Watering dream meaning is explained below using 3 different sources. Each interpretation is shown with its source.

Interpretation 1 — Ibn Seerin

(Drink one’s fill, Quench one’s thirst, Irrigation) To drink one’s fill after being thirsty in a dream means satisfaction and ease in one’s business, end of one’s difficulties, richness after poverty, repentance from sin, recovering from sickness, continuing one’s education after a long interruption of one’s studies, attending to one’s spiritual interests, or it could mean inclining toward a religious life. Quenching one’s thirst in a dream also means being healthy, religious and rightful.
Source: Islamic Dream Interpretation Author: Ibn Seerin

Interpretation 2 — Nancy Wagaman

Watering plants (with a watering can, sprinkler, etc.) could represent: Abundance.

Assistance.

Physical, emotional, mental, or spiritual nourishment.

Satisfaction.

A process that delivers something that’s needed.

A delivery channel for something tangible or intangible.

A connection, route, or pathway.

See Plant, Hose, Water, Wet, Rain, Garden, Lawn

Source: The Curious Dreamer’s Dream Dictionary Author: Nancy Wagaman

Interpretation 3 — Tyler Wolfe

Symbolic of generous giving, Prov. 11:25
Source: Christian Dream Symbols Author: Tyler Wolfe