Comments

Comment by Seprest

This drops from the tree in your level 3 herb garden. Be careful picking these up, as they are conjured and will thus be destroyed if you log out for too long.

Oranges can also drop.

Comment by vorlash

Picked these up in my herb garden today. They respawned almost immediately.

Comment by Eido

GARRISON HERB GARDEN FRUITS
I personally tested, and looked through each page's comments, as well as the Wowhead guide to put the following information together:

To obtain fruits from your herb garden, you must have Herb Garden Level 3.
If you have a follower assigned to your garden, you may have to reset him/her in the working slot to get the fruits to appear.
As shown by the tooltip, you can only carry 10 of each type of fruit at one time.
The fruit that spawns daily is random but 2 types can spawn on the same day. Combinations I have witnessed:

See this post for datamined information.

They each provide their own secondary stat buff once consumed.
They are conjured items, so they will disappear (from your bags) if you log out for more than 15 minutes.
However, the Well Fed buff will remain on your character and you may still obtain more from under your tree.
The fruit containers have a respawn time of about 10 seconds.

There are 5 types of fruits that will spawn under the tree (next to your herb garden) within lootable 'containers' of themselves.

O'ruk Orange (container)
Ironpeel Plantain (container)
Giant Nagrand Cherry (container) - (not to be confused with Nagrand Cherry from the Burning Crusade xpac)
Fuzzy Pear (container)
Greenskin Apple (container)

When looting the containers for each fruit, there is a small chance (~2%?) you may receive a "perfect" version of the respective fruit, instead of the normal version (listed above).
NOTE: you CAN receive the perfect version if you have all 10 of the normal version already in your bags.

Upon Use, the perfect version will immediately give the 'Well Fed' buff, last for 2 hours (up from 1), AND persist through death, which makes them ideal for raiding.