For the
more adventurous there is this excellent book by Anne McIntyre.
This is not for the feint hearted and is really only suitable for
someone who wants to make this more of a profession than just a
little hobby. Nonetheless the information about growing and managing the plants and herbs is
superb and nothing is left out or to chance. You will know exactly
what to do and when to do it.
The full price is more than twice the price of some of the book
dealers offers (£157) here so you can get a bargain.