Paphiopedilum delenatii

Paphiopedilum delenatii
(Terrestrial/lithophytic orchid, lot of 15 in vitro plants)
1. Identification and Origin
 
 
Scientific name: Paphiopedilum delenatii Guillaumin
 
 
Origin: Vietnam, where it grows in humid and shaded forests, often on limestone cliffs or in rocky areas, between 800 and 1,500 m in altitude.
 
 
Natural habitat: Lithophytic or terrestrial, in well-drained environments rich in organic matter.

3. Cultivation Conditions (Lot of 15 in vitro plants)
Temperature
 
 
Day: 20–25°C.
 
 
Night: 15–18°C (a moderate drop promotes growth).
 
 
To avoid: <12°C or >30°C.

Humidity
 
 
Ideal rate: 70–80%.
 
 
Tip: Maintain constant humidity, especially during active growth. Use a misting system for the in vitro plantlets.

Light
 
 
Intensity: Filtered to low light (north window or dense shading in a greenhouse).
 
 
To avoid: Direct exposure to the sun.

Watering
 
 
In vitro: Keep the medium slightly moist, avoid standing water.
 
 
Post-deflasking / Post-transplanting: Regular watering, allow the substrate to dry out slightly between waterings.

Fertilizer
 
 
In vitro: Diluted nutrient solution (1/4 dose) every 2 weeks.
 
 
Post-deflasking / Post-transplanting: Balanced orchid fertilizer (1/2 dose) during active growth.

Ventilation
 
 
In vitro: Light air circulation to prevent mold.
 
 
Acclimation: Gradually increase ventilation after transplanting.

Repotting
 
 
Substrate: Draining mix (fine bark, perlite, charcoal, and a bit of limestone to mimic its natural habitat).