Spathoglottis is a genus of tropical, terrestrial orchids with 40+
species. The foliage is palmlike with showy flower spikes producing successive flowering
over time. Flower colors range from purple to yellow to white. Sometimes referred to as
"Garden Orchids", Spathoglottis offer year round color in landscape ground beds
in warm climates as well as an interesting summertime flowering patio plant for cooler
climates.
 LIGHT
Spathoglottis will grow well under light shade to
full sun conditions. Foliage color and appearance is best when grown under 30 to 73% saran
cloth. Under glasshouse conditions, plants will flower well at 1,500 to 2,500 foot
candles.
WATER
Keep plants evenly moist. They will tolerate some
drying periodically. Over watering may cause fungal problems, especially in young plants.
MEDIUM
Well-drained, fibrous peat based soil mix
incorporating at least 20% perlite or airlite. A mix of 60% peat, 20% perlite or airlite
and 20% bark should work well under most conditions. Spathoglottis have a vigorous root
system and require standard or extra deep containers. Azalea pots or bulb pans are not
recommended.
 NUTRITION
Spathoglottis are fast growing and require a higher
than average nutrient supply. Nutritional requirements will vary with light and
temperature conditions. Constant liquid fertilization at 150ppm Nitrogen works well. If
incorporating a slow release fertilizer, use up to 15 pounds per cubic yard.
However, be cautious with trace elements. Avoid repeated sprays with trace
element mixes, Manganese and Iron can accumulate and cause
phytotoxicity.
TEMPERATURE
As a tropical plant, Spathoglottis require daytime
temperatures above 75° F and nights above 60° F for vigorous growth and flowering.
Plants may drop leaves and go dormant with extended temperatures below 40° F.
Spathoglottis will not tolerate freezing.
PESTS
Susceptible to most common pests; however, no
particular pest seems to pose serious problems. Watch for spider mites under greenhouse or
interior conditions.
DISEASES
Botritis flower mold, anthracnose. Crown rot if
over watered.
TIPS
You can expect flowering 5 to 7 months after
planting a single tissue cultured young plant in a 5 to 6 inch pot. Allow 7 to 9 months
for a full 8 inch pot. Spathoglottis can be grown with very close spacing in the nursery
without compromising quality. Upon maturity, plants will bloom relatively non-stop
provided warmth, bright light, and good nutrition. Flowers open a few at a time at the top
of the spike. Each spike can last for months.
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