Four Star Culture Guide - 2019 - 14

BIDENS

Campfire™, Goldilocks Rocks®
NUTRITION
pH: 5.8 - 6.2
EC: (2:1 extraction method) .6 - .9
Constant feeding at 150ppm - 200ppm nitrogen with a
fertilizer selected for grower's water quality and soil mix is
recommended.

GROWTH REGULATORS
If required for Goldilocks Rocks, B-Nine® (daminozide) can be
applied as a spray at 2,500ppm, or a light spray application of
Sumagic® (uniconazole) at 5ppm. Caution should be taken using
Sumagic with Goldilocks Rocks, as it is quite responsive to the
PGR. Repeated PGR sprays can lead to flower delay.

TEMPERATURE
Rooting out: 65 - 72 F
Growing on: 58 - 68 F
Holding: 50 - 60 F

Fireburst is more similar in vigor to Goldilocks Rocks. Fireburst
can be finished in all container sizes. B-Nine applied as a spray
at 2,500ppm or Sumagic also at a spray at 5ppm are effective.
Cooler and drier growing conditions will produce a more
compact and fuller plant.

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 at cooler temperatures. Severe
dry downs will produce lower leaf yellowing.
TIMING
4" - 5"/Grande™: 4 - 6 weeks with one 104 cell plant.
6"/1GL Royale™: 5 - 7 weeks with one 104 cell plant.
8": 5 - 9 weeks with one to two 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 three to four weeks after
planting.
LIGHT/LIGHTING
These plants should be grown in a high light area of the
greenhouse for optimal flowering and plant development.
Goldilocks Rocks® flowers first, followed by Campfire® Fireburst.
Goldilocks Rocks can be used in earlier production, while
Campfire Fireburst will flower for peak week sales.

PEST and DISEASE MANAGEMENT
There should be little instance of disease if basic cultural
guidelines are followed. Proper temperature, light levels, and
water management will eliminate most disease issues. A
broad spectrum fungicide such as Banrot® (etridiazole plus
thiophanate-methyl) can be applied at transplant, if desired.
In poor growing conditions, Botrytis or Powdery Mildew can
develop. Whiteflies, Thrips, and Aphids can be pests of concern.
OUTDOOR GROWING SCHEDULE
Both Bidens varieties can be grown outdoors in the third
earliest spring conditions (approximately frost, or late April in
Michigan), if frost protection is provided. This recommendation
is based on average spring weather and should be adjusted for
unseasonably severe or unseasonably mild conditions.
OTHER TIPS
* Goldilocks Rocks and Campfire Fireburst can be finished in
small containers up to 10" mono baskets. They also perform
well in combinations, when used with average to below
average vigor component plants.
* Proper soil pH levels should be maintained. Iron deficiency
symptoms can develop in high pH situations. Also, if soil
pHs reach 5.5 or lower, dark foliage color and plant stunting/
distortion can occur.
* Please note the warmer recommended rooting out
temperatures. If possible, follow these for the first 7 - 14
days before lowering to growing on temperatures.
* Both varieties can have flowering delay in dark and cool
conditions, so supplemental lighting to 14 hours/daylength
can help.

Four Star Greenhouse I www.pwfourstar.com I 734-654-6420
14

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

Table of Contents for the Digital Edition of Four Star Culture Guide - 2019