[digger1957]

Evening all.

Our rhubarb is growing well but the stems have marks on them like little bruises and some have blisters. Any ideas?

Thanks,

Digger.

[Trillium]

Almost nothing bothers rhubarb, but obviously something likes yours. I'd pick a stalk or 2 with the worst of these problems and carefully slice into them. Look for possible borers (maggot-like things) tunneling inside, or other pests digging little 'nests'. Often soapy water will wash them off except for borers which tunnel inside the plant. I can't think of any diseases that bother rhubarb but if you can post a pic, it'll be a great help.
Could be you've over-fertilized the plant and made it susceptible to pests?