At least. Since roses want full or as much sun as you can provide, you want to space them well away from the potential tree canopy spread so that does not shade them out. Rather than looking at just spacing requirements, a better rule of thumb is to consider what the mature canopy sperad of any tree or shrub is likely to be and then space according to that.

Different types of citrus trees will grow to different sizes and also may be available on a dwarfing rootstock so you might have to do some research on your specific tree to find what its mature spread may be. In most cases (but not all), the spread should be close to or slightly less than the expected mature height.

welcome to the forums ... location just about always matter .... and it is helpful to include it in your fact scenario ....

roses need full sun .. and preferably no root competition from trees ... sooo ... the closer you plant to trees... the sooner you will be dealing with the sun and water competition ...

no tree stops growing at some magical size ... in many cases a height ESTIMATE is at ten years .. and in 20 .. you can presume it will be twice as big ... dwarfing roots will not make them stop at some height.. it usually just changed the amount of annual growth.. so they just grow slower ...

you dont mention if these are production fruit trees or more decorative trees ... either way.. fruit production usually dictates some level of pruning.. to encourage and maximize the fruit production ... in many cases.. to increase the sun in the middle of the plant ....

but in doing so ... it can also be pruned to take surrounding plants into consideration ... as to sun ... but you still might have the water competition ...

if you have ever been to a farm ... or an orchard ... you will probably notice.. that the fruit is over there .. the flowers are around the house ... and the veg are over on the other side ... and its because you are grouping plants according to the various cultural requirements of the smaller group ...

e.g. .... just as an example.. not a fast and hard rule ... many roses should not be watered overhead .. and made wet.. due to certain diseases .. like black spot and mildew ... so you wouldnt put them in with the veg.. that you need to drench very often .... again.. this is an example.. not a rule certain ...

you would be much further ahead.. if you gave us some idea of the project.. in regard to these 2 types of plants .... so we could hone in with a bit more specificity ...

ken

Thanks Ken. I feel as if my question is too generic and have decided to edit it to provide a better description. Suppose if the required spacing between grape vines is 8 feet, does that mean that a hybrid tea rose with a recommended spacing of 3 feet would also have to be planted 8 feet away from the grape vine?

This is the project that I'm working on (photo ). There will be a 8 ft pergola for a couple of grapevines with posts just outside the barriers containing the 3 graves. Its 18ft by 13ft from barrier to barrier. The graves face South so sunrise is to the right. Im still trying to figure out what to plant to cover up the bare spaces out side the barriers which I'm allowed to do. There are 3 trees( mulberry, chinar, unknown) and 4 oleanders plants( taller ones) planted last year without any proper planning. I wish to relocate them. Plus we need room for the pergola anyway. Where do you see them doing well visually in 3 or 5 years? And how far spaced? What else would you plant? How can i use my hybrid tea potted roses at home here? Im in the northern hemisphere, hardiness zone 9 with climate that's hot and dry with little rainfall. Thankfully we have a public tap on the ground. Soil is too dense and compacted so I'll be bringing in a truck load of good quality soil to replace it with. Probably down to 3 or 4 feet.