Posted: 15/10/2014 at 13:47
It's lovely that you've been able to discover where your grandmother's grave is. However, before you plant/sow things on it, it would be as well to check out the regulations relating to the cemetary/churchyard that she's been buried in.
Although no family may have visited for a while, it's unlikely that the grave will have been allowed to become overgrown and unsightly. Most graveyards are maintained and mown, or are nurtured as wildlife sites.
Planting up a grave may cause real difficulties for the person who mows the area, so it'll be best to check it out first.