Help - flowers and buds dropping
This is my first attempt at orchids and I have one - lable reads P.LongPride Treasure. It is yellow with wine spots. I have had it one year and it has flowered twice before. It now has 24 buds or blooms on 2 different stems. I noticed that one bloom had fallen off well before it should have and 10 buds as well. What could be causing this? It is in a north west window and nothing has really changed over the past year. Up until now it has been extremely healthy. It has 7 large leaves and lots of roots coming out the top. Also today I noticed that the lowest leaf on the stem is turning yellow. I water thoroughly when it becomes dry and I fertilize about once a month with orchid fert.