Most people will have some kind of budget in mind for the project. If you have 150 linear feet to cover as opposed to 20 linear feet then maybe you chose a less expensive plant. Or if you have your heart set on a particular plant then what the heck, go all out, splurge a little.
This is another important question, because there is nothing worse than spending time and money on a project for it only to be a disaster. No one wants a plant that is advertised to “grow only 15-20 ft high max” but then come to find out that it took over your yard and is now 45 ft high.
And last, what type of maintenance are you willing to do? None? Once a month trimming?
Now this one is a big deal, probably more important than the budget question. Because if you decide on an fast growing plant that tends to grow up to 35 ft naturally but you only want to keep it trimmed at 10 ft once a every 6 weeks, well it could become a problem for you and/or your neighbors if you wanted ‘low maintenance’.
The overall idea is to pick the right plant for the right place. A good rule of thumb is to “go native” as much as you can. Stay away from invasive and exotic’s that reap havoc to your native ecosystem. Here are some plants that I find are great for hedges, pro’s and con’s, as well as an FYI list of invasive’s.