How do I trim this (forgot the name)

[winzdk]

 

[Raws69]

I have this an replanted the trimmings. As I understand your best trimming say just above the rock level and it will sprout new stems from that point. If you are going to replant then ensure one set of leaves is under the soil and it should root from there.

 

[Andy Pierce]

Alternanthera? Is that the name?

 

[winzdk]

best trimming say just above the rock level and it will sprout new stems from that point.

Thanks I will do that.

Alternanthera? Is that the name?

Ah yes
Alternanthera reineckii 'Rosanervig'
Thank you