Level 5-10

Level 5-10 is the final level in the Adventure Mode. The player must defeat Dr. Zomboss and zombie minions to finish the mode.

Difficulty

 * Zombies change per battle, this can extremely change the difficulty.
 * Balls, RV, Bungees, and multiple zombies are hard to deal with.

Strategies
See Dr. Zomboss.
 * Always have an Ice-shroom and a Jalapeno starting for the Zombot's iceball and fireball attacks and to freeze Dr. Zomboss to defeat him quicker.
 * Do not plant Melon-pults on the first lane, and instead plant Cabbage-pults there. This will prevent you from losing the Melon-pults to the Catapult Zombie's Basketballs. But try to use a Jalapeno as it's tolerating the roof in the Nintendo DS version.
 * Try not to keep all your Melon-pults and Kernel-pults next to each other/put them in a square position; doing this helps keep plants from the camper dropped by the boss. You will risk losing a last line of defense if this happens. Don't panic planting Cabbage-pults next to each other, as they get killed and to appear a little too often.
 * Only use the Ice-shroom to freeze Dr. Zomboss and put out the Fireball, when Dr. Zomboss reaches down to attack you with a Fireball, so that your Ice-shroom is not messy.
 * You should not use a Jalapeno while he is frozen. This will unfreeze him, and let him get away or finish you.
 * It is also possible to keep re-freezing him with multiple Ice-shrooms before he drops providing an opening for your plants. Butter cannot paralyze the Zombot, though.
 * If you freeze Dr. Zomboss while he sends out his Iceball attack, you will have to deal with the snowball with a Jalapeno, this unfreezing Dr. Zomboss.
 * Leave a column of empty Flower Pots on the first slanted lane of the roof as a buffer endless zone and to plant Jalapenos and Ice-shrooms in, and keep your plants behind them, but don't plant them farther up the roof or Dr. Zomboss may kill them.
 * Plant the Flower Pots on the flat part of the roof when you plant Jalapenos or Ice-shrooms.
 * If possible, when tough zombies such as Gargantuars, Zombonis, or Catapult Zombies appear, try to wait until they get as close to your most frontal plant before planting a Jalapeno to finish them all. This makes your use of Jalapenos in case Dr. Zomboss wants to put more zombies on the same row.
 * Dr. Zomboss has a set pattern that he follows at the beginning of the fight. He always places four regular Zombies, four or five Conehead Zombies, then lowers down to breath out a snow/fire ball, then he comes back and places four or five Buckethead Zombies (sometimes he places one Conehead Zombie), then lowers down his head again. After that, the Zombies he places are completely random, except he will not send normal zombies again. After his head lowers the 3rd time, he will then release his Bungee Zombies, then after the fourth, he will drop the RV; after that, his attacks are all completely random. However, they do appear to observe patterns that vary with each fight - some times may include more or less of a particular zombie or attack than usual, or placed in different lanes.
 * The first few plants you get on the conveyor belt are Cabbage-pults, followed by Melon-pults; try to save your Melon-pults for the Conehead Zombies.
 * The first four plants on the conveyor belt come out in the following order: Cabbage-pult, Jalapeno, Cabbage-pult, Ice-shroom. The order of plants coming in afterward is completely random.
 * Kernel-pults are the rarest to come by, so try not to plant them in a same 3x2 area to reduce chances of them being destroyed when Dr. Zomboss throws a camper.
 * If you have only one roof cleaner left, he will put almost all of the zombies in the row with the last roof cleaner left.
 * Remember to spread out Melon-pults and Kernel-pults! If you have one row of all these, the others may not get their fair share of these plants.