i had one of these...purchased it in a supermarket also. darn, i just can't remember the name of it!!! i do remember that the soil needed to be kept very moist and it needed filtered sunlight in low amounts. i put it close to a west facing window that only received late afternoon sun (and not all that much). it did very well - grew nicely & was easy to pinch back to keep it looking bushy (if you don't pinch it back it'll get leggy). i might have the tag somewhere in my gardening stuff (i tend to keep them)
i just looked at the clock!!! i've been roaming this forum for hours!!! time for me to go to bed...i'll look for that tag tomorrow...