The drip line of your roof is an important factor in locating foundation plants even in regions which do not get much or any snow and ice. Falling rain should reach the plants, so, except in unusual cases, they should be placed at least a foot beyond the drip line. At first they may look as though they were sitting out there by themselves, but in time, as the branches spread and the plants get larger, they will gradually reach back to the house and occupy all the space provided for them.
Plants under Eaves
When under unusual circumstances, you have to place plants under the broad eaves of a mod em type house, it is perfectly all right to do so if you make sure of a constant and sufficient supply of water for them. Do not wait until the soil is bone dry before applying water; set up a regular schedule of watering (adjusted to the weather, of course) so that the plants will never be in danger of injury from drought.
If you do not choose to maintain a ground cover under the plants, the next best thing is a layer of mulch which will keep the soil cooler in hot months and keep a supply of moisture in the ground over a longer period. This practice is absolutely essential to success in regions where several months of hot, dry weather are the rule.
The temptation to grow flowers in the midst of the foundation planting is widespread. My own view is that theoretically and ideally there should be no flowers in the public area, including the foundation planting. However, the desire for flowers is so strong that it is next to impossible to convince the average home owner that he should not have some annuals or perennials in his front yard.
If you feel that you must do that, one permissible way to do it.