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Conservatory Greenhouse

Maxillaria praestans

An epiphytic, evergreen orchid producing a clump of small, elliptic, 2-9cm tall and 1-3cm wide pseudobulbs. Each pseudobulb carries one, 10-40cm long and 1-5cm wide, leathery leaf. In summer, flowering stems emerge from the axils of papery sheaths and pseudobulbs. Each stem up to 12cm long carries a single, fragrant flower. Long-lasting flowers measure 6cm across. Petals and sepal are yellow with brown, striped markings and dark, almost black lip

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Ultimate height

0.1–0.5 metres

Time to ultimate height

5–10 years

Ultimate spread

0.1–0.5 metres

Moisture

Well–drained, Moist but well–drained

pH

Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Partial shade

Aspect

East–facing or North–facing or West–facing

Exposure

Sheltered

Hardiness
Hardiness ratings
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H1a: under glass all year (>15C)
H1b: can be grown outside in the summer (10 - 15)
H1c: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20)

H1B

Botanical details

Family: Orchidaceae
Native to GB / Ireland: No
Foliage: Evergreen
Habit: Clump forming
Genus: A large, diverse genus of mainly epiphytic, tropical orchids, producing a clump of small, elliptic or egg-shaped pseudobulbs. Pseudobulbs are thickened basal parts of stem, serving as a storage of water and nutrients
Name status: Correct
Plant range: C America

How to grow

Cultivation

Grow in an open, free-draining, medium-grade, bark-based orchid mix with addition of perlite, sphagnum moss or coir. Requires day temperatures around 18-20°C and 14-16°C at night. Provide good light levels, but avoid direct sunlight. Water plants thoroughly when compost is almost dry, allow to drain and use orchid fertiliser regularly during growing season. See also indoor orchid cultivation

Propagation

Propagation by seed is only possible in a controlled laboratory environment. Mature plants may be divided in early or mid spring, when the plant overgrows its container. Each division should have at least 3-4 healthy, older pseudobulbs with a sufficient amount of stored energy and water, to support new growth and reduce stress after repotting

Suggested planting locations and garden types

Houseplants
Conservatory and greenhouse

Pruning

No pruning required

Pests

May be susceptible to aphids, glasshouse red spider mite, scale insects and mealybugs

Diseases

Generally disease-free. Poor air movement and soggy potting mix may cause risk of bacterial infections

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