Of course, it helps if you have a RV, but it can be done staying in hotels, resorts, etc. If one starts in Florida, schedules their travels right, they can travel from February to May and have strawberries fresh all along the way, blooming spring flowers and trees in blossom. 

Actually, there is a book written that saves me a lot of time scheduling the trip so you can enjoy "forever spring."  RV Trips is that book, and very well done by Janet Groene and Gordon Groene who are an award-winning writer-photographer team who spent more than 10 years as full-time wanderers. Janet writes a RV column for several national magazines, and she and Gordon have collaborated on more than a dozen travel books. Their writings have appeared in Travel America, Family Motor Coaching, Encyclopedia Britannica, Camping Life, Trailer Life, Motorhome Life, and many other publications. he book offers a delectable menu of 20 vacations from which to choose. From South Florida to Prince Edward Island, from Ohio and Illinois to Kentucky, Mississippi, and Alabama, it guides you to magnificent scenery and must-see events throughout the eastern United States and Canada. The authors have organized this guide by season, providing you with all the information you need to plan trips you've only dreamed about. They've also included maps, camping suggestions, scheduling strategies, practical RV tips, notes on offbeat attractions, references to sources of valuable information, and much more. With the help of 50 stunning photographs, the Groenes describe these and dozens of other unforgettable experiences that will appeal to RVers of every kind.  The one hundred seventy eight pages, for $16.95 will carry you, if in your RV, or armchair, to the wonderful Eastern states at what is one of the most beautiful times of the year in any country.

They not only cover spring trips, but they also cover summer, fall and winter trips.  All the trips are scheduled to sinc with the season you choose.

I have been travel writing for a long time, but it is rare that I find writers such as this team that produce such well organized, such usable information, and so finely presented materials.  The maps, pictures of best sites to see, recommended places for RV camping along the way - it all makes for one tremendous book!

Available at amazon.com, or your local bookstores.

Happy travels.