Apple

Apples were a common fruit on Earth.

There were different varieties of apple, which included St Edmunds Pippin, Mère de Ménage, Catshead, Ribston Pippin, Ashmead's Kernel, Mannington's Pearman, Lodgemore Nonpareil, Devonshire Quarrenden, Cox's Orange Pippin and Golden Delicious. They could be green, red or a dusty grey, small, large or lumpy. According to Jack Harkness, one variety was lemony, and one was sweet and juicy with a taste of mango. (PROSE: Slow Decay)

The Fourth Doctor once claimed that he had hid up a tree and dropped apples on Isaac Newton's head. (TV: The Pirate Planet) Newton remained upset about that, as his nose bled for three days afterward. (AUDIO: Summer)

The Fourth Doctor had an apple core in his pocket that was found by Kellman while searching the Doctor. (TV: Revenge of the Cybermen)

Peri was eating an apple, which the Sixth Doctor took a bite out of before they flew near Halley's Comet. (TV: Attack of the Cybermen)

A pig's head with an apple in its mouth was one of the foods served to the sons of Grekk. (PROSE: The Sons of Grekk)

While possessed by the Mara, Tegan dropped apples upon Aris in order to get his attention. (TV: Kinda)

In the 12th century, while in the company of Robin Hood in Sherwood Forest, the Twelfth Doctor ate an apple and conducted a scan on it with his sonic screwdriver, unconvinced about the reality of his surroundings. (TV: Robot of Sherwood)

The Sixth Doctor carried an apple in his pockets. He gave it to Captain Emmanuel Swan, who was complaining about being hungry. (AUDIO: Doctor Who and the Pirates)

A bowl containing apples was present at Sutcliffe Manor during the 1814 frost fair. (TV: Thin Ice)

While at Shangri-La, a young boy handed the Seventh Doctor an apple. Melanie Bush repeatedly prevented him from eating it. (TV: Delta and the Bannermen)

Apples were served at King Gilgamesh's court in Uruk. (PROSE:  Genesys)

Whilst visiting the Worldsphere, the Seventh Doctor met a parachute that designed apple trees in its spare time. (PROSE: The Also People)

Emptying his jacket pockets in 2006 London, the Ninth Doctor found an apple among other items. (PROSE: Winner Takes All)

Following his regeneration, the Tenth Doctor found an apple in Howard's dressing gown, which Jackie had provided him with. Jackie claimed that this was because Howard "sometimes" got hungry in his sleep. (TV: The Christmas Invasion)

By the mid 2000s, numerous apple varieties were dying out because people wanted their apples all the same size and same shade of green. (PROSE: Slow Decay)

Following his tenth regeneration, the Eleventh Doctor thought he wanted an apple but didn't like it. Amelia Pond disliked apples when she was young, until her mother began carving happy faces into them. She gave an apple with a carved happy face on it to the Doctor, who promised to keep it for later. After travelling forward twelve years, the Doctor proved his identity to now-grown Amy Pond by showing her the same apple, still fresh. (TV: The Eleventh Hour) He later enjoyed an apple he found on a prison ship. (TV: The God Complex)

Circa 2164, David Campbell recovered a box of apples from a deserted store in London and brought the box back to the resistance HQ. Barbara Wright and Susan Foreman later ate some of the apples. (TV: The Dalek Invasion of Earth)

In 2025, apples were genetically modified to taste like other things to get children to eat them. Rose Tyler, while visiting a storybook-based theme park, took a bite of one that tasted like cheeseburger, only to spit it out in disgust. (COMIC: Down the Rabbit Hole)

Apples from Eden were sold at Primo Temp. (COMIC: Buying Time)

At some point in the far future the word "apple" was used in the prevailing calendar system, as the year 5000000000 was known to the locals as 5.5/Apple/26. (TV: The End of the World)

Further in the future, apple trees were extinct. In Hope on Endpoint, the Eighth Doctor paid for admittance to the Silver Palace with an apple core from his pockets; this enabled Silver to clone it and grow apple trees hydroponically. (PROSE: Hope)

Nardole used apples to trick Cybermen into thinking that they were grenades. (TV: The Doctor Falls)

Behind the scenes
The Latin name of the First Gardener, Malus pumila, is the scientific designation of "apple".