It doesn't get much better than
this for results in Google for Herndon. (Maybe some, and I am currently in the US on Google.com)
What they said above for sure!
I make a small assumption that Herndon isn't your only delivery area. If it is, then disregard the rest of this post.
I would also do some other research on your entire delivery area, and find out what people are actually searching for on Google.
I checked out the map, and you are close to Dulles Airport, and Washington, DC and perhaps some other towns or landmarks that are
in your delivery area that may suitable optimize for.
I find that researching competitors is the best way to start in this regard. Worldgate, one of your top competitors is optimized for many areas that you may also deliver to.
<meta name="keywords" content="Worldgate Florist - Herndon, VA, 20170 Florist, Florist in, Florists, Flowers, Flower Shop, Flower Delivery, Send Flowers, Buy Flowers, Order Flowers, Fresh Flowers, Online Flowers, FTD Member, Wedding Flowers, Wedding, Funeral, Sympathy, Gift, Gifts, Basket, Baskets, Gift Basket, Gifts Baskets, Bouquets, Roses, Birthdays, Anniversary, Gourmet, Herndon, VA, Ashburn, VA, Chantilly, VA, Fairfax, VA, Great Falls, VA, Leesburg, VA, McLean, VA, Reston, VA, Sterling, VA, Vienna, VA."/>
<meta name="description" content="Worldgate Florist - Herndon, VA, 20170 Flower and gift ordering locally to Herndon, VA, Ashburn, VA, Chantilly, VA, Fairfax, VA, Great Falls, VA, Leesburg, VA, McLean, VA, Reston, VA, Sterling, VA, Vienna, VA or worldwide via our international delivery. Buy flowers online for same day and next day local florist delivery."/>
In searches, they aren't doing a very good job of it, but they do have the meta tags in place.