I heard that you shouldn't grow them near,..

Cukes and potatoes? I see no problem planting them next to each other in the same ground other than the cuke vines trying to take over as they spread out. A trellis for the cukes would take care of that, as long as it doesn't shade the potatoes.

Agree. No problem even if they were in the same bed but as long as they aren't and you can keep the vines from crawling into the potato bed, go for it.

Dave

It is written and virally repeated that potato blight - Phytophthora infestans - is encouraged by having cukes nearby. Like most "companion planting" myths, this is pretty nutso, as that disease can infect a vast majority of vegetable plants (it's "Late Blight" in tomatoes). By that token, don't plant ANYTHING near your potatoes!

Yeah most of the "companion planting" claims are pretty nutso. ;-) I often wonder who got paid and how much for making them up?

Dave