Overwatering is a common concern for indoor cacti, he adds, as is too little light. One common example is the brain cactus, Mammillaria elongata f. cristata, Justin adds. It grows in a unique ...

The keenest and most observant of viewers, however, may just be able to make out a pair of ears and whiskers nestled between the large cacti and white ... are a form of brain teaser that tests ...