"Sacha" wrote in message
...
On 2014-07-23 15:03:18 +0000, FrankB said:

"FrankB" wrote in message news:...
I've been growing a Salvia 'Patens' in a 2L pot and it was doing fine
until
the last 2 weeks some worrying dark brown spots and blotches have
started
to
appear on the leaves, young and old. Any ideas?

Are you keeping it pretty dry and watering only when necessary? Let it
drain between watering, too and don't let the leaves get splashed with
water through which sunlight can burn them.

Hi Sacha.

I have 2 photos of the problem.

https://www.flickr.com/photos/120747...ostream/lightb
ox/

https://www.flickr.com/photos/120747...ostream/lightb
ox/

As regards watering I rang up a nursery today where a guy who seemed to know
about Salvias told me that this problem may arise if they are not watered
enough and that I should not let them get dry in the pot. I originally
suspected it was a fungal problem, but he didn't think so and I can see
nothing on the web that suggests that Salvias are affected by fungal
diseases..I've ruled out siun scorch as some of the leaves higher up the
plant have started to show symptoms whereas I always water with the nozzle
of my can close to the soil surface, so upper leaves don't get splashed.