Now is a great time to plant them, but remember that they have been in those containers all season and will be seriously root bound which is probably why your roses are so frail looking. You will need to untangle all roots and prune off the ones that have turned brown or black. The roots should be creamy white to white.
Roses need at least 6 hours of direct sun to do well.
Here are some instructions on planting and pruning roses.
Transplanting a rose
1) wait until evening when temps are cooler.
2) cut the rose back to about 2 or 3 feet.
3) prepare the new home by digging a hole 2ftx2ft and water the hole. Fill the hole with water and let it drain at least twice.
4) save the top 2/3 of soil that you just dug up and set aside. Discard the bottom 1/3.
5) amend the soil you saved with peat, bone meal, and garden compost.
6) in the bottom of the hole add a layer of manure 2-3 inches thick and then layers some of the amended soil on top of the manure. Do NOT set the roots directly on the manure.
(Skip 7 & 8 since you are transplanting from a container)
7) use a shovel to cut around the rose bush about 18inches from the trunk all the way around.
8) Moving around the rose bush again, reinsert the shovel and pull down on the handle. Doing this all the way around will loosen the soil and begin to separate any long roots. Keep doing this until the rose can be easily removed (Don't worry too much if you break a root because roses are tougher than they look)
9) Remove the rose. Shake the soil away and trim any damaged or dying roots.
10)build a mound in the bottom of the hole and set the rose in hole making sure you spread the roots around the outside of the mound.
11) fill in the hole half way with the ammended soil and water. Once the water has run through then finish filling in the hole with the soil and water throughly.
Now that you have transplanted your rose then make sure you give it water everyday for the next 2 weeks. Be sure you water it at the base and early in the morning because roses don't like to get wet. After the two weeks then you can cut back the watering to once a week.
Pruning:
There are two types of pruning and both are necessary to beautiful roses. Here are detailed instructions for pruning:
General Pruning: You do this to remove any dead or dying canes or spent flowers.
You need to pick a set of five leaves, but not necessarily the first set. Pick a set of five that are pointing outward because that will be the direction of a new cane and flowers. If you choose one pointing inward then your canes can cross and will cause other problems. Cut the cane at an angle like this (/) about 1/4" above the five leaf set. It is okay to do this with each cane and especially if the cane is dying. It is also okay to do this throughout the growing season because it promotes new growth.
Autumn Pruning: Any time between the first freeze of Autumn and the last freeze of winter you can seriously prune your rose down to about 2 feet. This will create a fuller, lusher plant for the new season. Once again you will want to cut at an angle. However, instead of cutting above a five leaf set, this time you will want to cut right above a node which will resemble a small, reddish, slightly pointed bump on the cane. Like the five leaf set, make sure the node is pointing outward.
Here are a couple of web sites that have more detailed directions on pruning roses.
http://www.bayeradvanced.com/article/how-to-prune-hybrid-tea-roses.html?source=google
Video from Expert Village on how to prune a rose:
http://homegarden.expertvillage.com/videos/deadheading-roses.htm
Good Luck
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