Q.Green Aphids on Stem of Flowers
I have several pots of Streptocarpus (cape primrose) in bloom in the house and the stems are covered in tiny green aphids. Is there a homemade recipe for insecticidal soap before they spread to my other plants?

Certified GKH Gardening Expert
These articles will help you:
https://www.gardeningknowhow.com/plant-problems/pests/homemade-aphid-control-a-natural-way-to-kill-aphids.htm
https://www.gardeningknowhow.com/special/organic/natural-home-pesticides-organic-garden-pest-control.htm