Mulchlady – I received nine nobile dendrobiums from Yamamoto Dendrobiums (
Yamamoto Dendrobiums Hawaii) in July and August this year (this is the first time I’ve had nobiles in years). I haven’t fertilized them at all. Temps were hot, so I watered almost every day and they got full sun (still do). Beginning last month, temps have decreased, so I backed off watering them, from daily to weekly. I leave them outside with my cymbidiums – the only time they get moved in is when the temp is below 35°. This month they were rained on, and I’ll be watering once a month until they begin new growth next year. I haven’t made up my mind on which fertilizer I’ll be using. The link in my earlier post was the care section on Yamamoto’s web site; here is what Yamamoto recommends as to fertilizer:
“
Fertilizing - Low-nitrogen fertilizer should be used for flowering plants. Be sure to stop fertilizing after early August if you wish to have many flowers. For small plants grown without supplemental heat and where night temperatures fall below 46 F (8 C) in winter, apply fertilizer high in nitrogen when night temperatures rise to about 50 F (10 C), probably in March or April. If night temperatures in winter are higher than 50 F (10 C), then fertilize from January. The easiest way to fertilize small plants is by using slow-release fertilizers that are effective for more than half a year.
Fertilization for blooming size plants should not be time-release type as it may cause over fertilization.”
Right now about seven of them are beginning to form buds. One bloomed in October.
Hope this helps!