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Logee’s
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from
the growers
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Cultural Information – Costus
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our Costus department
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Light:
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Full sun, partial sun or shade on some varieties
(southern, eastern, western or even a northern exposures if the plant
is grown close to the glass).
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Temperature:
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As a potted plant, maintain indoor temperatures
above 60°.
They will tolerate temperatures much lower however this can slow
growth and flowering.
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Humidity:
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Maintain humidity at 50% or higher lower levels
will do no harm for short periods.
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Watering:
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Bring soil to a state of visual dryness between
watering. When watering thoroughly saturate the soil.
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Fertilizer:
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They are moderate feeders so a 1/4 tsp./gallon
once a week is a general recommendation. Under low light reduce the
frequency. Reduce feed during the winter. Use a balanced fertilizer
i.e. 15-15-15 or a blooming fertilizer like Pro Gro ‘Grow’ 7-9-5
or Electra 5-10-3.
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Pruning:
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Prune after flowering. Old “canes” or stems
can be pruned once they become rough looking. Once the flowering is
finished on a “cane” it will not bloom again but does add strength
to the new growth.
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Insects and
Disease:
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They have little problems with insects. C.
Cuspidatus is susceptible to mealy bug. Their root systems are rugged
resisting disease.
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Comments:
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Costus are easy to flower and vigorous growers.
They bloom under varying light condition. The two varieties we
grow are contained in their growth making them excellent for containers.
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