Growing Masdevallias indoors and in greenhouses
Compact, colourful, and often delightfully unusual, Masdevallia is a rewarding group of orchids for growers who can provide consistently cool, humid and airy conditions. Their striking triangular flowers – formed from fused sepals – come in vivid shades and striking patterns, making them some of the most eye-catching orchids in cultivation. While they may have a reputation for being demanding, success lies in understanding their cloud-forest origins and adapting your growing environment to suit their needs.
OVERVIEW
The genus Masdevallia comprises around 650 recognised species, primarily distributed across the high-elevation cloud forests of the Andes in Colombia, Ecuador, Peru, and Bolivia, with a number species extending north through Central America and east across northern South America and Brazil. These habitats are typically cool, misty, and humid year-round, and differences in altitude mean that species fall broadly into two cultural groups: cool-growing high-mountain types (e.g. Masd. coccinea, Masd. veitchiana) and intermediate cloud-forest types (e.g. Masd. floribunda, Masd. infracta). Only a few species are found in warm, low-elevation habitat.
Masdevallia coccinea alba
Masdevallias are sympodial orchids without pseudobulbs, producing clusters of fleshy leaves from short rhizomes. Because they lack water-storage organs, they are highly susceptible to drying out but at the same time are intolerant of stagnant conditions around the roots. Their growth cycle is not strongly seasonal, but many species follow a rhythm of producing new leaves and roots continuously, with flowering occurring any time of year depending on species and culture. Leaves may produce more than one inflorescence in their lifetime, and inflorescences may flower repeatedly so should not be removed until they turn yellow.
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Masdevallia Gypsy
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Masdevallia Cassiope
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CARE ESSENTIALS
■ Light
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Bright, diffuse light similar to that for many paphiopedilums; approximately 1,000–2,000 foot-candles.
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East-facing or well-shaded south-facing windows work well.
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Avoid direct midday sun, which quickly overheats and damages leaves.
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Supplemental lighting in winter improves vigour and flowering consistency.
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Leaf colour guide: medium green = ideal; dark green = too little light; yellowish or leathery = excess light or heat.
■ Temperature
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Cool-growing species – ideal daytime range 10–18°C; night-time 7–12°C.
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Intermediate species – daytime 15–22°C; night-time 10–15°C.
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All masdevallias benefit from a marked night-time drop of 5–10°C, reflecting their natural mountain environments.
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Avoid temperatures above 24–26°C for extended periods, as heat stress is the most common cause of plant decline.
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In winter, maintain temperatures toward the lower end of each species group but avoid freezing conditions.
■ Watering and humidity
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Keep evenly moist at all times – masdevallias lack storage organs and should never dry out completely, nor remain wet.
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Water with rain, RO, or distilled water as far as possible; occasional tap water is acceptable.
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Humidity should be 70–90%, with strong, fresh airflow (especially during winter or in low light conditions) to prevent fungal issues.
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In winter, continue to water but reduce frequency slightly if growth slows.
■ Fertilising
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Feed weakly, weekly during active growth with a balanced orchid fertiliser.
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Reduce feeding by half in winter or under low light conditions.
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Flush pots frequently with pure water to prevent salt buildup, which can scorch roots and leaf tips.
■ Potting and repotting
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Potting medium: fine bark with sphagnum moss or pure long-fibre sphagnum; ensure excellent drainage and airflow otherwise roots will quickly rot.
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Repot every 1–2 years, before the medium starts to break down.
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Best time: during early active root growth.
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Keep divisions small – masdevallias often flower better when slightly pot-bound.
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Some species are better grown mounted, particularly those in subsection Saltatrices, but will decline quickly if conditions are less than ideal.
Masdevallia Kimballiana
SUMMARY
Masdevallias have some of the most extraordinary and colourful blooms in the orchid world, but they are not suitable plants for beginners. Their successful cultivation hinges on replicating the cool, humid, and softly lit conditions of their cloud-forest homes. With this approach you can maintain healthy plants and be rewarded with frequent flowering. With the right balance of moisture, airflow, and temperature control, masdevallias become some of the most captivating orchids to grow, whether in a cool section of a greenhouse or an indoor temperature-controlled terrarium.