A costume changer can be used to set whether the plant would wear its costume or not. It can also change the costumes of the plants if more than one costume has just obtained. Peashooter, Sunflower, and Wall-nut have limited-time costumes that can be wore without changing it. However, it is now obtainable since 8.7.1. Depending on the costume, costumes can be obtained in piñatas, Señor Piñata, Mystery Gift Boxes, or purchasing them with gems or coins in the store.
^ = Limited-time costume (these costumes are automatically worn during the event and will be removed once the event has ended) ^^ = Limited-time costume until its costume became permanent in the 8.7.1 update
^^^ = Costume that the player can keep
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 store.
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.
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 were 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 update.
The costume shop gives the costumes names and descriptions.
In the international version, Ghost Pepper's costume wasn't obtainable up until 4.1 update.