Joyful and full of life, the ever-so-cheerful Christmas cactus — Schlumbergera — is a houseplant many adore. Its bright ...

The cacti were flowering and their blooms were abundant. I think I found several species of prickly pear, bearing flowers with yellow, red and cream or caramel blooms. Claret cup cactus had some ...

Finally, while most cactus flowers close at night, claret cupflowers are open all day and all night to accommodate their pollinators. Bees, butterflies and flies are common cactus pollinators, but ...

Among the early bloomers are red and yellow cholla cactus flowers — adding their hues to landscapes also graced by the scarlet blooms of ocotillos. Chollas often bloom in late April and May ...

Keep an eye out for Arizona's iconic saguaro cactus flower as its blooming season is here for the early months of the summer.

An abrupt change in environment can cause Christmas cactus flowers to drop off. Q: What is it that makes the buds fall off of my Christmas cactus before they open? I've had this plant several ...