What kind of cactus is this, and how do I care for it?
I recently purchased a three- to four-foot Dracaena Massangea, or corn plant. I have a moisture meter gauge that I use to determine whether my plants need to be watered or not (it has two metal prongs that you put into the soil, and a red, yellow or green light goes on to signal whether the soil is moist or not.) The gauge works great with all my other plants, but with the corn plant, the gauge never indicates that the soil is dry. I have now gone weeks without watering the corn plant, and the gauge still says the soil is sufficiently moist near the roots. The plant looks fine, but what gives? How often should a corn plant of this size be watered?