wrote
Can someone give me some pointers on how to take cuttings of new
guinea impatiens?

I need some pointers like how large the cuttings should be (1-5"?),
rooting media to use (perlite, water?), etc...

I've found these root very easily by taking approx 3" side shoots,
nipping out the growing point and standing them in water. After you pot
up the rooted cuttings, continue pinching out at intervals until you get
a bushy plant.

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Sue