This item is acquired in-game. See its sources below.
A Rare Miscellaneous, item level 1, binds when picked up.
First seen in build 12.0.7.68887 (Midnight (patch 12.0.7)).
Blizzard numbers items as they are created, so the named items next to ID 221548 (221540 to 221550) were usually added in the same batch as Blightbud: the same quest line, zone, vendor or reward set.
Ensemble: Black Tropical Beachwear ID 221540 · ConsumableEnsemble: Blue Tropical Beachwear ID 221541 · ConsumableEnsemble: Sunny Tropical Beachwear ID 221542 · Consumable "The perfect outfit for lounging along the shores of Stranglethorn Vale."Ensemble: Pink Tropical ID 221543 · Consumable
Nightfarm Growthling ID 221546 · Miscellaneous "Teaches you how to summon this companion."
Boskroot Cap ID 221550 · Miscellaneous "This mushroom grows in the Boskroot Basin. While the local fungarians sees it as a delicacy, it is otherwise..."The raw ItemSparse values for item 221548 in the current client build.
Read from the World of Warcraft client build files: Item, ItemSparse, Lock, Holidays, AreaTable and CollectableSourceVendor.
TheWoWDB