Do what the company suggests. :) They know their product best. And if they have your address, they know your zone. 6 sounds about right for most of MA.

I am in Zone 5b and my bare root roses arrived last week. I soaked them in water overnight and planted them on Sunday (yes, that cold, dreary, damp, raw Sunday) and I am confident they will be just fine. I already had three of the same type (Ballerina) and those in my garden have already started extending their leaf buds (as have the Don Juans and Icebergs). I say go ahead and get them in the ground.

Thank you very much to both of you

eric - i feel better now that you have done it already!!!!

I definitely helps to soak them overnight to rehydrate them. I use 5-gallon buckets or a wheelbarrow full of water. Once I had so many I used my bathtub.

Plant asap after soaking. It's ok if the roses have to remain in the water for more than a day. Roses are not frost sensitive and are fine in the ground even if it's still chilly out.

Yes, do soak overnight. Unlike potted roses, bareroot roses are meant to be planted in cold weather....they do MUCH better than if they're planted when we're warming up. They don't have feeder roots usually so the cold weather gives them time to get those growing without the stress of heat.

I also planted a rose last weekend -- on the blustery Saturday. After soaking for a night. I'm in NW CT -- much colder than you. I have planted roses in early April and then had it snow. All turned out beautiful. If the roses are hardy for your zone -- and I hope you picked carefully -- they will be just fine.