The house has gone quiet, and the tap runs cold across your knuckles.
Above the roofline the moon has climbed clear of the chimneys, small and hard and very white, the way it looks on a night when the air has no softness left in it.
You set a glass jar on the sill where that light can reach it. Nothing happens that a camera could catch. The water simply sits, carrying a pale coin of borrowed brightness on its surface, and you leave it there until the sky turns grey.
That is moon water. All of it, and none of it.
What the Jar Is Actually Doing
Moon water is water left beneath the moon in a vessel, held there with intention, and kept afterward for use in the craft.
The water does not become another substance overnight. It does not glow, thicken or hum against the glass. What changes is smaller and harder to name. A jar of ordinary water becomes a marked thing, set apart from the water in the tap, tied by memory to one particular night and one particular sky.
Witches have always worked this way with humble matter. A stone becomes the north. A candle becomes the will. A jar of water becomes the moon, carried indoors and set on a shelf.
Whatever you understand to be happening inside the glass, the plain part is this. The practice works on you. It sends you outside at an hour you would otherwise sleep through, and it makes you look up.
Why Water Takes the Impression
Of the four powers, water is the one that receives.
Earth holds. Air moves. Fire consumes. Water accepts the shape of whatever contains it, keeps the cold of the night it stood in, and gives back the face of anything that leans over it. In the circle it waits in the west, in the quarter of tide and grief, blue and silver and black.
The moon is a mirror too, throwing back a light that is not hers.
Two reflecting things, set facing one another across the dark. That is the whole poetry of the practice, and it is enough of a reason.
Choosing the Phase
Most practitioners set the jar out at the full moon, when the light is unmistakable and the whole sky seems to lean toward one white stone.
The other phases are worked for different reasons, and the choosing is part of the rite.
- Full moon — water gathered for blessing, for clarity, for work already begun and needing strength.
- Waxing moon — water for things you wish to grow, drawn as the crescent fattens toward the round.
- Waning moon — water for washing, releasing and putting down.
- Dark moon — water for the quiet, hidden work, gathered under a sky with no moon in it at all.
- An eclipse — kept separately, or not gathered at all, depending on whose counsel you follow.
Some witches also mark the named full moons across the year, keeping a small jar from each, so the shelf becomes a calendar of cold months and green ones.
The Vessel
Glass is the old friend here. It shows the water, takes no taste, and holds nothing back from the light.
A clean jar with a lid that seals is enough. A wide bowl is beautiful for the night itself, though a bowl loses water to the air and gathers whatever the wind is carrying.
Avoid unlined copper, brass and old pewter for anything you intend to keep, since those metals do not sit harmlessly with water and acidic liquids over time. The metals of the craft each have their own cautions, and silver-coloured does not mean silver.
Wash the jar properly before you begin. A rite does not clean glass.
Which Water to Pour In
Tap water is the ordinary choice, and there is nothing lesser about it. It has already fallen as rain, run through stone, and travelled dark miles beneath the street to reach your hand.
Filtered water, bottled spring water and cooled boiled water are all used. Choose one and be consistent, so that the jars on your shelf are comparable to one another.
Fill the vessel to somewhere below the shoulder. Water expands when it freezes, and a sealed jar left out on a hard winter night can crack.
Setting the Jar Out
You will need:
- A clean glass jar with a lid
- Water of your choosing
- A cloth or small plate to stand it on
- A label and a pen
- A candle, if you keep one for such things
The rite itself is short.
- Wash and dry the jar, then fill it, leaving a hand’s width of air beneath the lid.
- Carry it to a windowsill, a step, a balcony rail or a table in the garden, wherever the moon can be seen or, on a clouded night, wherever the moon would be.
- Stand for a moment with both hands around the glass. Let the cold of it come into your palms.
- Speak your purpose once, plainly. Say what the water is for, not what you demand of it.
- Leave the jar through the dark hours.
- Bring it in before the sun climbs, unless you intend to make sun water instead.
- Label it with the phase and the season, seal it, and put it somewhere dark and cool.
Indoors behind glass is entirely acceptable, and safer in a place where a jar on a step might be knocked, taken or found by an animal.
The Nights the Moon Does Not Come
Cloud will take the moon from you more often than clear sky will give it.
The moon is above the cloud regardless, unchanged, dragging the sea about as it always does. Most practitioners set the jar out anyway and consider the working kept.
If that answer does not satisfy you, wait a month. The moon is patient, and so is the shelf.
What Must Not Go Into the Jar
The temptation is to improve the water. Resist most of it.
Do not drop stones into water you intend to keep. Some minerals dissolve, some carry metals you would rather not have in a liquid, and some crumble into dust. That whole hazard belongs to a page of its own, and it is worth reading before a single crystal touches a glass of anything: the stones that must not touch water.
If you want a stone present, set it beside the jar, on the outside of the glass, where it can keep company without leaching.
Fresh herbs and flowers turn quickly in a sealed jar. Salt makes a water that will scorch plants and pit metal. Both have their uses, but they belong in workings prepared and used the same night, not in something stored.
Water That Has Stood Is Not Drunk
This is the line that does not move.
Water that has stood open to the night, or sat sealed in a cupboard for weeks, is not a drink. It is not added to tea. It is not sipped from the cup at the close of a rite. Standing water grows things too small to see, and a jar on a windowsill collects dust, insects, pollen and whatever the air was carrying.
The same holds for moon water made from rain, dew, river, sea or melted snow, however clean the source looked.
Moon water is for anointing objects, for washing, for the bowl and the threshold. When a rite calls for something to be swallowed, pour fresh water from the tap, and let the moon water do the work it is fit for.
Take the same care with skin. Water gathered from the ground, a gutter or the shore does not go on broken skin, near eyes, or on anyone unwell.
Other Waters a Craft Keeps
The moon is not the only sky worth catching, and a well-kept shelf holds several waters, each with its own weather in it.
Sun water. The jar left out through the bright hours instead of the dark ones, used when a working wants heat, courage and visibility rather than depth.
Rain water. Caught in the open with a wide bowl, never taken from a roof or a downpipe, since a roof gives its water everything the roof has been holding. Rain is used for cleansing and for beginnings.
Storm water. Rain caught while thunder is working, kept for the workings that need force behind them. Set the vessel out before the weather arrives and fetch it afterward. Standing outside in a thunderstorm to gather it is not devotion.
Snow and hail melt. Gathered from a clean fall on grass or a cloth, never from a path, a road edge or anywhere salted and driven over. Snow water carries stillness and suspension.
Dew. A cloth dragged across grass at first light and wrung into a jar. Folk custom in parts of Britain and Ireland remembers washing the face in the dew of May morning, and the dawn of Beltane is still the morning most people go out for it. Avoid verges and lawns that may have been treated.
River and stream water. Moving water, gathered upstream of where people gather, used for carrying things away.
Sea water. Salt, tide and a very old indifference. It corrodes metal, kills plants and never goes near a wound. Sea salt water is for cleansing objects that can take it, and for pouring back.
Spring and well water. Beautiful and not automatically safe. A spring that looks clear is still a spring of unknown character.
Wherever you gather from wild ground, a shore or a watercourse, check what is permitted where you live before you take anything.
Labelling and Letting Go
Label every jar the night you make it. Phase, and the season or the moon’s name. Written on the lid or on tape around the shoulder, since ink fades and memory fades faster.
Keep the jars in a dark, cool cupboard rather than on a bright sill. Light and warmth are the two things that spoil stored water quickest.
When a jar turns cloudy, grows a film, throws a floating thread or smells of anything at all, that jar is finished. Pour it away without ceremony and without guilt. The moon will be back.
What Moon Water Is Used For
Moon water is used when you wish to bring the character of a particular night into a working done later.
It is dabbed on the rim of a bowl, sprinkled across a threshold, brushed along the edge of a mirror, added to the wash water for a floor or a doorstep. It fills the dark bowl for scrying, where the surface must be still and the room dim.
A little goes into the final rinse of a ritual bath, and a little onto the fingers before you open a circle.
It is also used to mark a new tool, though the full rite of making a thing yours, second-hand objects included, is set out in its own working. Moon water is one ingredient of that, not the whole of it.
Pouring It Away
Water asked to carry something should not simply sit forever on a shelf.
Plain moon water goes to the roots of a plant, to the earth outside, or down the drain with a word of thanks. Salted water goes to the drain and never onto soil you care about.
Water from a banishing is poured out away from the house, at a distance, and the jar is washed before it is used again.
A Small Jar and a Long Habit
Years of this leaves you with a cupboard of quiet glass, each jar the record of a night you went outside in the cold.
The water in them looks identical. It is you who can tell them apart.
And on some clear night, when the moon comes up hard and white over the roofs and you find yourself reaching for a clean jar without deciding to, the practice has done the thing it was always for.