In these Brain Busters, the player needs to protect all the endangered plants. Completing a level would earn the player star before the 1.7 update. After the 1.7 update, the objective is still the same, but only requires the player to progress on the map. If an endangered plant gets eaten or destroyed, the game screen will display "THE ZOMBIES ATE YOUR PLANT!" instead of "THE ZOMBIES ATE YOUR BRAINS!" and the player loses the level in a similar manner. If an endangered Iceberg Lettuce freezes a zombie, the text displayed is identical, even though Iceberg Lettuces cannot be eaten by zombies. Similarly, in Big Wave Beach - Day 30, when an endangered Guacodile rushes away to eat the row of zombies, the player also loses, even though Guacodiles cannot be eaten by zombies. The only time the text is different is in Dark Ages - Night 12, where the text will say "PUFF-SHROOM DID NOT SURVIVE" if the Puff-shrooms disappear normally.
Modern Day - Day 15 and Jurassic Marsh - Day 15 use the exact same layout for endangered plants.
If the player dug up the endangered plants before the 1.9 update, they would lose the level as if they were eaten. This would occur because the game registers digging up a plant the same way it does when it gets eaten. After the 1.9 update, however, the shovel has no effect when used on endangered plants.
Even though the player's brains are not eaten if the plant is eaten, the brain image is still shown if the player loses.
Save Our Seeds is a reference to the phrase "Save Our Ship" or "Save Our Souls," also known as S.O.S used in emergencies.
The endangered plants are placed on yellow and black squares, which is the universal caution sign with diagonal stripes.
In Pirate Seas, if a Zombie Parrot steals an endangered plant, the black and yellow square is stolen along with that plant.
Sometimes, the brain will not show up if the endangered plants were eaten by the zombies. This could be a glitch.
Due to a possible glitch, Wall-nut First Aid does not work on the endangered Wall-nuts in the Wild West Save Our Seeds levels. However, it could have also been implemented as an extra layer of challenge.
Also, there are no Key Gates for Save Our Seeds in Kongfu World.
When the player starts a level, they can sometimes see the dirt under the endangered plants from the planting animations.
The endangered tile can be on Lily Pads. It covers the Lily Pad, making them unseen. The only way for this to happen is Fisherman Zombie pulling the endangered Banana Launchers forward in Big Wave Beach - Day 23.