The Greenhouse Charm was the culmination of the Statute of Secrecy Task Force's research into the Gemino Curse and Herbivicus Charm. The Herbologist Neville Longbottom later provided improvements to the incantation and stance used when casting it.
Celescere is possibly a portmanteau of two words, celerare (Latin for "to quicken or accelerate") and crescere ("to thrive; to multiply" in Latin, and "to grow or cultivate" in Italian). Put together, the resulting incantation can mean to grow (plants) quickly, or to accelerate the growth of the plants, much like the effect of the Herbivicus Charm.
- Harry Potter: Wizards Unite (First appearance)