A faux plant that is perfect in the box and wrong on the floor has not been bought wrong. It has been unpacked wrong. In our factory runs, the mould can be right, the paint can be right, the pot can be right, and the plant is still a slump by the second week. The variable is what happens in the ten minutes after the box is opened. In most homes that window gets nothing, and the plant starts its working life already bent.

The compression line you can see on the leaf

Every leaf on a shipped plant carries a crease. The plant was folded to fit the box, and the fold left a line somewhere between the stem and the tip. After a week of display, most people have never noticed it, which means it is still there. It sits where the leaf was pressed against its neighbours in the carton, usually within 2 cm of the stem.

Run a finger from the stem tip outward, over the top surface and the underside. Where the crease is, the leaf will not sit flat against the air. It will sit flat against whatever was next to it in the box. That is the compression line. Real leaves have veins and a curve, but they do not carry a straight line that matches the box fold. If you find one, hold the leaf between your fingers and press it gently in the opposite direction. The line is plastic memory, and it comes out. It does not come back, because there is no moisture to set it again.

The 20-degree leaf spread that holds

A shipped leaf is flat against its stem. In the box, the leaves were stacked, and the stack position is what they remember. The first move you make is to fan each leaf away from the stem, outward, to the angle it wants to sit at. For most leaves in our runs that is 20 to 30 degrees off the stem, measured from the stem axis. A leaf at that angle is not touching the stem, so there is nothing to stick it back.

The leaves with wires inside them will hold that spread overnight. The ones without wires will let go within an hour. We watch that difference on the line every day: the same leaf, the same paint, the same shape, the only variable is the wire. If a leaf you have fanned out droops back down by the next morning, the wire inside it is too thin for the leaf it is holding, and no amount of re-fanning fixes that. The fix is a different leaf.

The weight test that takes ten seconds

Put the plant on the floor, or on the stand where it will live. Lean on the canopy, gently, and let go. A plant that falls over and stays down has not been styled badly. It has been weighted badly. The ballast, the weight in the base, is not enough for the height and the leaf mass above it. In our runs, a 1.8 m fiddle leaf with a base under 2 kg will tip on the first lean, every time, and the fix is not to angle the leaves differently. It is a heavier base, or a planter that adds the missing weight.

Do the three checks in the first ten minutes after unboxing. The plant that passes all three holds, and it stays held for the life of the leaf. The plant that fails all three was failing before the ten minutes, and the box just delayed the news.