Brown leaves on clematis, dogwood, violas?

Hi everyone!

I hope there is something really simple I am missing...

I am getting brown mottled leaves on a clematis growing in a container up a trellis. It has just started flowering and seems Ok otherwise.

Some violas in a container in another area have all now pretty much finished flowering but the foliage is a similar brown mottled rusty colour.

Then this afternoon I noticed a similar appearance on a cornus alba growing in the garden.

No pics yet but I will get some.

Any ideas what is going on? Any help much appreciated!

 

In most cases brown drying clematis leaves mean the plant hasn't received enough moisture at its roots.
When watering these use the hosepipe and not the watering can because of the amount of water needed - leave it on a slow trickle for 10 minutes a week.

Growing these vines/plants in a container mean a large container because the roots of the plant are about 12" deep, so, the container needs to be about 2' diameter and the same depth.

Cornus also suffer those brwon leaves - again when the plant's got too dry.

I have dozens of clematis here (aswell as 2 Cornus) and i see the brown leaves from time to time, you just need to be soaking those clematis very frequently because they are very thirsty plants and take-up a lot of water.

 

Ahh - the penny drops. I wonder if that could be the problem. I'll get on with the watering and see if it makes a difference - thanks