Quote:
Originally Posted by jkhom
I'm not an expert but I've been told by the orchid grower near me that dens like to be planted with the media real tight in the smallest pot possible...
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I would have to disagree with that. That is not a rule set in stone.
All my hard cane dendrobiums are in wood baskets where the roots are free to roam. Some baskets dont even have a substrate - the den's roots are just attached directly to the basket.
They do like to dry out between waterings.
After a heavy drenching, a 6" clay pot indoors it could take up to a week to completely dry out.
In a plastic pot indoors, it could take as much as two weeks to completely dry out.
Watering again before the substrate dries out will cause some problems with the roots.
This is the explanation for the "smallest possible pot":
Smaller pots dry out faster than larger pots. When you have a dendrobium potted in a small pot, then it will most likely dry out before you water it again - thus satisfying its "drying out" requirement.
A larger pot filled with substrate will retain water for a very long time and will eventually cause dendrobium roots to rot if watered too frequently.
As to the "very tight packing of the media":
It is only a means to make sure that the tall dendrobium cane does not fall over.
Tall cane + small pot footprint + loose potting substrate = canes falling over and out of the pot.
So eventually, those two "rules" went hand in hand, as potting in small pots will require you to pack the media tight enough for the canes to remain stable.
Nurseries also want to maximize bench real estate so they try to grow orchids in the smallest pots possible.
If you are a frequent waterer, I suggest you try planting them in wood baskets with very little to no substrate at all.