c
ulture onnection
c
short habits compared to many of when they are kept overly wet. bud stage (fl ower buds visible on
the other genetics on the market. the top of the plant), it takes approx-
Thus, plant growth regulators are Temperature and imately 40 days to bloom with a
not necessary to reduce stem elon- Scheduling 24-hour average temperature of 68°
gation in ‘After Eight’. The main factor infl uencing the F. The size of blooms and intensity
proper timing of Oriental lilies is of the fl ower color can be increased
Insects and Diseases temperature. Maintaining proper when they are grown slightly cooler
There are relatively few insects night temperatures during pro- during the last couple of weeks of
and diseases affecting the pro- duction is crucial; after they have production (60° F night/65° F day).
duction of Oriental lilies. Aphids, emerged, night temperatures below
fungus gnats and shorefl ies are the 59° F will greatly decrease crop Availability
insects observed most frequently performance and increase the time Oriental lily ‘After Eight’ and the
when producing Orientals inside to fl ower. Sunny series cultivars are available
greenhouses; growers producing During emergence, maintain from Zabo Plant USA (www.zabo
them outside may occasionally also soil temperatures of 55° F. After the plant.com) and 2Plant International
observe grasshoppers and lily leaf majority of the lilies have emerged, (www.2plant.com). They are available
beetles (Lilioceris lilii) feeding on usually within two weeks of pot- to the industry as 12/14-centimeter,
them. Botrytis (B. elliptica, B. lil- ting, it’s more important to monitor 14/16-centimeter, 16/18-centimeter
iorum and B. cinerea) is the primary and control the air temperature. and 18/20-centimeter bulbs.
GPN
foliar disease that infects Oriental Following emergence, maintain
lilies and fi rst appears as pale tan 24-hour average air temperatures Paul Pilon is a horticultural con-
spots on leaves, stems or petals; of 68° F. I recommend growers sultant, owner of Perennial Solu-
these spots enlarge rapidly and provide 65° F night and 70° F day tions Consulting (www.perennial-
often cause plant tissues to collapse temperatures. Cooler temperatures solutions.com) and author of Peren-
and the plants to blight. Botrytis dramatically delay crop develop- nial Solutions: A Grower’s Guide
can be prevented by keeping the ment, and warmer temperatures to Perennial Production. He can
of the media surface). Stem roots
foliage and fl owers as dry as pos- hasten development and most be reached at paul@perennial-
are the primary source of nutrition
sible using adequate plant spacing, often reduces the quality charac- solutions.com or (616) 366-8588.
and moisture uptake as well as sup-
providing adequate air move- teristics of the crop. Keep in mind
porting and anchoring the plant.
ment, avoiding overhead irrigation that colder night temperatures will
During emergence, uniform
while the plants are blooming, and adversely affect crop development.
moisture levels are important.
watering early in the day. Root rots At these temperatures, ‘After
LearnMore
The growing medium should be
For more information
caused by the pathogens Pythium Eight’ will take 12 to 13 weeks from
watered well after planting and
related to this article, go to
and Rhizoctonia are likely to occur potting to bloom. From the visible
www.gpnmag.com/lm.cfm/gp021004
kept uniformly moist thereafter.
Watering must be carried out spar-
ingly until they have emerged; the
soil should never be allowed to dry
out, while at the same time it must
not be kept too wet. The amount of
irrigation can be increased when
the shoots are 3-6 inches tall, as the
stem roots are usually well formed
at this time. When providing irri-
gation, water thoroughly and let
them dry out slightly between
watering. Once the fl ower buds are
8884:/(&/5"°64$0. '"--t8*/5&3t the new e-magazine for growers
visible, the growing media should
never dry out; overly dry conditions
Check out the newest issue of Cultivate from Syngenta for help
at this stage could cause the fl ower
throughout the production process. From genetics to pest management
buds to abort.
to mix handling, Cultivate contains information you can use now to
Oriental lilies are light to mod-
improve effi ciency and plant quality.
erate feeders. Early in production,
breeding
it is not necessary to apply fertil-
t
A new way to work with growersbreakthroughs
in geraniums
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Hybrid geranium breeding advances
hanging basket
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media
port shoot growth. As the plants
t
How to grow a great-looking Calliope
™
crop
grow
easy
gorgeous
reach 2-3 inches tall, fertilizers can
t
.FEJB
GPS
IBOHJOH
CBTLFUT
gerbera
blooms
be applied. Water-soluble fertil-
izers can be applied weekly using
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150- to 200-ppm nitrogen or with
a constant liquid fertilization pro-
Take a moment to enjoy Cultivate and fi nd greater success. Go to www.CultivateMag.com
gram using rates of 75- to 100-ppm
nitrogen with every irrigation.
One of the attributes of the
Brought to you by:
Sunny series cultivars are their
www.gpnmag.com February 2010 GPN 43
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