Four Star Culture Guide - 2019 - 6

ARGYRANTHEMUM
Butterfly

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.
TEMPERATURE
Rooting out: 65 - 72 F
Growing on: 62 - 68 F
Holding: 45 - 50 F
WATERING
Maintain moderate soil moisture. 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. To
avoid lower leaf soft rots in lower light, cooler temperatures,
or higher humidity situations, water early in the day, if needed,
to avoid prolonged exposures of water on lower foliage. If
watering from overhead in poor growing conditions, make sure
to supply good air movement to avoid fungal/bacterial diseases.
TIMING
4" - 5"/Grande™: 4 - 5 weeks with one 52 cell Supernova® or
104 cell plant.
6"/1GL Royale™: 6 - 7 weeks with one 52 cell Supernova or
104 cell plant.
8": 7 - 9 weeks with one 52 cell Supernova or 104 cell plant.

PLANTING
All Argyranthemum liner plants should be planted into a welldrained 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. When using
Supernova treated liners, NO pinching is required. If 104 Liners
are used in 1GL Royale containers planted 1ppp, they should be
pinched, and larger containers planted either 1ppp or multiple
plants per pot should also be pinched. Butterfly liner trays can
dry out quickly and should be planted as soon as possible, or
extra watering care should be devoted to them.
LIGHT/LIGHTING
Argyranthemums should be grown in a high light area of the
greenhouse for optimal flowering and plant development.
Supernova Liners have been treated for earlier flowering
and will not require additional grower lighting. If very early
crops are scheduled well before the onset of 12-hour natural
daylengths, daylength extension lighting is helpful. Also, if
growing from 104 Liners, additional lighting to 14 hours/day
lighting is required for early spring to mid-spring finish dates,
and additional PGR treatments will be required, in comparison
to plants grown from Supernovas.

Supernova 52 Liners are used at Four Star and are
recommended for best flower timing, flower count,
and plant size in smaller containers. If 104s are used for
spring production, supplemental lighting, additional crop time,
pinching, and additional PGR applications are often required to
achieve desired results.

Four Star Greenhouse I www.pwfourstar.com I 734-654-6420
6

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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