Wedding bouquet shadow box: dry the flowers, then frame

A bouquet goes into a shadow box in two stages. First the flowers are dried, fully, because fresh flowers sealed behind glass rot. Then the dried flowers are arranged on a backing, fixed in place and sealed in a box deep enough that nothing touches the glass. The first stage is the one with a deadline: start as soon as you can, within a day or two of the wedding if possible, while the flowers are still firm.

The drying methods and times here come from two university extension services that publish guides to drying flowers: the University of Missouri’s Drying Flowers and Foliage for Arrangements (guide G6540, reviewed in 2022) and Clemson University’s Drying Flowers (factsheet HGIC 1151, first published in 1999).

The first two days

Missouri’s guide is firm on one thing: “Never place wilted flowers into drying mixtures.” A flower dries in the shape it has when it goes in. “Poor shapes dry as poor shapes.”

• Keep the bouquet in water, somewhere cool and out of the sun, until you can deal with it.
• Photograph it from the front, the side and above. This is your pattern for rebuilding it, and the record of its true colours.
• Decide what to keep. Neither guide dries a bouquet as one mass: Missouri hangs flowers in small bunches and large heads singly, and in a drying agent each flower is buried on its own. Choose the best flowers, dry them one by one, and rebuild a smaller version.
• Keep the ribbon, the pins and a length of the wrap. They go back on at the end.

If the day has passed and the flowers have already dried by themselves in a vase, they can still be used. They may be more shrunken and less colourful than flowers dried on purpose.

Choose a drying method

Method	Time	Result	Best for
Silica gel	3 to 8 days	Closest to the fresh shape; colours darken	Roses, peonies, dahlias, most bouquet flowers
Air-drying, hung upside down	2 to 3 weeks	Stiff, smaller, a muted antique look	Baby’s breath, statice, heather, hydrangea
Pressing	Weeks; change the paper after the first	Flat	A shallow frame, or petals and small flowers
Freeze-drying	Sent away	The most lifelike	Anyone who wants the whole bouquet kept as it was

Missouri calls silica gel “the most satisfactory material for drying flowers at home”. Clemson says it suits “flowers with closely packed petals such as roses”. Missouri describes freeze-drying as “perhaps the most effective, or realistic, method”, but one that “requires expensive equipment and is best left to professionals”. If that is what you want, book it before the wedding, because the flowers have to reach the firm while they are fresh.

Drying in silica gel

Silica gel is a sand-like drying agent sold for flowers. It can be dried in an oven and used again.

1. Take the bouquet apart. Cut each flower with a short stem. Clemson suggests about half an inch. If you want long stems in the box, dry the stems separately by hanging them, and rejoin them later with florist’s wire and tape.
2. Wire the heads now if you plan to. Missouri: “Wiring those flowers before drying will make them easier to arrange later.” Dried flowers are brittle.
3. Put 2.5 to 5 cm (1 to 2 inches) of gel in an airtight box. A tin or a plastic tub with a tight lid.
4. Stand each flower in the gel, face up, not touching its neighbours.
5. Fill round the flowers, not on them. Clemson’s method: pour the gel round the edge of the container and tap the side, so that it flows in under and between the petals and does not weigh them down. Carry on until the flowers are covered, then add about 2.5 cm (an inch) more on top.
6. Seal the lid. Missouri: if the container is not sealed, the gel “absorbs moisture from the air, and flowers dry too slowly or not at all”.
7. Wait. “Flowers should dry in three to eight days.” Missouri’s table gives two to three days for a rose, a peony or a dahlia, and three to four for stock. Check one flower before uncovering the rest.
8. Lift them out gently. Pour off the gel until the petals show, slide your fingers beneath the flower and lift. Brush off the dust with a soft, dry paintbrush.

Timing matters at both ends. Missouri again: “If removed too soon, petals will droop. If removed too late, petals become brittle and break easily.”

Air-drying

Strip the leaves, tie the stems in small bunches with a rubber band, which tightens as the stems shrink, and hang them upside down. Missouri’s conditions: “a warm, dry, dark area such as an attic, closet or furnace room”, with air moving and no direct sun, for “two to three weeks”. Large heads such as peonies and hydrangeas are hung singly.

Clemson notes what to expect: “Blue and yellow flowers retain their colors when air dried, but pink flowers fade. Roses and peonies shrink somewhat”. The darkness matters: it “helps preserve the flower color”.

What the colours will do

Dried flowers are not the colours of the wedding day, and it is better to know that now.

• In a drying agent, “colors will darken”. Deep reds, purples and blues “may appear almost black after drying”. “Whites generally develop a cream or tan color.” (Missouri.)
• They go on changing. “Do not consider dried flowers everlasting”, Missouri says. “Even the best dried flowers gradually fade.”

Keep the finished box out of bright light and away from damp. If the true colours matter most to you, frame a good photograph of the bouquet beside the dried flowers, or in their place.

Build the box

Depth. Measure the thickest flower once it is dry and add 10 mm so that nothing presses on the glass. A dried bouquet usually needs 90 mm or more inside. Pressed flowers need about 20 mm. How to make a shadow box shows how to build a box to a depth or deepen a frame.

Backing. Foam board covered in linen, cotton or good paper. Pale, plain backings suit dried flowers, whose colours are soft.

Fixing the flowers. Dried flowers weigh almost nothing, so the job is to stop them shifting, not to carry weight.

• Wired flowers: push the wire stem through the backing and bend it flat behind, with a piece of tape over the end.
• A bunch with stems: tie the stems to the backing with thread or thin ribbon through two small holes, in two places. Then wrap the original ribbon over the ties.
• Loose heads and petals: a small dot of clear-drying craft glue under the base of the flower. The flowers are not going to be taken out and worn again, so glue is reasonable here. Missouri uses it too, to hold petals on flowers that shed: “Use a glue that becomes clear after drying.”
• Paper things from the day, such as the invitation or a place card: photo corners, not glue.

Work from the back of the arrangement to the front, and handle each flower by its stem or base. Use tweezers for the small ones.

Seal it. Dried flowers are eaten by household insects, and they take up moisture from the air. Missouri warns that insects “chew on the soft tissue of the plant centers” until “flowers may shatter and fall apart”, and that “tightly sealed containers prevent insect invasion”. So close the back firmly and tape the join between the backing and the frame all the way round. For microwave-dried flowers, which “tend to absorb air moisture”, Missouri suggests a spray of hair spray or lacquer; try it on a spare flower first.

Hang it out of direct sun, away from radiators, and not in a kitchen or bathroom.

Add paper flowers, or use them instead

Dried petals lose colour, and cut paper flowers can put it back. A box can mix the two: the dried flowers in the centre, with paper flowers and leaves filling out the shape. The free library has files for this, ready for a cutting machine or scissors:

• Rolled flowers: spiral strips of card that roll up into roses, peonies and dahlias about 30 to 40 mm across.
• Paper flowers: templates for a rose, a poppy, a dahlia and others, each with every petal it needs on one sheet.
• Roses and wreaths as flat cut shapes for a border.

Cut them from card in the colours in your photograph. They are a companion to the real flowers, or a stand-in if the bouquet did not survive. They do not preserve anything.

For names and the date, Text to SVG makes cutting outlines of any wording, sized in millimetres.

If something goes wrong

What you see	Cause	What to do
Petals drooped after drying	Taken out of the gel too soon, or damp air since	Try them in dry gel for another day or two; seal the box
Petals shatter at a touch	Left in the gel too long	Handle with tweezers; a drop of clear glue at the base holds a loose petal
Brown, shrunken flowers	Dried too slowly, or already wilted	Use them for texture and add paper flowers for colour
Mould or a musty smell in the box	Flowers were not fully dry when sealed	Open it, discard anything mouldy, dry the rest again
Fine dust and holes	Insects	Missouri’s advice is to destroy infested material and clean the container thoroughly
Colours much paler after a year	Light	Move the box out of the sun. The fade cannot be reversed

Questions

How soon must I start? While the flowers are still firm. Neither guide gives a number of days; Missouri’s rule is that wilted flowers never go into a drying agent. A day or two is our caution, not a tested limit.

Can I dry the bouquet whole? You can hang it whole, and it will dry as a tight, shrunken bunch. For a bouquet that looks like itself, dry the flowers singly and rebuild it.

How long will it last? Missouri’s guide says dried arrangements are best replaced yearly, “but with good care they often last longer”. Sealed behind glass and kept from bright light and damp, the flowers are well protected. They will still fade slowly.

Can I use the microwave? Yes, with silica gel round the flowers. Missouri gives about one to three minutes depending on the flower, with a cup of water in the oven, and 12 to 24 hours in the gel afterwards. It notes that results vary and that “experimentation will be required”, so do not learn on the bouquet.