phlox flower fairly early and lighting should not be needed for
regular season crops. Daylength extension lighting of 14 to 16
hours total daylength can be helpful for early finish crops.

TEMPERATURE
Rooting out: 65 - 72 F
Growing on: 55 - 68 F
Holding: 50 - 60 F

GROWTH REGULATORS
Moisture management alone is an effective method of
controlling growth. Not only does growing the Intensias "on the
dry side" produce the healthiest plants, it also produces fuller
and more compact plants. Intensias are quite responsive to PGRs
and care should be taken when making applications. A light
spray application of 2ppm - 5ppm Sumagic® (uniconazole), a
2,500ppm - 5,000ppm standard spray of B-Nine® (daminozide),
or a 1ppm Bonzi® (paclobutrazol) drench can be selected, as
needed. Blueberry may require a PGR treatment, while White
and Red may not. Watch for the "softening" look and lighter
green appearance of new growth as an indication for PGR
treatment needs. In more northern areas, the lower rates should
be used as a starting base, while in more southern areas, the
higher rates will probably be needed. Other materials such
as Topflor® (flurprimidol) and Piccolo® (paclobutrazol) can be
used at rates that correspond with the degree of treatment
recommended for Sumagic or Bonzi.

WATERING
Maintain moderate soil moisture. Allow the soil to cycle from
moist to dry. Avoid both severe dry downs/wilting and long
periods of wet soil, especially in cooler temperature, low light,
and high humidity conditions. Intensia® Phlox perform best if
grown drier than many crops.
TIMING
4" - 5"/Grande™: 4 - 5 weeks with one 104 cell plant.
6"/1GL Royale™: 5 - 7 weeks with one to two 104 cell plants.
8": 7 - 9 weeks with two to three 104 cell plants.
10" - 12" Hanging Basket: 9 - 12 weeks with three to five
104 cell plants.
PLANTING
The 104 Liner plants should be planted into a well-drained soil
mix selected to match individual water quality and fertilizer
blends. Water in thoroughly without saturating the mix and
maintain a constant moderate soil moisture level for the first
seven to 10 days to establish new rooting. Plants have already
been pinched and further pinching should not be needed, except
in the case of taller material at time of planting or a second
pinch on plants for larger containers. This second pinch can be
given for larger containers, usually two to three weeks after
planting.

Watering practices, weather, and greenhouse
environment can greatly affect plant growth and
performance.
PEST and DISEASE MANAGEMENT
Proper temperature, light levels, and water management will
eliminate most disease issues. Avoid darker, warmer, and
more humid areas with poor air movement. A broad spectrum
fungicide such as Banrot® (etridiazole plus thiophanate-methyl)
can be helpful when applied at transplant, if desired. Scout for
Fungus Gnat Larvae. A preventative Fungus Gnat treatment
could be considered.

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.

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Four Star Culture Guide - 2019

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