Gadenin日本語Get the appWhen it needs remounting
A staghorn fern does not get repotted on a schedule the way a houseplant does. It gets remounted when it has physically outgrown what it is on, which for most plants means every three to five years. Disturbing it more often than that sets it back for a season with no benefit.
The signals are easy to read. The shield fronds have grown out past the edge of the board and are curling around into the air with nothing to grip. The plant has become top heavy and the board tips or sags when you hang it. The moss behind the shields has broken down into a dark, fine, sour material that stays wet for days. Any one of those is reason enough to remount.
The best time is spring or early summer, in the first flush of active growth, when the plant will grip its new mount within a few weeks. Remounting in winter leaves an unattached plant sitting cold and still for months.
| Sign | What it means | Act now? |
|---|---|---|
| Shields curling off the edge of the board | Outgrown the mount | Yes, next spring |
| Moss dark, fine and always wet | Medium broken down and holding water | Yes, this is the urgent one |
| Plant tips forward or the board flexes | Too heavy for its backing | Yes, onto a larger board |
| Shields brown and firm but still flat on the board | Completely normal | No, leave it |
| A few small pups around the base | Healthy plant, offsets forming | No, remount only if crowded |
What you need
The materials list is short and none of it is specialized. The important choices are a rot resistant board and a fixing that will not cut into the plant as it grows.
| Item | Specification | Why |
|---|---|---|
| Board | Untreated hardwood or cedar, at least twelve by twelve inches (30 by 30 cm) and an inch thick | Must outlast years of soaking without warping or rotting |
| Sphagnum moss | Long fiber, soaked and squeezed out | Holds water without turning to mud |
| Fixing | Fishing line, plastic coated wire or wide nylon strapping | Must not rust or bite into a swelling shield |
| Hanger | Heavy duty hook or bracket rated well above the wet weight | A soaked mature mount can weigh over twenty pounds (9 kg) |
| Spacers | Two small blocks behind the board | Keeps air moving behind the mount |
Avoid pressure treated timber and anything varnished. Treated wood leaches chemicals into a permanently wet moss pad, and varnish stops the board breathing so the back stays wet.
Doing the remount
Work over a table with the board flat in front of you. The whole job takes about half an hour. The one thing to hold in your mind throughout is that the plate of brown shield fronds and the root mass behind it are a single structure, and you are moving it as one piece.
- Free the plant from the old mount Cut the old ties rather than unwinding them. If the plant has grown into the old board, cut the board away behind it or leave a slab of it attached and mount the whole assembly onto the new board. Prising the plant off a surface it has gripped tears the roots.
- Leave the old shields exactly as they are Do not pull, trim or tidy the brown shield fronds, and do not pick out the material behind them. That pad is the plant's root housing and its water store. Removing it is the most damaging thing you can do to a staghorn.
- Build a mound of moss on the board Soak the sphagnum, squeeze it until it stops dripping, and pile a mound roughly eight inches (20 cm) across and two to three inches (5 to 8 cm) deep slightly above the center of the board. The plant sits on this, not flat against bare wood.
- Set the plant with the antlers pointing up and out Place the root ball on the mound with the shield fronds flat against it. The antler fronds must hang downwards and outwards, the way they would on a tree trunk. Mounting it upside down is a common and permanent mistake.
- Tie it on across the shields Run fishing line back and forth across the face of the shield fronds and around the board, six or eight passes, firm enough that nothing shifts if you tip the board vertical. Crossing the brown shields is correct and does them no harm.
- Soak it and hang it in shade Soak the finished mount for twenty minutes, drain it fully, and hang it somewhere bright but shaded with air moving behind it. Keep it out of any direct sun for the first month.
The first few months after remounting
The plant is not attached to anything yet, so it dries faster than it did before and it cannot yet pull water from the board. Check the weight every few days for the first month and soak sooner than your old interval.
Growth appears in a predictable order. A new shield frond comes first, pale green and soft, and spreads over the moss to grip the board. Antler fronds follow once that shield has hardened off. Seeing a new shield within two months is your confirmation that the remount worked.
Write down the date you remounted it, the size of the board and what you used for moss. Three years later, when you are wondering whether it is due again, that note answers the question in a second and tells you whether the material you chose held up.
The fishing line can be left in place permanently. Over a few years new shield fronds grow over it and hide it, and the plant grips the board on its own. Cut it away only if it is visibly cutting into a living shield.