You can get Lotus Pistils from the sniffer digging.
Lotus Pistils Stats :
Stack Size : 16
You can place Lotus Pistils on Lily Pads to start growing a Lotus Flower!
If you have a mod like Amendments you may need to shift and interact with the Lily Pad to place the Lotus Flower!
You can get bleachdew from interacting with an empty hand on the fully bloomed Lotus Flower! Breaking a fully bloomed Lotus Flower will not drop bleachdew but will give you the lotus pistil back!
You can stop the Lotus Flower from growing by interacting with it with shears like you can with Vines in Minecraft! A sheared lotus flower will not grow anymore and won't drop any bleachdew!