Aphid Infestation

I had an abundance of Giant Red Mustard so I put a pot out and left it to natures elements other than me watering it. The mustard grew pretty fast and was looking great until a few days ago. I noticed a few aphids on the bottom of the leaves so I decided to leave them to see how fast they will breed.
To my suprise and they multiplied so fast I was impressed to be honest. The leaves on the plants deteriated really fast and started to look limp and off colour, also holes appeared.
I made some soap mix and sprayed the aphids.
Below is some photos and I will post more in a couple of days so you can see the results.

This pic was a couple of weeks ago...