Can you graft any non cactus succulents to a cactus?

[KonureKing]

Hey I was just wondering if any species of non cacti succulents would graft on to a species of cactus. I feel like the obvious answer should be no, but I've seen a couple videos on YouTube where it looks like this has been done and the graft has taken. I haven't really been able to find any information on Google confirming or denying this. Any experience or information would be appreciated.

https://youtu.be/d_TLK3z1aHw

[esp_imaging]

No, in general you can't graft other plants onto cacti. A possible exception is species from closely realted families, e.g. Didiereaceae, which is quite closely related to cacti.
https://succulent-plant.com/families/didiereaceae.html
So of the plants shown in the video, the cactus grafts could of course be successful, and, intriguingly, also the Portulacaria afra. The Crassulaceae would not work.

[Pereskiopsisdotcom]

I remember a member here successfully grafting a Portulaca grandiflora to a Pereskiopsis.

Remember that our concepts of plant classification and taxonomy are humanity's own attempts to make order out of plants. There are likely a handful of plants whether succulent or not that have compatibility to graft to cactus that just need to be discovered. As a general rule of thumb though, a succulent will not graft to a cactus with a few specific exceptions.

[vitt13]

I remember a member here successfully grafting a Portulaca grandiflora to a Pereskiopsis.

I did it for fun. It was short-lived as a scion.

Just for fun
Portulaca grandiflora f. albiflora grafted on Pereskiopsis stem. It had bloom later a few times, but live just few month.

December 13, 2018
Grafted Portulaca grandiflora 'albiflora' had been bloomed

[KonureKing]

"I did it for fun. It was short-lived as a scion."

Short lived or not thats really amazing that, that took in the first place!

[greenknight]

I think what's happening there is the scion is drawing nourishment from the stock, but they don't actually grow together. The wound never heals.