Survival farming, underground

Survival farming in Zombie Defence takes place underground, inside a hydroponic grow cabinet. It is part of the persistent shelter campaign: select a plot, choose a crop, and let it develop while you manage the rest of the base or head out on a run. The cabinet is divided into racks and growing bays, so expanding the farm gives you more room to plan several harvests at once.

Every rack adds three plots, up to twelve racks. The second rack unlocks roses; additional racks and purifiers cost shelter resources, so expanding the garden competes with other improvements. This is a focused indoor growing system with a visible cabinet and plot choices, rather than a free-placement farm across an outdoor map.

Butter lettuce is the quick food crop: it matures in a base five minutes and yields six heads, or more when tended. Golden tomatoes take a base 45 minutes and yield eight. Shelter roses take four hours, occupy two farm units, and yield eight blooms. Actual growth speed also responds to irrigation and shelter bonuses, so the listed crop time is a starting point rather than a promise under every farm condition.

Water is the central growing constraint. The shelter’s Water & Hydroponics room, installed purifiers, and a garden expansion bay contribute irrigation. When demand exceeds supply, crops grow more slowly; stored water can cover a shortfall until the tank runs down. You can tend an unfinished plot by spending five litres, which raises that crop’s harvest by 25%. Ripe crops wait safely on their plots until you harvest them, giving you time to make pantry space.

Harvested produce goes into the crop pantry, where each type has its own capacity. Lettuce and tomatoes can be served to add food to the colony’s shared supplies. Colony food is consumed over time, so harvests supplement the shelter’s food production and help keep residents fed. The pantry is a buffer for your choices; it is not an unlimited warehouse, and a full crop store must be used before you can harvest more of that plant.

Produce can also become a meal for the next expedition. Five lettuce make a Garden Bowl that adds 20 maximum health, while three tomatoes make Sunset Soup for a 12% power bonus. Only one meal can be packed at once, and its effect lasts for that fight. Roses take a different route: give one to a resident who is home to add three affection, subject to a half-hour wait between gifts to the same person. They do not count as food.

Farming connects directly to shelter planning. The garden room produces food and contributes irrigation; a worker assigned to the garden can improve crop growth, and a matching specialist provides a further boost when available. Generator levels and Shelter research also affect growing conditions. Upgrading racks adds capacity, while purifiers add water supply, so the useful investment depends on whether you need more plots or more reliable irrigation.

The shelter advances with elapsed time while you are away, within its offline production limit, and crops can progress during that period. Harvesting remains a deliberate action: the system does not automatically pick ripe produce or claim it into the pantry for you. A garden therefore rewards returning to check on the plots, use ripe crops, and line the next planting up with the food or combat supplies your campaign needs.

Iris is the campaign’s botanist, but her rescue is tied to later sector progress and the current demo roster makes only Mara available. The farming system is usable as a shelter feature without presenting Iris as an immediately playable gardener.