cactus problems

Asked October 1, 2013, 12:28 PM EDT

I live in England have a cactus from about 8ins high for 26 years is now 3ft 6ins high and has developed a sort of browning on some of the spears and a mark like mould the top of theses spears are green and the bottom is green but in between they are not too well.. Can you help please.-

Outside United States cactus high desert gardening horticulture

1 Response

Would you be able to send a photo or two showing the problem with your cactus?