How would you create a sustainable balcony garden on a high and often windy balcony?

I know, it's specific, that's because I'd like it for myself, but my plants are being overrun with aphids while their enemies like ladybugs, hover flies, and lacewings, don't seem to find their way to the balcony.
I'd like to have a nice green balcony with permanent plants that survive, but that's been a challenge so far.

I was thinking of building some sort of long low narrow planter along the front to keep the plants connected, but it's not very practical and I'm not sure of the benefits.

This is in the Netherlands by the way.