Gadenin日本語Get the appPups are the only practical method
Air plants can be raised from seed, but it takes several years to reach any size and the seed needs conditions most people cannot easily provide indoors. In practice, propagation means pups: the small offsets that a plant produces from around its base after it has flowered.
This is why flowering is worth chasing rather than mourning. A parent that blooms will usually go on to make two or three pups, each of which becomes a full sized plant and flowers in its own turn. One plant that flowers is how a collection of one becomes a collection of six over a few years.
| Method | Time to a display sized plant | Difficulty | Worth doing? |
|---|---|---|---|
| Separating pups | 1 to 2 years | Easy | Yes, this is the standard method |
| Leaving pups attached as a clump | Immediate, grows over years | Easiest | Yes, if you want a mass rather than singles |
| Growing from seed | 4 to 6 years | Difficult indoors | Only as an experiment |
| Cutting the plant up | Never | Not possible | No. A cut piece has no growing point |
There is no equivalent of a leaf or stem cutting here. A leaf pulled off an air plant will not root. Everything depends on the pups.
Finding the pups
Pups emerge from between the lower leaves at the base of the parent, usually two to six months after the flower fades, though some appear while the bloom is still colorful. They start as small pointed shoots that look like a leaf growing in the wrong direction, and it is easy to miss the first one.
Look at the base of any plant that has flowered every couple of weeks. Ease the lower leaves apart gently with a finger rather than pulling at them. If you find a pup, change nothing: keep soaking, keep feeding, keep the same position, and let the parent do the work of raising it.
When and how to separate a pup
The rule that matters is size. A pup separated too early has too little leaf area to support itself and usually dwindles and dies over the following months. Wait until it is roughly a third to a half the size of the parent, which typically means several months of patience after you first spot it.
- Wait for the size The pup should be at least a third of the parent's height, with its own distinct rosette of leaves rather than a few leaves emerging from the parent's base. If in doubt, wait another month. There is no cost to waiting and a real cost to hurrying.
- Hold both plants at the base Grip the parent's base in one hand and the pup's base in the other, as close to where they join as you can get. Holding either plant by the leaf tips will simply tear the leaves off.
- Twist and pull gently downward Use a slight twisting motion combined with a firm, steady downward pull. A ready pup separates with a small snap and takes a piece of its own base with it. If it resists strongly, it is not ready. Put it down and wait.
- Cut only if it will not part If you must separate one that is joined very tightly, use a clean sharp blade and cut as close to the parent as possible without cutting into the pup's own base. Let both cut surfaces dry in moving air for a day before the next soak.
- Treat it as a normal plant immediately Soak the separated pup as usual, dry it upside down, and put it in bright indirect light. There is no special recovery regime, but do not soak it on the same day you separated it if you had to cut.
Separate pups when the room is warm, in spring or summer, rather than in the middle of winter. A pup separated into cold conditions sits still for months and is more vulnerable to rot at its fresh base.
Or leave them attached and grow a clump
You do not have to separate anything. Left alone, the pups grow while the parent slowly browns away between them, and after a few generations you have a dense clump of many plants sharing one base. Clumps flower in waves rather than all at once, and a mature one is far more impressive than any single plant.
The trade off is watering. A clump holds a great deal of water between the leaves where they press together, and it dries much more slowly than a single plant. Soak a clump as normal but shake it out harder and for longer, and give it a genuinely airy position. A clump left to drip dry in still air rots from the middle outward and you will not see it until it is well advanced.
| Approach | Advantage | Drawback |
|---|---|---|
| Separate every pup | Each plant grows fast and flowers sooner | More individual plants to soak and dry |
| Leave them all attached | Impressive mass, waves of flowers | Dries slowly, real risk of rot in the center |
| Separate some, keep some | Spreads the risk both ways | Needs you to track which plant is which |
Looking after the parent, and keeping track
After the pups are away, the parent has usually spent itself. Keep it going as long as it stays green, because it can occasionally produce a second flush of pups, but do not be surprised when it browns out entirely. Pull the dead leaves away gently as they dry rather than cutting into anything still green.
Keep a note of the date each pup appeared, the date you separated it, and which parent it came from. Two or three seasons of those notes tell you exactly how long the cycle takes in your conditions, and they let you predict when to expect the next generation instead of checking hopefully every week. Noting the position each parent was in when it flowered is worth as much again, because that is what you will want to repeat.
Label a newly separated pup with its separation date. A year later, a shelf of similar looking plants is impossible to sort out from memory, and knowing a plant's age tells you whether to expect a flower.