Dendrobium rumphiae

Also known as: Cadetia crenulata Dendrobium dubium Dendrobium alexisense Cadetia bigibba Cadetia angustifolia in the subfamily: Epidendroideae

General Information

Dendrobium rumphiae is a sympodial hot growing orchid belonging to the sub family Epidendroideae.

Plant Description

Sympodial. Grows to 5.5-10.5cm. Each new growth has numerous erect lance shaped leaves that grow to 5cm long. Pseudobulbs grow to 2-6cm

Substrate(s)

• Coarse

Climate

Grows at low elevations. Rainfall ranges from 245mm to 506mm per day, heaviest in December and lightest in May. Temperature ranges from 23C to 32C, highest in May (24C to 32C) and lowest in January (23C to 28C).

Watering

These orchids prefer a constant supply of moisture, with a slight drying out between waterings. Saucers can be placed under pots to retain moisture during hot weather, however the saucers should be removed or let to dry every 1-2 weeks to prevent rot. Keep an eye on the plant especially in hot weather and look for cues of under/overwatering and adjust accordingly.

Fertiliser

Apply liquid based fertiliser per recommended directions. They can benefit from a high phosphate fertiliser leading up to flowering season, followed by a high nitrogen fertiliser when new growth appears, and a balanced fertiliser in other times. These orchids can also tolerate slow release fertiliser applied 1-2 pellets per cup (250ml) of media.

Use balanced fertiliser year round. Apply fertiliser regularly at half strength year round.

Potting

Use water retentive media such as moss to prevent roots from drying out quickly