Lemon grass is also a favorite of mine for soap (great smell) and when chopped small enough it works as a great abrasive.
If you grow lemon balm , best contain it or it can take over . In the mint family. I think it is well worth growing there are a lot of health benefits in tea from this herb and it is a natural insect repellent including mosquitoes.
If you are looking for lemon scented herbs you also might like to try lemon verbena ,I think it has an even stronger sent than the two above mentioned.
...and there a very nice lemon thyme that is great with fish or in herbal teas.
