Dendrobium clausum

Also known as: The Closed Dendrobium in the subfamily: Epidendroideae

General Information

The Closed Dendrobium is a sympodial warm growing orchid belonging to the sub family Epidendroideae.

Plant Description

Sympodial. Grows to 30-40cm. Each new growth has numerous elliptic leaves that grow to 4.6-7.1cm long. Pseudobulbs grow to 30-40cm

Flowers

Numerous self pollinating blossoms appear

Substrate(s)

• Coarse

Climate

Grows at low to high elevations. Rainfall ranges from 61mm to 178mm per day, heaviest in September and lightest in November. Humidity ranges from 74% to 82%, highest in January and lowest in June. Temperature ranges from 15C to 28C, highest in May (18C to 28C) and lowest in January (15C to 26C).

Watering

These orchids are sensitive to excessive watering and should only be watered when they look thirsty. Water infrequently and ensure that the roots are dry before watering. Keep an eye on them especially during hot weather as overwatering can lead to rot, whereas underwatering may result in wilting or shriveling, which while unattractive, will not kill the plant.

Keep moisture levels up during hot weather as the plant is prone to dehydration

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. Reduce fertiliser when plant is dormant during Spring.