Grammatophyllum martae Quisumb. ex Valmayor & D.Tiu
Color: Green with dark brown
Bloom Time: Summer
Grammatophyllum martae is an orchid with large pseudobulbs up to 9 inches (22.5) cm tall and up to 4 inches (10 cm) in diameter. Leaves are at the apex of the pseudobulb, up to 2 feet (60 cm) long and up to 4 inches (10 cm) wide. The inflorescences grow up to 5 feet (1.5 m) long and carry about 80 dark brown flowers with yellow markings. The flowers are up to 1.8 inches (4.5 cm) across and appear in summer.
USDA hardiness zone 10a to 11b: from 30 °F (−1.1 °C) to 50 °F (+10 °C).
How to Grow and Care
Grammatophyllums grow well in moderate light intensity. The morning sun is best, until about noon. Observation of the leaf structure can be your best guide to the correct light conditions for which a type is particularly suited. Lime green-colored foliage is an indication of proper light. While very attractive, dark green foliage is not conducive to the plant reaching its full blooming potential. Yellow-colored foliage indicates too much light. In very mild climates, most members of this can be grown out of doors, with protection from the hot summer sun and winter colder nights.
The ideal annual temperature range for most members of the genus Grammatophyllum are 75 to 85 °F (24 to 30 °C) during the day and 55 to 60 °F (13 to 16 °C) at night. Plants will tolerate temperatures to 45 °F (10 °C) and up to 100 °F (38 °C) for short periods. At higher temperatures, air circulation and humidity must be increased, or damage can occur.
See more at How to Grow and Care for Grammatophyllum.
This species is found only in Negros in the Philippines.
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