I have 3 hybrid tea's and a grandiflora in pots that i wish to transplant to the ground this spring but im unsure about the right spacing distance between each them. I've been reading about it on the internet and opinions vary from 2ft, 2 and a half to 3ft. I dont want to plant my roses too close to invite issues relating to disease nor too far to have large gaps in between. I'll be planting them in the South-eastern side where they'll get plenty of sunlight. We have a semi arid climate with summers that are hot and dry. What would be the ideal spacing under such conditions?
Roses vary quite a bit in height and spread and growth habit - some are vigorous and get quite tall and wide, others are small in comparison. The spacing is dictated by the eventual spread or width of the rose concerned - if one of them gets, say, 3 feet in spread, and another makes five feet, then you will need to plant the first and the second will need to be five feet away. Hopefully you know the varietal names of the roses you have... if you don't, you'll need to play safe and space them about 5 feet apart to allow for good airflow around them. Not sure what you mean by 'grandiflora' rose - floribunda perhaps?