From Guild Wars 2 Wiki
Cultivated Shoot is one of many items needed to craft a Cultivated Vine backpiece.“
Growth seems to be slowing. You need an extra kick of sun to speed back up the growth process. Something like an Attuned Grow Lamp would be perfect.
— In-game description
- Double-click on Package of Oasis Soaked Plant Food to transform Cultivated Sprout into Cultivated Shoot.