Anxiety and Sleeplessness

I have an anxiety situation related to stress and have had difficulties in having a good sleep at night. I have been using prescribed pills at a minimum in order to prevent negative side effects.
Could you please recommend some herbal medicine that I can buy or grow in my garden?

This question has been addressed before. Please see the following link and use the search term "anxiety". www.richters.com/show.cgi?page=QandA/QandA.html
I would also like to add that valerian root is a very nice remedy for such a condition to help with the symptom management until the root cause can be addressed. It should be taken during the day and before bed for best results.