Using Superphosphate for Hydrangeas?
Has anyone heard of using superphosphate for getting hydrangeas to bloom? It was recommended to me by one of our local nurseries, to do now and in January. I tested the soil by my oldest and largest hydrangea( that has not bloomed in 2 years), and it had adequate phosphate.
I have not seen phosphate recommended by any hydrangea sites.
I think it would have bloomed except we had a very warm week, when I uncovered it, and then we had two weeks of temps in the teens at night, which ruined fruit crops and other things around here. Unfortunately, my "Endless Summer" and "Now and Forever" hydrangeas (that are supposed to bloom on new wood) did not bloom either this year. I used acid fertilizer, but this did not seem to help. This is Bayer brand fertilizer, that states to use twice a year, in late spring and late fall. I am hesitant to do anything right now due to conflicting information. I do have 6 hydrangeas that are still alive.