My plant looks dehydrated ,how often and how much watering is advisable? Some of it's fingers have brown areas.Sorry but I can't send a photo.

I'm assuming you mean Euphorbia (Euphorbia ferox) (with an fErox)

Can you describe the care you provide? Is it outside or inside? How close to a sunny light source? What is it planted in? How often have you been watering it and how do you decide to water? Describe a bit more how it currently looks.
A photo would be ideal, can we help you in uploading one?

Thanks for replying. I've sent a photo and The plant is in the same soil it came in from the nursery. I water it about twice a month.. not a lot of water. Rain water.

Not sure where you sent a photo but there is no photo in this thread.
Use the upload 'choose file' option below, the upload code will look something like this [ lightbox]648fu [/lightbox].
Click the preview to see if it's the right photo and then click finished.