In Minecraft Plants vs Zombies, plants could be obtained in the following ways: 1. Plant: Plant plants on a farm or garden and wait for them to mature to obtain plant fruits. 2. Collect: You can collect plants by defeating monsters, zombie villagers, digging for treasures, and so on. 3. Drop: Some plants will drop from the death of monsters and zombies. 4. Activity Reward: Complete certain tasks and achievements in the game to obtain plant rewards. It was important to note that different plants had different ways of obtaining them under different circumstances. For example, sunflowers could be obtained by planting and waiting for them to mature, while peashooter could be obtained by defeating zombies.