Zygopetalum mackayi

General Information

Zygopetalum mackayi is a medium to large sized sympodial cool to warm growing epiphytic or terrestrial orchid belonging to the sub family Epidendroideae.

Plant Description

Sympodial. Grows to 36-58cm. Each new growth has numerous leathery leaves that grow to 5-50cm long. Pseudobulbs grow to 3-8cm

Flowers

Numerous long lasting, fragrant blossoms appear

Fragrance

The orchid is fragrant.

Substrate(s)

• Coarse
• Medium
• Fine
• Bark
• Perlite

Care Notes

These orchids like to be watered regulary, especially during warm weather, and prefer a well draining mix or also do well mounted, provided they can be watered daily or even many times a day.

These are quite a forgiving orchid, there are no special requirements to get this orchid to flower, just good care and consistent conditions. Larger plants may be more fussy and can react poorly to change; a poorly timed repotting, a pest infection or an unusually hot day can set them back for a couple of years. However, even plants that have been treated poorly can thrive, and if they are set back they often recover much stronger then they would otherwise be.

Fragrant:

• IsFragrant

Climate

Grows at high elevations. Rainfall ranges from 38mm to 239mm per day, heaviest in June and lightest in January. Humidity ranges from 73% to 83%, highest in August and lowest in February. Temperature ranges from 8C to 23C, highest in August (14C to 23C) and lowest in January (8C to 16C).

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.

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. Be sure to flush out excess fertiliser by running water through the media regularly year round. Apply fertiliser regularly at half strength year round. Use a low Nitrogen fertiliser year round. Use a high Phosphorous fertiliser year round. Reduce fertiliser when plant is dormant during Spring.

Potting

This orchid prefers a fine, well draining media. Avoid commercial potting mixes as they may have 'wetting agents' that retain water for too long. A simple mix made up of 20% sand, 50% peat or moss, with the remaining 30% made up of decomposed bark and leaf litter would be adequate. Adding some charcoal to the mix will also help it last longer.

Repotting depends on how wet the media is usually. Every 2-3 years would suffice, or whenever the media shows signs of clumping, staying wet for too long, or smells foul.