I planted my bareroot Reliance back in May. It only recently started putting on growth (first of June) and has taken off with these warm temps. I water mine about every other day. Maybe some sort of transplant shock? Maybe they could have been pruned back some?

What type of soil do you have? If it drains resonably well, then it is probably not too much watering. Where did you get the vines? If they were indoors or in a greenhouse or under shade cloth, then they are probably sun-burned. They should be hardened off before planting in full sun. The lower, older, leaves probably were never exposed to intense sunlight, and are more sensitive than the newer growth. As long as your soil is not heavy clay, I would recommend you keep watering them every 2 or 3 days, apply some mulch, and give them time to see how the new growth looks.

The soil is a fair amount clay... I think I am going to apply mulch and only water every 3 days here on out. I bought these vines outdoors so I do not believe it would be sunburn... Will growth come back at all this year? Should it come back ok next spring? Anything else I should treat them with? They're still thinning a bit and look like they could go either way right now.

Thanks.

Anyone have any advice on grape vine care in my region (Zone 4, Minnesota)? I'm watering every couple days to keep the soil moist... How much water should these vines get?

clones, even if the vines were outside they could have been very close to each other or shaded by some other plants next to them or whatever. Your symptoms sound just like the shock of too much sun too sudden. It is one reason why people caution against transplanting in hot sunny weather. My guess is the plants will recover and do OK. I don't think the amount of water has anything to do with it; just keep the soil mildly moist at about 1" depth. The top 1" can be pretty dried out.

Scott