Kevin,

Regarding your Phals, most are annual bloomers, and the new spikes are
encouraged by cooler weather in fall and early winter, when you hope for a
temp differential in the area of 10 to 15 degrees, day to night. Once they
bloom again, if you treat them right you will have blooms for months. I
have one Phal that is still blooming (since last winter), and needs
repotting. I'm going to cut the spike down and put it in a vase. The plant
needs time to rejuvenate.

Nobile Dendrobiums need a winter rest, in most cases for a couple to three
months. When growth stops, deny water and fertilizer. If you grow outside,
as I do, don't worry about what nature gives the plants. Resume water and
food when new growth appears.

Hope this helps.

Diana