Choose what you need to grow. Find the right water in the photos, follow the three-round recipe, then record what you did in your match.
Pick one up at spawn, either lab or the bunker. Hold interact at a water pool to fill it; check the colour in your inventory.
Kill zombies until one drops a seed, then collect it. At an empty circular stone planter, interact to plant the seed.
Once the seed is planted, interact with it to water it. Care for the same plant once on the planting round and once on each of the next two rounds. Three waterings in one round do not count as three rounds.
For recipes that use KT-4, shoot the plant after watering on each of those rounds. Harvest on the following round. For example: plant and care on rounds 8, 9 and 10 → harvest on 11.
Behind Lab A · near the spider cave
Refill at the pool whenever your bucket runs out. Filling it at another pool changes the water colour.
Observations save on this device and are shared with the helper inside the guide.
Gameplay photos: COD Zombies Guides · CoDZ Library / credited Steam creators · game: Activision / Treyarch.