Magic items: A Botanical Guide to Barovia

Backwoods Key: will open any door, but the destination on the other side is... unexpected.

Forest Ranger's Hat: allows a character to cast druidcraft to put out small fires.

Circlet of Flowering: spend a bonus action to make it flower, gain temporary attributes.

Shield of Ages: +1 bonus, immunity to magic aging and the slow spell.

Staff of the Forest: allows its wielder to cast Plant Growth, Speak with Plants, Grasping Vine, or Wall of Thorns a limited number of times.