Dendrobium tetralobum

Also known as: The 4 in the subfamily: Epidendroideae

General Information

The 4 is a sympodial orchid belonging to the sub family Epidendroideae. The name refers to the lip apex.

Plant Description

Sympodial. Grows to 102cm. Each new growth has numerous arching lance shaped leaves that grow to 2.5cm long. Pseudobulbs grow to 102cm. The plant forms pendant or arching growths

Substrate(s)

• Coarse

Climate

Grows at low elevations. Rainfall ranges from 132mm to 231mm per day, heaviest in September and lightest in April. Humidity ranges from 77% to 83%, highest in November and lowest in March. Temperature ranges from 23C to 30C, highest in August (23C to 30C) 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.