you could use a lighter to burn the ends so the rope doesnt fray.

The rope wick will pull all the water the plant needs for survival from the reservoir underneath the planter.

Then you just set the plant inside the reservoir and ensure its topped up with water.

How to make a self watering concrete planter

I am so happy I found this self-watering planter idea by Evan and Kailyn, they have awesome videos!

Drill holes in the bottom of a planter and use a wick to make a hydroponic self watering planter

How to make a concrete self watering planter with a rope wick