I have a large collection of cacti that are set up on my windowsill. They get lots of light, from about 7:00 to 1:00. One of my cacti is a Paddle cactus. You are not supposed to water a cactus often, but every week I water it, it guzzles down the water. I have started to notice brown spots on the side facing the window. This may be because of the cold, because it is very cold and has been in the negatives the previous week. I have moved all my cacti farther back from the windowsill just in case. Do you know what may be causing the brown spots on my cactus? Is it odd that the cactus is guzzling down the water every week?
