hi,

i have a few rose trees in my garden that i bought a few months ago,
all seemed well at first with plenty of flowers, now alot of the leaves
have turned yellow in colour and few have black spots on the leaves.

my question is, am i not watering the plants enough and do i have to
give them more nutrients as i think my soil is not all that great, if
so how often and what type of nutrients do i need to get????

regards

james