My first question is
Why do you want to do this?
What makes this a good idea?
When I can go to proflowers.com, who spends literally millions annually doing this, how do you differentiate or add value to what they are doing already? What's your hook? So far, there's nothing unique in your brief sketch above. What is driving you to want to do this?
How much do you have available to spend to make this happen? How do you compete with someone like ProFlowers who spends millions in consumer perception advertising to get customers delivered to their florists nationally?
Start with more research, and demonstrating some industry proficiency. Do you have a floral background? What makes a flower shop successful? What can you tell us about what you have learned about the market?
1. Who are the top players, and what are they good at
2. What are they not good at (i.e. where is the market opportunity)
3. Have you talked with any florists? What have they told you?
4. What do the flower shops want you to do?
The outline of your business could be best discovered by talking with your potential clients to see what they want/need. Have you spent time researching them? What do they tell you?