Another mystery plant

[estación seca]

If you repot, I would put some of the pine needle mulch on top of the lava rock. If the plant was harvested in the wild, that might have been its substrate, and the beneficial fungi and bacteria might be in there.

How hot are your summer nights? Are you in a lower-elevation area, foothills or mountains?

[Roberta]

My A. alpinum is a summer/fall bloomer, A. giganteum in the spring. A. alpinum is mounted (now growing around the back side of the mount) and A. giganteum is in a basket with minimal media, mostly for containment since it is too big to maintain on a mount. I grown both outside in coastal southern California USA, so for temperature they get whatever Mother Nature throws their way. A. giganteum especially is a hummingbird magnet Roberta's Orchids

IDs seem to be pretty fluid - I'm pretty sure of A. giganteum, it has a distinctly different inflorescence, size and different leaf, but A. alpinum could easily be one of the others.

[mexicowpants]

Originally Posted by estación seca

If you repot, I would put some of the pine needle mulch on top of the lava rock. If the plant was harvested in the wild, that might have been its substrate, and the beneficial fungi and bacteria might be in there.

Ooh, good idea, I hadn't thought of that.

Originally Posted by estación seca

How hot are your summer nights? Are you in a lower-elevation area, foothills or mountains?

We're inland, at an elevation of around 1600m. Nighttime low temperatures are averaging 16°C right now, but can be as warm as 20 or 21°C on occasions during June and July. Fortunately where we live there's usually a breeze, which helps to make it feel a little cooler.
Daytime temperatures can get up to 35°C on the hottest days in June and July, this is why I've given up trying to keep Miltoniopsis.

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