There are different techniques how to make plantlets build roots. The way I am about to show you can also be used for cuttings from plants. And you can observe the progress which is very nice.
I use the beautiful and easy to handle Chlorophytum Comosum Ocean for this instruction.
Step 1: Equiptment
Plant which builds plantlets
Piece of fabric
Step 2: Disinfect the Knife an the Container
It is important to disinfect the
equipment because bacteria make the plantlets rot and decay.
We do not want that to happen.
Step 3: Prep the Container
Now create a grid with the ribbon on the plastic container.
This makes it easy to place the plantlets later. We want them to be with the bottom in water and to keep their little leafs dry.
Step 4: Decoration
You can decorate the container as you like.
An old piece of fabric wrapped around the container looks nice.
I kept the sides open for watching the roots.
Step 5: Remove the Stems From the Plant
Cut the stems with the knife as near as possible to the center of the plant.
Without the stems the plant will have more growth and it gets pretty and thick.
Step 6: Prep the Plantlets
The bigger the plantlets are the bigger is the chance they will start building roots.
They need at least to be about 2 inches (that is what I was reading).
Remove the plantlets from the stems. Just pull a little and they will come off easy.
Please eliminate the blossoms and very small leaves because these parts can rot in the water.
Step 7: Insert the Plantlets
Fill the container with water and place the plantlets in their hotel!
Make sure the part where they build roots is in the water.
The best place for the rooting plantlets is warm and bright but without direct sun.
If it is very cold they do not grow.
Please check the water 1-2 times a week.
When the roots are about 1.5 inches long they are ready for beeing moved into flower soil.
I wish you and your plantlets (or cuttings) the best and much sunshine. :D