With any cut you receive check there is at least 1 set of mature leaves. With acicularis you can tell the mature ones by that they are stiffer than the immature ones. Immature leaves on any cut can't sustain enough energy most times to keep the cut alive and make roots both at the same time.
If you have a set of mature leaves as the bottom set remove 1 of the leaves to open up a node,,,if you have more than one set of mature leaves remove both leaves on the bottom node. Next place it in damp soil mix up to and slightly over the next set of leaves. Place it where it gets bright light during the day.
Putting the soil mix slightly over the next set of leaves gives you 2 sets of nodes to possibly root on any Hoya. Some Hoya's root along the vine stem and some at the node. acicularis for me rooted at the node.
You also can wet and clean spagnum moss with luke warm water and squeeze most all the water out you can and stick the cut in that and put it in a baggie with air blow in to poof it out or stick in a terrarium. Again let it have bright light during the day.
The trick with this one is to draw the roots out with dampness rather than wetness. Both of these methods have worked for me. Id say the spagnum method in a terrarium worked quicker.
Good luck!,,,,,Debbie

Thanks Debbie, you are a wealth of knowledge! I will give it a shot! Wish me luck, either that or let me know if anyone sells a rooted cutting!

Johanna