Four Star Culture Guide - 2019 - 34

LOBULARIA

Knight®, Princess®
NUTRITION
pH: 5.8 - 6.2
EC: (2:1 extraction method) .6 - .9
Constant feeding at 200ppm nitrogen with a fertilizer selected
for grower's water quality and soil mix is recommended. Do not
grow hungry as a form of natural PGR treatment. Hungry plants
will develop yellow lower leaves.
TEMPERATURE
Rooting out: 65 - 72 F
Growing on: 55 - 65 F
Holding: 50 - 60 F
WATERING
Maintain moderate soil moisture. Allow the soil to cycle from
moist to moderate levels. Avoid both severe dry downs/wilting
and long periods of wet soil, especially at cooler temperatures.
Growing too dry or wilting will cause leaf yellowing and
leaf drop. Large monoculture baskets and containers require
above average watering frequency.
TIMING
4" - 5"/Grande™: 4 - 5 weeks with one 104 cell plant.
6"/1GL Royale™: 5 - 6 weeks with one 104 cell plant.
8": 6 - 8 weeks with one 104 cell plant.
10" - 12" Hanging Basket: 8 - 10 weeks with three to four
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 usually will not be needed,
except possibly in the case of plants grown too warm, grown
without use of PGRs, or when used in larger containers. This
second pinch can be given for larger containers, usually three to
five weeks after planting.

LIGHT/LIGHTING
These plants should be grown in a high light area of the
greenhouse for optimal flowering and plant development.
Knight® and Princess® Lobularia flower very freely and
supplemental lighting should not be required for early spring
flowering.
GROWTH REGULATORS
Both Bonzi® (paclobutrazol) and Sumagic® (uniconazole)
are effective for controlling growth. These materials can be
used either as a light spray or drench. Knight and Princess
Lobularia are all vigorous compared to most plants, but the vigor
does vary within the five varieties. To best grow, water, and
treat with PGRs, the following grouping should be helpful.
1) Snow Princess® and Blushing Princess® - Sumagic
sprays at 5ppm - 10ppm applied lightly. First application
made seven to 14 days after planting and reapplied as
needed. Or, a Bonzi drench at 1ppm - 3ppm can be made
seven to 14 days after planting. Treatments for larger
containers can be made when a desired "pre-finished" size
is attained (three to four weeks after planting).
2) Dark Knight™, Frosty Knight® and White Knight® -
Sumagic sprays at 5ppm applied lightly. Applications should
be made based on plant development and should be used on
an "as needed" basis. Or, a Bonzi drench at 1ppm can be made
14 days after planting. These three varieties start much slower
compared to the two Princess varieties and plants should
reach the "pre-finished" size before applications are made.
Left untreated they will often attain nearly the same size as
the Princess varieties. Treatments for larger containers can
also be made when a desired "pre-finished" size is attained
(two to four weeks before scheduled finish date).
Even the two Princess varieties are quite responsive to
Bonzi and Sumagic applications. It's best to try the lower
recommended rates first and adjust as needed. When spraying,
be sure to apply lightly - only a misting leaf coverage instead
of heavy spray. With drenches, use the lower rate and be
certain to also apply only the recommended amount of solution
to each container. To reduce PGR needs, grow cool/cold to
produce a much fuller and compact plant with deep green
foliage.

Four Star Greenhouse I www.pwfourstar.com I 734-654-6420
34

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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