Bill Parks posted this on the discussion board:

Level 1 – Getting Started
Level 2 – Just Moved In – 20 exp points
Level 3 – Learning the Ropes – 50 exp points
Level 4 – Apprentice – 100 exp points – Buy strawberry seeds and send pear trees
Level 5 – Farmer – 250 exp points – Send Puppies as gifts & buy the Cart
Level 6 – Adept – 500 exp points – Buy wheat seeds & send banana trees
Level 7 – Promising Farmer – 750 exp points – Send pigs & buy Waterwells
Level 8 – Green Thumb – 1000 exp points – Buy sunflower seeds & send plum trees unlocked
Level 9 – Popular Farmer – 1500 exp points – Send Cows and buy Silos
Level 10 – Superb Farmer – 2000 exp points – Buy coffee seeds & send peach trees

Level 11 – Talented Farmer – 2500 exp points – Send horses & buy Windmills
Level 12 – Talk of the Town – 3000 exp points – Send Cherry Trees
Level 13 – Distinguished Farmer – 3500 exp points – Send Mango Trees
Level 14 – Specialist – 4000 exp points – Send Coconut Trees
Level 15 – Inspiring Farmer – 4500 exp points – Buy Barn
Level 16 – VIP – 5000 exp points
Level 17 – High Achiever – 6000 exp points
Level 18 – Master Farmer – 7000 exp points
Level 19 – Influential Farmer – 8000 exp points
Level 20 – Expert Farmer – 9000 exp points
Level 21 – Eminent Farmer – 10000 exp points
Level 22 – Mighty Farmer – 11000 exp points
Level 23 – Gifted Farmer – 12500 exp points
Level 24 – Green Ace – 15000 exp points
Level 25 – Acclaimed Farmer – 20000 exp points
Level 26 – Just Brilliant – 25000 exp points
Level 27 – Extraordinary Farmer – 35000 exp points

I don’t believe this list is complete. It may have been expanded upon since this was produced, however I do not have any further information.

View my other Farm Town posts.