This cactus wasn't well cared for and grew into this scrawny little twig of a cacti. Then, I left it out in Austin, TX's freeze this past winter. It started to yellow and rot. I cut it off as much of the sickly parts as possible then left it in the shade to heal. A couple months later it makes a button!
![Image](http://farm6.static.flickr.com/5183/5674414456_8b7220c801.jpg)
Is there any way to induce a new button? Would it even be able to grow a new button through all that hard scar tissue?
Also, would it be a bad idea to fill up the pot with soil reaching just under the new growth? I just want to work towards a healthier specimen.
Thanks for any advice!