I hope this helps Bill)

Watering:

The watering may be the most crucial element to success with these orchids. Their native conditions are fairly wet during the late spring, summer and early fall. Rainfall can be quite heavy for a few months, but it tapers off in the late fall, and winter months are fairly dry. Water the plants regularly when they are actively growing; mounted plants can be watered daily if air circulation is good. When the new pseudobulbs have matured in the fall, gradually reduce watering, and allow the plant to dry between waterings.

Winter Rest:

Den. aggregatum requires a winter rest period. For a few months (Nov-Jan), the plant should be exposed to 50-60 degree temperatures at night with slightly warmer days. Watering should be gradually withdrawn and fertilising completely stopped. Plants should be watered very sparingly throughout the rest period if the pseudobulbs show extensive shrivelling. Some shrinkage should not be alarming and plants may be partially deciduous. Sun exposure should remain the same from the growth period through the rest period in order to ensure spring blooms and growth.

That strikes me as a very good run-down for this species. Gonna save it for future reference. I especially like the part about not being alarmed about some shrivelling and possible leaf loss. Keeping the light bright, but cool, so it can conserve the moisture it has. Can’t wait to try this species.

I find them tough to bloom, see conversation from 2017-2018: Den "aggrevatum" Hoping for blooms this spring!!!

Good luck,

Bob

That other conversation was interesting. Difficult to compare what the Florida grower was doing, since his are outdoors all year. Quite a different story from trying to grow this orchid indoors. My sun room is definitely cool enough at night to trigger blooming. I've only watered twice since I took the plant home from the grower's greenhouses, but that was in October. Have fed it only once with a weak solution, at the grower's instructions because he had repotted it for me. If I get blooms next spring I will consider myself lucky! Thanks for the info.

No fertilizer at all during the dry months (winter). Water very little. Don't worry if the bulbs are shriveling. They do each year.

I grow in Florida and they live outdoors. They get rain when it rains which is very infrequent. They are in full sun. Bulbs shrivel but they flower for me without fail. They plump back up over summer. Just don't look at them!

You want those flowers!!

Jane

That is so beautiful on that mount.

Jane, absolutely beautiful!! I know you must miss New York but then at times love living there! How is your Angraceum doing? It was because of you I fell in love with this one and have several different types!

Did you give that one just a sunny window when in New York? It always did so well. What was the general care you gave that one while in doors? Did you mist it? Full sun? Every put it outside?

Mike