This guide is strictly on farming from fences using plant breeding.

There are 3 ways to get Fruit of X:

1) random rare bonus when hoe-ing any wild plant
2) random rare bonus when harvesting crops in your farm
3) not-random rare bonus when harvesting SEEDS in your farm.

Abundance - Sunflowers, Strawberry, Grape, Onion

Crimson flame - Pepper, Garlic, Hot Pepper, Pumpkin and Olive

Destruction - Sky Mushroom, Dwarf Mushroom

 Enchantment -  Silver Azalea, Fire Flake Flower, Silk Honey Grass, Dry Mane Grass and Sunrise Herb

Magic power - Emperor Mushroom, Hump Mushroom

 Nature - Carrot, Barley, Seed Potato and Sweet Potato

Perfection - Fog Mushroom, Arrow Mushroom, Cloud Mushroom

 Sun - Tomato, Paprika, Wheat and Corn

Thanks to Deioky for original information.