There are two crop packs available that will unlock three different kinds of crops each. Before these crops can be planted, the crop pack has to be purchased with either Smurfberries or Coins.
The Summer Salad Crop Pack includes crops for radishes, lettuce and green pepper and can be bought for 4,000 Coins. To buy this crop pack the village has to be at least on level 11. The first crop (radishes) unlocks immediately, the other two are unlocked at a higher level.
The Fruity Fun Crop Pack includes crops for grapes, pineapples and cantaloupes and is available from level 17 onwards. It can only be purchased with Smurfberries and costs 20 Berries. The first crop (grapes) unlocks immediately after the purchase, the other two crops are unlocked at a later level.