If your annual flowers aren't exploding with celebratory fireworks of color right now, it may be lack of fertilizer.

Roses are red, violets are blue. Except they’re not. They’re, er, violet. True blue flowers are exceedingly rare, and not for lack of effort. Plant breeders have repeatedly tried to nudge ...

Until the breakthrough introduction of 'Blue Angel' in 2012, hardy hibiscus bloomed only in red, white and pink. More than a decade ago, Dariusz Malinowski, a plant physiologist with AgriLife in ...