care is the same
can you take pictures of the pot labels with plant information ?
reason i ask .. A.arabicum is currently classed as a subspecies of A.obesum by many Taxonomy specialists ...but I believe the 2 are separate species, not because of similarities - but what is *so different between them*
A.obesum - grown from seed obesum generates a fat caudex - have glossy, smooth green leaves - flowers are tubular almost trumpet like ...and almost always a variant of light pink to light violet (and colors in-between)
A.arabicum - grown from seed also generates a fat caudex but with age becomes squat like - leaves are pale Lima bean green, leathery, with hairs on both upper lower surface ....the flowers are almost flat across & less tubular or trumpet like - and in the eyes of many plant collectors produce the most desirable caudexes
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when a Adenium cross or hybrid comes along from either natural or man-made fertilization .... the colors of flowers can become exotic like: reds, yellows, blacks, orange - doubles, singles & any combination ..... seed from these exotic crosses may not become true (look like its exotic parent) - so grafters will take a stem cutting from exotic and graft to a mature A.arabicum caudex ....
So if you get a grafted plant you *never* want to prune below the graft point or plant will revert to original plant
a graft will appear as a perfect ring around a stem ....sometimes a "stepped ring" ...a diagonal line ....sometimes the color of one stem will shift abruptly to another color - will appear like a circular "color" boundary around a stem
other than the never prune below graft - water, fertilize & grow like any other adenium