Hello. I have a few tiny cacti plants in pots at home. They are separated. I keep them inside (I live in an apartment) in a room where there's sunlight in the morning but it gets quite dark after lunch. I water them once in a week, I feel like. However, some of them die off for no apparent reason... They are all different types of cacti but I see no pattern so far and can't figure out why some of them die. I moved one of the more sad looking ones to the terrace where it can get direct sunlight for a couple of hours a day to see if it'll get better.. Do you have any idea as to why this is happening? Thank you very much :) Olly
I would avoid watering on a schedule, water only when they need it.
These articles will refresh you on the care.