A costume changer can be used to set whether the plant would wear its costume or not, except for the limited-time costumes of Sunflower, Peashooter, and Wall-nut. It can also change the costumes of the plants if there were more than one costume obtained. Depending on the costume, costumes could be obtained in piñatas, Señor Piñata, Mystery Gift Boxes, or the store (prior to the 5.7.1 update, but returned in 6.5.1).
2.9: The costume changer was released alongside three new obtainable Halloween costumes for Bonk Choy, Repeater, and Kernel-pult.
3.1: Six of the previously unused costumes became obtainable through Piñata Parties in the duration of the Feastivus timeline. All of the Big Wave Beach costumes (excluding Banana Launcher), Homing Thistle, and Sweet Potato's costumes were also added.
3.4: Costumes for all plants missing them since Banana Launcher, excluding Ghost Pepper, Sweet Potato, Pepper-pult and Dandelion, were released, along with Spring-themed costumes for Bonk Choy, Twin Sunflower, Snapdragon, and Kernel-pult made specifically for the Springening event.
April 15, 2015: a new costume for Bonk Choy and some existing costumes of plants were released to the shop.
3.5: Special costumes for Cabbage-pult, Bonk Choy, Kernel-pult, Snapdragon, and Lightning Reed were added to commemorate Plants vs. Zombies' 6th birthday.
3.8: Summer-themed costumes for Repeater, Lightning Reed, Tall-nut, Winter Melon, and Pepper-pult were released for the Summer Nights event. Costumes for Stallia, Gold Leaf, and Strawburst were also added.
5.0.1: Comes with Explode-O-Nut's costume, alongside Snapdragon's unused stovepipe hat costume, the Summer Nights costumes for Repeater, Lightning Reed, Tall-nut, Winter Melon, and Pepper-pult.
^ = Limited-time costume (these costumes are automatically worn during the event and will be removed once the event has ended) ^^ = Costume that the player can keep
Icy Currant's costume Puzzle Piece shows a set of purple bracelets behind the purple pacifier used in-game
If the player exits a level with a plant without a costume planted in that level and gets the plant a costume, the original plants do not have costumes but all newly-planted one will.
In the Chinese version, during the 1.1 update, costumes are the first time award for completing Gargantuar Crisis and Evil Danger Daily Challenges.
Starting from the 2.9 update, with the exception of Peashooter, Sunflower, and Wall-nut, plants that have costumes will have their portrait in their Almanac entry and the seed selection screen covered with what appears to be glass.
As of the 4.6 update, all Almanac portraits are covered with this glass substance, regardless if it is a plant or zombie. It was removed in the 5.7 updates.
Some plants, such as the Lily Pad and Spring Bean, have feminine costumes, despite being referred to as male.
The costume shop gives the costumes names and descriptions.
It also refers to Sun-shroom as female, despite it being mainly referred to as male in its almanac entry.
In the International version, Ghost Pepper's costume was not obtainable until 4.1 update.
Pepper-pult's Summer Nights costume is the only official one obtainable.
Both of Shrinking Violet's costumes are based on different types of footwear.
Both of Parsnip's costumes are based on its attack ability and sound.
You can sometimes obtain costumes for plants you don’t own, including ones purchased in the store.
Bloomerang's store-purchased costume may be a reference to Link, the main protagonist from Nintendo's 'The Legend of Zelda' series, who also utilises boomerangs.