Have you looked at it from another angle? How many girls can you muster to do a course? There are the people who work for you and what about any other florists in the area. If you could get enough people together perhaps the college would be willing to set up a City and Guilds or NVQ course at a centre near you (perhaps a room in a church hall) for say one day a week and the students work in their shops as usual for the rest of the time.
Pots is right you definitely need to chat to the college about your staff and your own future career.

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Rainbow

Quote of the day : To keep the heart unwrinkled, to be hopeful, kindly, cheerful, reverent that is to triumph over old age.
Amos Bronson Alcott