hi, ive got these plants in large clumps all over the garden, (didn't plant them) but noticed they have now got black spots over the flower heads, and the leaves look like they're dying, can I cut these really back or do I need to be careful?? thanks for any help 
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Cut them back asap they're going over and clear the area around them. Helebores can suffer with a fungal disease so clearing away and allowing air to get in will help disrupt the cycle. New growth will appear, and the clearer you keep it the better for next year.
aww great, thanks very much, best get out there soon as poss, thanks again