Whats happening to the plants

Could anyone please help n guide me that whats happening to these plants


Thnx!

 

Laurel hedging with slug/snail damage & a rose with black spot

 

How to get rid of them? And the black spots are more than on one plants leaves, what are they? And remedy?

 

There's not a lot you can do about the slugs/snails Elina.

The rose black spot is a disease that carries spores. Remove and destroy or bin the diseased leaves and clear away any from the ground too as the spores can lay there and re-infect. Don't add the leaves to a compost heap as the spores are transferable. Roses usually develop diseases through lack of air circulation so if there are plants (as in your picture) surrounding the rose it won't help the situation. There are ways of controlling black spot but that depends on whether you prefer organic or chemical treatment.