bulbophyluñ jacobsonii

[Adrianna]

Hello all,

Please if someone can help me with the bulb. Jacob....first it was a baby when i bought the plant from Germany, but a year has past and nothing...i figured out that it needs at night a colder temp.18 degrees and duringbthe day at 24 degrees... but well...nothing even worst two leafs were gone yellow and died..i moist the soil more or less 80% and the bulbs look like dry... i know there is a dry period in a year but i don´t know when..

Well the thing is that i have not find any indication on how to take care of the orchid..

If you can help me...

[King_of_orchid_growing:)]

In the wild, Bulbophyllum jacobsonii grows on trees.

In cultivation, one of the many ways many growers grow certain Bulbophyllum species is by getting a piece of cork bark, (which you can purchase from many orchid specialty stores), getting some sphagnum moss strands, and putting a thin layer of moss on top of the cork bark then placing the orchid on top of the moss. You can tie them all together in place using fishing line.

This is called mounting an orchid.

There is a section here on the OB for such things.

[Bud]

this plant is originally found in equatorial areas of Sumatra and the Philippines. This does not have a winter rest period. So I dont know where you got the information that this needs to be grown in a cold environment. The coldest that the Philippines have in December is 65F til mid-January...otherwise they range from 80 to 105F ...only two seasons: monsoon rains and dry hot humid summers...

[msaar]

Bulb. jacobsonii is a synonym for Bulb. plumatum. According to Bill Thoms book, it blooms throughout the year, and he lives in central Florida-this implies no rest and warm temps.

[Adrianna]

Thanks a lot.
When i received the orchid the first think i did was mounting it on sphagnum i followed a orchid book...until now the orchid had been constantly in a 24 degrees (centigrades) with the other orchids (phals) and well ..it has grown leafs but not flowers, and someone in a forum told me to put it at night in the cold more or less 15 centigrades..and it is worse.

So i will study the weather in Phillipines to see what i must do...

[gnathaniel]

While Bulbophyllum jacobsonii is currently a synonym for plumatum, it seems like there are some fairly distinct taxa subsumed within the species name. I have both the jacobsonii-type and the longer, darker red plumatum type, the vegetation and blooms of which are readily distinguished from each other.

That said, I grow both pretty much the same way: evenly moist (wood baskets with sphagnum and styrofoam peanuts), medium-bright light, and intermediate temperatures. I keep them drier in the winter because of cooler temps, but never totally dry.

The long, red plumatum blooms for me primarily in spring through early summer. The spikes unfortunately blast very easily, which might have to do with low humidity indoors. The jacobsonii type bloomed with no problems last fall and is now in active growth.

--Nat

[Bud]

show us some pictures of your blooms, Nat