Nectar is used to turn Pikmin from leaf or bud stages into the flower stage. There are numerous places where nectar is found; Eggs, Ujadani, Iridescent Flint Beetles, Iridescent Glint Beetles, Nectar Weed patches, piles of rocky Rubble, Mitites, Honeywisps, and yellow Unmarked Spectralids can all drop globs of nectar.
There is a premade WarioWare D.I.Y. game called Pikmin. In the game, the throwing cursor moves back and forth. When you tap the screen, Olimar will throw a red Pikmin to the cursor. You must land on the rock where nectar is to win. If you miss, the Pikmin will land in the pond and drown.
Pikmin Adventure
Nectar makes an appearance in Nintendo Lands attraction Pikmin Adventure. Nectar is a common item that can be found inside "?" blocks, and are leftovers from destroyed enemies. When a player collects 3, they will level up. It takes level 5 to get a bud, and level 10 to get a flower. As a Pikmin, you will drop a few drops of nectar when shaken off of an enemy. When your player is hit, they will drop a few drops of nectar, as well.
If you aren't doing very well on a specific stage, the game will eventually spawn a rainbow "!" block near your starting point. Once this block is broken, you will automatically recieve level 50 in nectar.
Monita's Notes
"Nectar is a condensed, highly nutritional food source that has been scientifically proven to encourage a Pikmin's growth. Also, it looks delicious."
Pikmin 3
Nectar behaves differently in Pikmin 3. Instead of the entire drop of nectar being used up no matter the amount of Pikmin that drank it, the Wii U's enhanced memory allows for each Nectar drop to shrink in size according to the amount of Pikmin that drink it, allowing it to be used by multiple Pikmin at different times. This makes it smaller and it allows more than one group of pikmin to get nectar.
Glitches
In Pikmin, the Pikmin can only drink it if the blob is at "full size".
There is glitch that occurs if a drop of nectar, such as one from a petrified enemy, falls on top of a pile of sticks used to build a bridge. If the sticks are removed from under the drop by building the bridge, the drop remains suspended in the air. Pikmin can be made to drink the nectar by throwing them at it, and they will fall back to the ground once the nectar is all used up.
Another glitch can occur if Olimar walks into a drop of nectar and starts throwing pikmin. Sometimes the pikmin will hit the surface of the nectar from underneath and bounce right back in front of Olimar.