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  #1  
Old 06-19-2018, 05:32 PM
Chlorophile Chlorophile is offline
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I'm really finding catasetums interesting, they seem so different from every other orchid (granted, every other orchid to me is a phal). What I can't seem to find out is what happens to the old psuedobulbs. What I understand is that each year the orchid produces a new psuedobulb and the leaves and flowers come from this new growth. Do the old bulbs do anything or do they just act as nutrient storage? Can you remove an old bulb and plant it and start a new orchid and if so, why would it flower and produce leaves as a new plant but it won't if it stays attached to the other bulbs?
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Old 06-19-2018, 06:56 PM
jcec1 jcec1 is offline
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Yes the old pseudobulbs act as a nutrient reservoir for the new bulb. This is extremely important since they have a dry dormant period and start producing new growth before the rains come in their natural habitat.

I have used back bulbs (older growths) to produce new plants. They will have dormant eyes that will produce new growth if the lead growth is removed. There will be an inhibitory hormone(s) produced by the lead growth that suppress the dormant eyes (like when you pinch out the growth point of a plant it will then produce side shoots).
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Old 06-19-2018, 08:33 PM
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estación seca estación seca is offline
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Many Catasetinators recommend leaving 3-4 pseudobulbs per clump when dividing. Such plants grow and flower without setback. Single-pseudobulb divisions may not grow as well for the first year, and there is a chance they will not grow at all.
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  #4  
Old 03-31-2021, 08:51 PM
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SouthPark SouthPark is offline
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Quote:
Originally Posted by Chlorophile View Post
Do the old bulbs do anything or do they just act as nutrient storage?
A few years late here ------ but it is a good question - and I can say that they don't necessarily just act as nutrient storage.

One of my Fdk. After Dark (hybrid type catasetum) only started to produce a flower spike ----- not from this current growing season's green leafy bulbs ------ but instead is producing a flower spike from one of last season's bulbs. It is expected to be like an 'SVO Black Pearl' in shape and colour --- the flowers that is ----- except it's not an 'SVO Black Pearl'.

So - basically, I was expecting a spike to come from the large bulb (still with leaves) from this season's growth. However, the spike is clearly coming from last season's leafless bulb.

I will later take some pics to show what I mean.
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Old 03-31-2021, 11:32 PM
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Just uploading those pics now. The Fdk. After Dark is in the black coloured plastic pot.

There are two bulbs from this season. The bulb with the dried up remnants of leaves from the previous growing season developed a spike. And during all this time, I was looking out for spikes to come out of this year's bulbs ----- especially the fairly big bulb from this growing season.

This Fdk. has been growing in 100% scoria for approximately 2 years ----- could be more than that. I just water it every morning - with a garden hose. And I give it weak fertiliser and weak mag-cal ----- once a month.

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Last edited by SouthPark; 04-01-2021 at 03:45 AM..
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