Stunion is the fourth plant obtained in Frostbite Caves in Plants vs. Zombies 2. He is a single-use plant and when zombies get close to him, he releases a cloud of gas in a 1x2 area in front of himself, similar to the one emitted from a zombie defeated by Chili Bean, stunning the affected zombies for 12 seconds. The gas cloud does not affect mechanical enemies, except for Zombie Bulls, Gargantuar Primes, Treasure Yetis, and Bug Bot Imps.


A real-life Allium cepa in which Stunion is based on

Stunion is based on the onion (Allium cepa), which is usually used as an ingredient in cooking, thanks to its distinctively pungent taste and aroma. His name is a portmanteau of "stun," an act of driving someone into an unconscious or semi-conscious state, and "onion," the plant he is based on

His description may be a reference to Shrek, with the saying, "onions have layers."

Almanac entry



RANGE: Close

FAMILY: Contain-mint

Stunions breathe a stunning cloud of gas on nearby zombies in the lane.

Usage: single use, activates when zombie is close
Special: stuns nearby zombies

Oh sure, everyone knows Stunion as the battle-hardened warrior with the potent breath. But he's so much more than that. He's an accomplished pianist. He speaks five languages fluently. Heck, he's the leader of a Cub Shallots group in his spare time. Dude's got layers. Go on, peel 'em back. You'll see.


Plant Food ability (animated)

Plant Food effect

When fed Plant Food, Stunion will release a burst of gas in a 3x4 area in front of him, stunning all zombies in the said space for 18 seconds.

Contain-mint effect

When boosted by Contain-mint, Stunion will poison zombies he stunned, dealing 50 DPS per second. If Stunion is at level 10, Contain-mint will do nothing.

Costumed (China only)

Stunion now releases a burst of purple gas in a 3x5 area in front of him, stunning affected zombies for twice as long.

Level upgrade

Level Seed Packets Coins Upgrades
Sun Cost Recharge
1 0 0 25 20 seconds 15 seconds 300 dps N/A Close
2 10 1,000 19 seconds 14 seconds 350 dps
3 75 5,000 18 seconds 13 seconds 400 dps
4 200 10,000 17 seconds 12 seconds 450 dps
5 400 20,000 16 seconds 11 seconds 550 dps 25 dps
6 750 30,000 15 seconds 10 seconds 600 dps 30 dps
7 1,000 40,000 14 seconds 9 seconds 650 dps 35 dps
8 1,250 50,000 0 14 seconds 9 seconds 700 dps 40 dps
9 1,500 60,000 13 seconds 8 seconds 800 dps 45 dps
10 2,000 75,000 12 seconds 7 seconds 900 dps 50 dps

*After reaching Level 5, Stunion will gain the ability to poison the zombies it stunned. This column will show the damage-per-second the effect deals on the affected zombies.

Level upgrade (China only)

Level Upgrades Description
LevelIcon2New.png Stunion Upgrade 1.png
Paralyzing Gas
Zombies are stunned for longer.
Combat Training
Stunion gains 50% more attack power and health (150% of initial).
LevelIcon3New.png Stunion Upgrade 2.png
Strong Paralysis
The stun is now doubled.
Cell Activation
Stunion gains another 50% more attack power and health (200% of initial).
LevelIcon4New.png AbilityAwakendIcon.png
Ability Awaken
Stunion may be boosted when planted.
Fighting Power
Stunion gains another 50% more attack power and health (250% of initial).


Compared to Iceberg Lettuce, Stunion can stun all zombies in his area of effect instead of just one target. The stunning effect is not nullified by fire-based plants and also works in Frostbite Caves, where Iceberg Lettuce can only slow instead of stop enemies. In most cases, though, his slightly bigger price will not matter. On the other hand, his Plant Food effect is significantly worse—while Iceberg Lettuce's plant food ability affects the entire screen, Stunion's plant food ability only affects a limited area.

Stunion is a good choice against Chicken Wrangler Zombie and Weasel Hoarder, as he can stun them and prevent them from releasing Zombie Chickens or Ice Weasels, even when they are defeated.

In Dark Ages, Stunion can be used to prevent Jester Zombie from reflecting projectiles. However, the same is not true for Parasol Zombie and Excavator Zombie in Lost City, as they can neutralize projectiles even when stunned. If using Stunion against MC Zom-B during rap, make sure to plant him on the square that MC Zom-B is on or the one in front, otherwise MC Zom-B can kill him with his microphone which has longer effective range.

Stunion should not be used in tandem with Primal Peashooter, as the latter's knockback will remove the stun effect, rendering Stunion useless. Iceberg Lettuce should be used in this situation instead, since its freezing effect is not interfered by Primal Peashooter.

Stunion also works well with Primal Potato Mine since he stops the zombies whilst the Primal Potato Mine arms, creating a cheaper Cherry Bomb.

At Level 5 and above, Stunion gains an armor-piercing poison effect akin to Shadow-shroom on stunned zombies and thus can be used more offensively against weaker zombies and headwear zombies. A single use can defeat Chicken Wranglers and Weasel Hoarders without releasing their animals due to the stun, and also kills headwear zombies in one use. At Level 8 and above, Stunion becomes free, allowing the plant to be used more frequently, especially during levels in which there is a maximum amount of sun to spend, including Last Stand levels.

Avoid using this plant in Far Future, as the mechanical enemies are immune to the gas cloud and therefore, wasting a seed slot.


Plants vs. Zombies Wiki has a gallery for Stunion.
Visit this page to see it.


  • He can stun flying zombies, unlike Iceberg Lettuce and Chili Bean.
  • When he disappears, he makes the same sound as Puff-shroom when dying.
  • If he stuns a zombie and that zombie dies before the effect is gone, the zombie's body will just remain there, standing still until the stun effect ends and the body collapses. The gas cannot be seen.
  • If a stunned zombie is pushed back by Hurrikale and lands up on a slider tile, he will remain there until the gas disappears.
  • For a brief moment after stunning, he can be shoveled for sun.
    • This is similar to Ghost Pepper, which can be shoveled for sun briefly after exploding.
    • This is also similar to Grimrose, which can be shoveled up before expiring. 
    • This is also similiar to Shrinking Violet

See also

V · T · E
Plants (Tower defense)
Plants vs. Zombies 2
Player's House Peashooter · Sunflower · Wall-nut · Potato Mine · Cabbage-pult
Ancient Egypt Bloomerang · Iceberg Lettuce · Grave Buster · Bonk Choy · Repeater · Twin Sunflower
Pirate Seas Kernel-pult · Snapdragon · Spikeweed · Spring Bean · Coconut Cannon · Threepeater · Spikerock · Cherry Bomb
Wild West Split Pea · Chili Bean · Pea Pod · Lightning Reed · Melon-pult · Tall-nut · Winter Melon
Frostbite Caves Hot Potato · Pepper-pult · Chard Guard · Stunion · Rotobaga
Lost City Red Stinger · A.K.E.E. · Endurian · Stallia · Gold Leaf
Far Future Laser Bean · Blover · Citron · E.M.Peach · Infi-nut · Magnifying Grass · Tile Turnip
Dark Ages Sun-shroom · Puff-shroom · Fume-shroom · Sun Bean · Magnet-shroom
Neon Mixtape Tour Phat Beet · Celery Stalker · Thyme Warp · Garlic · Spore-shroom · Intensive Carrot
Jurassic Marsh Primal Peashooter · Primal Wall-nut · Perfume-shroom · Primal Sunflower · Primal Potato Mine
Big Wave Beach Lily Pad · Tangle Kelp · Bowling Bulb · Guacodile · Banana Launcher
Modern Day Moonflower · Nightshade · Shadow-shroom · Dusk Lobber · Grimrose
Money Snow Pea · Power Lily · Imitater · Chomper · Sweet Potato · Toadstool · Strawburst · Cactus · Electric Blueberry · Jack O' Lantern · Grapeshot · Cold Snapdragon · Escape Root · Gold Bloom · Wasabi Whip · Kiwibeast · Apple Mortar · Witch Hazel · Parsnip · Missile Toe · Caulipower · Electric Peashooter · Holly Barrier
Gems Squash · Jalapeno · Hypno-shroom · Pea-nut · Homing Thistle · Ghost Pepper · Sap-fling · Hurrikale · Fire Peashooter · Lava Guava · Shrinking Violet · Electric Currant
Mints Fila-mint · Pepper-mint · Winter-mint · Reinforce-mint · Bombard-mint · Ail-mint · Enchant-mint · Contain-mint · Enforce-mint · Arma-mint · Conceal-mint · Spear-mint · Appease-mint
Seed packets Torchwood · Starfruit · Dandelion · Blooming Heart · Bombegranate · Explode-O-Nut · Aloe · Hot Date · Solar Tomato · Enlighten-mint · Shadow Peashooter · Goo Peashooter · Sling Pea · Snap Pea · Zoybean Pod · Electrici-tea · Dazey Chain · Blastberry Vine · Pokra · Imp Pear · Pyre Vine · Pumpkin · Ice Bloom · Dartichoke · Ultomato · Gumnut · Shine Vine · Tumbleweed · Olive Pit · Puffball · Explode-o-Vine · Murkadamia Nut · Turkey-pult · Headbutter Lettuce · Boingsetta · Stickybomb Rice · Hocus Crocus · Gloom Vine · Draftodil
Others Marigold
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