I would say almost all den-phal hybrids have some spatulata in them in their breeding line.
Depending on how much of which is in them, the plant's need can be different.
Now, dendrobium biggibum, the original species phal dendrobium, can actually withstand a bit of cooling and they do have dormancy in their native habitat. Shorter days and cooler temperature, that is.
The spatulata groups originate from regions much closer to the equator and these plants do not really experience seasonal change. They get year round warmth and sun, thus growing and flowering continuously.
In general, their hybrids can be all grown the same way. However, I would recommend that you grow them more like you are growing the spatulata species. With time, you will notice their growing habit and you can change the culture accordingly if you want.
In general, like anything else, they need a lot of water while they are growing, so do not let them go dry. Make sure the pot drains well, though.
The higher the light, the better the growth and flowering will be. Just reduce a little bit when you see leaf burn.
Do not expose them to cool temperature. Depending on the amount of den. phal in them, some varieties may withstand some cool temperature, but it is always nice to err on the warmer side with these plants. As cooling is not really necessary with the hybrids.
cooling may cause yellowing and dropping of leaves, which is not good for the plants as the leaves on these plants are supposed to stay attached on the canes for years supporting the entire plants.
Actually, quite often, when grown under warm and bright conditions year around, the spatulata genes will kick in and the plants will grow year around and flower more than one or twice a year.
Last edited by NYCorchidman; 11-03-2013 at 02:15 AM..
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