Tuesday, May 21, 2013

Dendrobium aggregatum

We bought the Dendrobium aggregatum at the Redland Orchid Festival last year. It was and still is potted in a 4" plastic basket with a wad of moss right under the plant and the rest of the basket is bark. We were told it wants high light, similar to a cattleya at least. The lady also said it wants tons of water and tons of fertilizer in the growing season then don't water it AT ALL from at least Thanksgiving until New Years. Wait until it starts showing signs of new growth/flowering spike then you can start watering and fertilizing like crazy again. We followed the instructions watering and fertilizing like crazy over the summer. At Thanksgiving we quit watering it all together and probably didn't water it at all for at least 2 months. It started to look really shrivelled and dry, so we looked it up and found that it's ok to water a tiny bit occassionally during the rest just to keep the pseudobulbs from totally shrivelling. We would do a very brief maybe 5 second splashing with the sink sprayer occassionally, maybe every 2 weeks as it got further and further along into the rest period. When February rolled around we started wondering when it would start doing something. We saw flowering aggregatums at shows in February and asked one of the vendors if there was a point at which we should just start watering it to force it to come out of rest. She said if it's not doing anything by March you can start watering it. It started putting on a flowering spike shortly after that, so there was no need to force it. We just went back to the tons of water and fertilizer, and it has been putting on new growths rapidly. We are really glad we were able to do this right because it was our first try at an orchid that needs a rest. It was also the plant's first year of flowering so it only had one spike, but it was really beautiful. It seems to do well with its potting setup, but I suspect it will outgrow its basket by the end of this growing season and will be ready for a repot. I think we will probably use the same method, since it seems to be working really well. These orchids that need to rest are actually really easy, because for a few months out of the year you don't have to do anything with them!

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