What is this? mold?

[eggshell]

 

[Marck]

Greetings, welcome to the Forums.

This looks like a rooted leaf cutting of Variegated Heart-leaf Hoya (Hoya kerrii 'Variegata') that is beginning to rot. So yes, it is a mold or similar fungus.

By the way, a rooted Hoya Leaf will not develop into an entire plant. It will only remain a leaf and will eventually die as it cannot grow further. Such leaves of Hoya kerrii are sometimes sold as novelties around St. Valentine's Day.
If you want to propagate a Hoya vine you must use a stem cutting.

 

[eggshell]

Greetings, welcome to the Forums.

This looks like a rooted leaf cutting of Variegated Heart-leaf Hoya (Hoya kerrii 'Variegata') that is beginning to rot. So yes, it is a mold or similar fungus.

By the way, a rooted Hoya Leaf will not develop into an entire plant. It will only remain a leaf and will eventually die as it cannot grow further. Such leaves of Hoya kerrii are sometimes sold as novelties around St. Valentine's Day.
If you want to propagate a Hoya vine you must use a stem cutting.

thank you marck
so there is no way to keep the single heart leaf alive much longer? once it starts browning

 

[Marck]

I'm afraid so, it looks like its on its way out.