Space is premium and luxury. Especially for you who live in big and dense city. One thing you can do is by hanging your herbs. Hanging herbs can be hanged both from wall or ceiling.
There are tons of hanging herbs ideas that you can easily find in almost any where. But most of them are seems not doable and not perfectly fit for your front yard. Here you can find 37 Spring Hanging Herbs Garden Ideas that will certainly fit for your front yard. Check them all and let us know which one you want to have.