Spathoglottis (Garden Orchids)
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 or an interesting warm season 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 greenhouse conditions, plants will flower well at 1,500 to 2,500 foot candles.
Water: Keep plants evenly moist. They will tolerate some drying periodically but prefer even moisture. Over watering can cause root or crown rots.
Media: 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. Most Spathoglottis have a vigorous root system and require standard or deep containers. Azalea pots or bulb pans are not recommended since they tend to hold excessive moisture.
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 rarely survive freezing temperatures.
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: Botrytis flower mold, Anthracnose. Root and/or Crown rot if over watered or grown in poorly drained media.
Tips: You can expect flowering 5 to 7 months after planting a single tissue cultured young plant in a 5 to 6” 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.
This text is a recommendation only; it is not an endorsement of any products or acceptance or any liability as a result of usage.
Updated: 1.03.2013