Dendrobium acutisepalum

Also known as: The Acute Sepal Dendrobium or Sayeria acutisepala in the subfamily: Epidendroideae

General Information

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

Plant Description

Sympodial. Grows to 60-80cm. Each new growth has numerous erect elliptic leaves that grow to 8cm long. Pseudobulbs grow to 60-80cm

Substrate(s)

• Bark
• Treefern
• Spaghnum Moss

Climate

The orchids are well adapted for hot weather, accompanied by sporadic, unpredictable rainfall and a generally dry climate. They can tolerate a lot of neglect as they are quite used to it, however they can be prone to underwatering and may collapse in cold, wet weather.

For this reason it's best to dedicate a sheltered, protected area for them where the watering can be controlled, such as a corner of a greenhouse or in a sheltered balcony. They can also do well hung near the roof of a shadehouse or sheltered greenhouse where they receive the extra heat but not as much water as other plants. 

Grows at high elevations. Rainfall ranges from 48mm to 175mm per day, heaviest in September and lightest in February. Temperature ranges from 7C to 18C, highest in October (10C to 18C) and lowest in January (7C to 15C).

Watering

These orchids prefer a wet-dry cycle between waterings, they should be watered frequently but only when the moisture is approaching dryness, where the pot feels light and/or the media looks dry. Keep an eye on mounted orchids in warm weather as they may dehydrate quickly.

Be sure to provide strong air circulation after watering to prevent fungal and bacterial infections from water sitting on leaves.

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.

Apply fertiliser regularly at half strength year round.

Potting

Use water retentive media such as moss to prevent roots from drying out quickly This plant does well mounted.