Hi Gogreen! You came to the right place to learn.

If you can dig in the soil now you can go ahead and plant. But you want to be sure the ground is warm enough and isn't too wet. The soil temperature should be at least 50 degrees and when you squeeze a handful of soil it should crumble easily apart when you open your hand. If it stays in a wet clump it's too wet to plant.

Once you get them planted use the manure as a top mulch around the roses but not touching the base of the plant. You should wait until after their first bloom to give them any fertilizer. The one you have will be fine because it is a balanced fertilizer. Read the directions and follow those for how much to give them. After that you can fertilize them about once a month.

Now relax and enjoy your beautiful yellow roses!

You'll get different opinions, but I personally would hold off on any granular fertilizer for several months. Potted roses will usually have some slow-release fertilizer in the potting medium (little green/white balls that look like Osmocote) & many potting soils also have some slow-release stuff in them. It's REAL easy to burn up a plant with granular, especially a young plant trying to get established.

You've got a great location, sounds like you're planting it in good soil (dig a big hole, like twice the size of the pot it's in now), water it in well, & keep watering regularly. Finally, mulch it well. I bet you'll have good results. I hope it performs well for you & is the start of a big love for roses.

Whether you fertilize now or wait, watch, as Seil says, that you do NOT put the manure and fertilizer against the shank (trunk) of the plant. Organic materials, such as manure, if too wet, can encourage problems. Keeping it out under the drip zone, where the water would drip off the plant from rain and where many of the feeder roots will be, is much safer.

Make sure when you fertilize, you don't have the granules touching the shank of the plant. 17-17-17 is a rather high guaranteed analysis, particularly for the nitrogen, and it can burn quickly and badly. Those granules are pretty much pure salts and if a bunch of it lands against the shank of the plant, it can draw out a LOT of water and replace it with concentrated salt, which can burn, dry out and actually kill the plant. Keeping the fertilizer granules evenly spread out on the soil, again around the drip zone and between the plants will prevent the potential burn issue from touching the actual plant. It may seem like a common knowledge issue, but I've seen far too many fried plants from a handful of concentrated fertilizer thrown against the shank or trunk of the plant and left there. Good luck, you're going to have FUN! Kim