Should I be concerned long term?

[rosstheboss1972]

Hi everyone, this is a picture of my concrete block constructed, Parex rendered wall planters. Inside the planters there is rubble at the bottom and at the top soil in a weedproof membrane. There is nothing covering the inside of the planters that I can see (other than Parex render tops see pic)...it's not the drying out process, it's rain water soaking through the soil or rubble out through the blocks and render. What should I do? What are the long term issue? By the way the water staining disappears after the suns been on it. Thanks

 

[jj4091]

No expert, but would not have thought it would be a problem, most renders soak up water to a certain extent then dry out later

 

[conny]

If thats moisture leeching through the wall to the outside it may be prudent to fit an inner liner, otherwise the plants/flowers are going to need a lot of water because the planter will seem to be absorbing most of it.