Flora are plants which exist in Spore as means of food for herbivores and omnivores. Carnivores may consume them ingame during the Creature Stage, but will vomit it out, providing no use to satisfying the creature's hunger or health.
In the Cell Stage, Green plant matter and later, Seaweed, are used as food for herbivores and omnivores. Unlike in the Creature Stage, when carnivores vomit upon eating fruit, they will simply ignore it. In the creature stage, fruit can be picked up and eaten by omnivores or herbivores. There are sometimes pieces of rotting fruit. Rotting pieces of fruit appear to be inedible, but can be consumed. In the Tribal Stage, an omnivorous or herbivorous tribe can pick fruit from plants. Herbivores can use fishing spears to harvest seaweed from the ocean. Oddly enough, herbivores can also eat eggs harvested from domesticated animals. Other tribes often have fruit in their food piles.
In the Civilization Stage, flora plays no important role other than decorating the Homeworld. In the Space Stage, however, planets are essential to stabilising a planet's atmosphere. There are three different types of flora: small, medium, and large. Every planet can have three of each if fully terraformed to a T-3. Each Terra score level requires one more of each of the three kinds of plants, plus two herbivores and a carnivore. Some empires will offer the player missions to retrieve a plant.
In Galactic Adventures, plants are decorative in adventures, and can also be used as obstacles. There are two types of plants, plants that are in the same category of props (rocks, staffs, huts and beach balls are a few examples), and plants that are procedurally generated by the game in the "Flora" section in the Terraforming menu. The way Flora are generated in the "Flora" Terraforming menu is very much like (or most likely the same) how they are generated in planets. Like T-3 planets, the Terraforming Menu only will support only three plants in the three categories. Plants as props do not need to be in the "Flora" Terraforming menu to be used as a prop. They can be interacted with goals, unlike other plants. As they are props, they can't be destroyed.
- The Flora Editor was intended to be included in Spore, but was ultimately cut, and unplayable without the use of hacks.
- There is a known glitch in the Space Stage. When a plant is being deposited, it grows. If you aim the abduction beam towards the sky, and keep the plant in the air long enough, it gets bigger. When you set it down on the planet's surface, the plant will be much larger than the rest surrounding it.