Each plant costs a certain amount of sun to plant, limiting the number of plants you can place on the lawn at a time. Your planting is also limited by the recharge or the "cool-down" rate of the seed packets. Also, upgrade plants cannot be planted unless the plant of which they are an upgrade of have already been planted, even if you have enough sun for them. The only plants that do not cost sun to plant are the Puff-shroom, its aquatic counterpart the Sea-shroom, and Imitater versions of them; and in Plants vs. Zombies 2: It's About Time also includes Iceberg Lettuce and Grave Buster.
Sun is obtained from sun-producing plants, such as the Sunflower, Twin Sunflower and Sun-shroom and falls from the sky every ten seconds when it is day-time. The player starts every ordinary level with 50 sun, which is enough for one Sunflower. During the Night, Fog and Dark Ages levels, sun-producers are the only way to obtain sun, so some of these plants must be planted to obtain more than the starting 50 sun. Sunflowers produce a normal sun, Twin Sunflowers produce two normal sun, and Sun-shrooms produce small sun until they grow, after which they produce normal sun, growing once more to produce big sun in Plants vs. Zombies 2: It's About Time. Additionally, in Whack a Zombie, Zombiquarium, and Last Stand, zombies can drop sun.
The player cannot obtain any sun in these levels. Instead, they are supplied with plants that come up from a conveyor belt, which do not cost any sun.
Types of sun
Normal sun gives the player 25 sun (50 in Plants vs. Zombies 2: It's About Time). It is the most common form of sun and is given by all Sun-producing plants. It falls from the sky in most game modes.
Small sun is given to you from Sun-shrooms until they grow and are worth 15 sun each (25 in Plants vs. Zombies 2: It's About Time).
Big sun falls from the sky in Sunny Day. It is worth 50 sun each. It is a larger version of normal sun.
Tiny sun is worth five sun, and is given when a plant is removed after a Shovel Refund bonus has been given, providing 25%-75% of the plant's original Sun cost. The maximum amount of sun refund possible without purchasing with real money is 50%, and an additional 25% is available for USD $3.99. Free plants will never drop tiny sun, as they do not cost any sun to plant, and plants before Last Stand waves are started will instead reward 100% of the original cost, regardless of already existent sun refunds.
Large sun is obtained from full grown Sun-shrooms in Plants vs. Zombies 2: It's About Time. It is worth 75 sun.
Sun bombs fall from the sky in Sun Bombs. They are purple until they touch the ground, after then it reverts to normal sun. If the sun bomb is tapped while it is still purple, any plants or zombies nearby will take damage and the player will not be given any sun.
Plants vs. Zombies
|Snow Pea||175||150 in Versus Mode, 100 in Heavy Weapon|
|Repeater||200||150 in Versus Mode|
|Doom-shroom||125||200 in Heavy Weapon|
|Squash||50||75 in Versus Mode|
|Threepeater||325||200 in Versus Mode, 400 in Heavy Weapon|
|Torchwood||175||125 in Versus Mode and in Heavy Weapon|
|Cactus||125||100 in Versus Mode|
|Starfruit||125||175 in Versus Mode|
|Coffee Bean||75||25 in Versus Mode|
|Garlic||50||75 in Versus Mode|
|Gatling Pea||250||Plus 200 for Repeater|
|Twin Sunflower||150||Plus 50 for Sunflower|
|Gloom-shroom||150||Plus 75 for Fume-shroom|
|Cattail||225||Plus 25 for Lily Pad, 200 in Heavy Weapon|
|Winter Melon||200||Plus 300 for Melon-pult|
|Gold Magnet||50||Plus 100 for Magnet-shroom|
|Spikerock||125||Plus 100 for Spikeweed|
|Cob Cannon||500||Plus 200 for two 100 sun Kernel-pults|
|Imitater||Depends on plant being imitated|
|Pole Vaulting Zombie||75|
|Screen Door Zombie||100|
In Survival: Endless, the sun cost of each upgrade plant will increase by 50 for every one of those planted. For example, the player's first Cattail will cost 225 Sun, but their second Cattail will cost 275 Sun.
Plants vs. Zombies Adventures
Note: VIPs do not cost any sun.
Plants vs. Zombies 2: It's About Time
(then 250, then doubles)
|Carrot Missile Truck||450|
|Imitater||Depends on the plant being imitated|
Zomboss Test Lab zombies (Chinese version only)
|Future Conehead Zombie||100|
|Future Buckethead Zombie||200|
Plants vs. Zombies: Garden Warfare
|Boss Mode abilities||Sun cost|
|Coconut Spotting Station||75|
|Twin Heal Flower||100|
Plants vs. Zombies Online
|Peashooter||100, 50 (The first Peashooter only when upgraded)|
|Sunflower||50, 25 (The first Sunflower only when upgraded)|
|Magic Vine||200 (150 when upgraded)|
|Small Bamboo Cage||150|
|Twin Sunflower||50 + 50|
|Repeater||100 + 100|
- The maximum amount of sun the player can get is 9990 in Plants vs. Zombies and 9900 in Plants vs. Zombies 2: It's About Time.
- The 15 sun increments from a small Sun-shroom, the Sun Bean, and shovel refunds are the only ways to get sun that is not in multiples of 25.
- Seeing Stars is another good way to max out the player's sun. If the player uses Garlic and Spikeweeds, along with a couple of Threepeaters, they can have all of the incoming zombies dying automatically with minimal effort, only needing to replenish a Garlic in the middle row. The rest of the empty squares can be filled with Sunflowers and they can collect sun without worrying about being overrun.
- However, in the Far Future trailer of Plants vs. Zombies 2: It's About Time, Tile Turnip's cost was 64000 sun. It is impossible for the player to do so. The maximum sun the player can collect is 9900, but Tile Turnip needs to be planted with 16000 sun before the sun cost doubles twice to 64000.
- In Plants vs. Zombies, Survival: Endless levels and Co-op Endless are the only levels where the cost of plants rises (the cost of upgrade plants rising for every one of each type currently planted on the lawn).
- In Versus Mode, the zombie's currency is brains which works the same as sun. But in I, Zombie, players can collect sun by eating Sunflowers. That is peculiar since zombies need brains, not sun like plants. If the player digs up a plant, he or she does not get back the sun used to plant it.
- In Last Stand puzzles and Last Stand in Plants vs. Zombies 2: It's About Time, the player can get back the sun cost of a plant (unless it is damaged).
- Sun will not fall from the sky during Night, Fog or Dark Ages levels.
- The sun costs of non-free plants are multiples of 25.
- In Chinese version, Sun Bombs are worth 50 sun.