Notice the setting and your contact with it: watching water is different from crossing it, and tending a plant differs from finding it already growing.
Start with the closest scene, then check the details that differ. The interpretations are possibilities to examine, not predictions or a universal symbolic code.
Water may appear through a remembered place, a recent experience, or a scene about entering, crossing, containing, or being carried by something. The useful question is how you relate to it: swimming confidently, being swept along, and watching from a safe shore involve different amounts of choice and effort. Your swimming history and feeling in the scene should lead the reading.
Rain may come from recent weather, a remembered day, travel plans, or a scene in which something changes around you. Whether it nourishes a garden, interrupts an event, or soaks you when shelter is unavailable matters more than the fact that it is raining. Your reaction distinguishes welcome change from inconvenience or exposure.
Grass may recall a yard, a sports field, a holiday, a landscape, or maintenance you have been thinking about. Its role changes with your movement: resting on it, cutting it, and pushing through grass too tall to see ahead are different experiences. Start with the place and activity rather than assuming green grass promises growth or prosperity.
Flowers may recall an occasion, a person, a garden, a gift, or an image that caught your attention. Ask what you are doing with them: receiving a bouquet, tending plants, finding them wilted, and moving through a whole field create different stories. Your relationship to the occasion matters more than a rule that flowers always mean happiness or love.
Earth or soil is a salient material in the dream: it is touched, dug, carried, planted in, spread, or encountered where it changes the scene. Here dirt means earth, not a general judgment that something is dirty.
The scene combines an expansive landscape with an unusual way of moving through it. If you feel delighted and can choose your direction, a wish for space, play, or an enjoyable experience may be worth exploring. If you cannot land or reach the flowers, the important feeling may instead be distance from something attractive. A remembered landscape or fantasy image could also supply the scene.
The Uncanny Post