Q: I have a customer with a nobile dendrobium that has asked me about roots growing from higher branches. It is a healthy plant and he wants to repot it so it continues to grow. Should I just leave this high roots alone, they are healthy, and just repot as I would a normal orchid?
A. Usually when roots start on the stems it means the roots below are not happy. My guess is they still have this plant in the deco pot (which doesn’t breathe as well as a terra cotta). Not much you can do other than repot and keep the roots below warm so they can recover. To get more flowers the plant has to grow new canes. Leave the old ones on.
Q. My Nobile Dendrobium has lost all its blooms after giving me much joy. The plant looks very healthy and has two new leafy shoots. I am wondering if I should transplant the Dendrobium to a larger pot than the 6 inch plastic pot it came in? I am also hoping the plant will bloom again.
A. Continue watering and fertilizing as directed. Nobiles will typically bloom once per year, so you’ll need to be patient to have it rebloom. You can also repot, but you don’t necessarily have to go up in size unless it’s outgrown the pot. They do like to be a little “tight” in the pot.
Don’t cut the formerly blooming cane on the Nobile. It needs it to get stronger! You’ll want to continue to care, fertilize, etc because you want to grow another cane. Once that cane grows as big as you think it will get (it will probably be smaller than the previous one), and it has plenty of leaves, you’ll notice a knobby end starting at the top (called a mitten), it will look almost like the very top of a finger. Then you’ll want to go to cooling (dropping the temps down to 55-65°F at night). Once you see flowers, you can bring it back to normal room temp. The methods to rebloom Phalaenopsis are very similar methods to rebloom Nobiles.
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