Most hydrangeas should be fertilized in early spring to provide nutrients to produce summer blooms. Learn how and when to fertilize hydrangeas correctly.

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

I observe that in this plant at Mentone the flowers attain their brightest colouring after the ovaries are set, and when fertilisation is no longer necessary, or indeed possible. During the period ...