"Well Georgina, a combination of my famous Rejuicing and Regerminating potions ought to do the trick. Six drops of the red Rejuicer followed by three drops of the green Regerminator will be the breath of life to a plant beyond the reach of blackmail."
Tilden Toots responding to a letter from Georgina Smyth on his radio programme[src]

The Rejuicing Potion was a potion produced by famous Herbologist Tilden Toots that treats a dead plant. Six drops of this potion (combined with three drops of Toots's Regerminator) are sufficient to revive a dead Flitterbloom.