A three-pot entryway planting plan
Give a narrow doorstep a clear shape with three containers, one repeated color, and room to walk.
Field scope: Part Shade / small pot / drainage required / spring. Match plant labels and local conditions before planting.
Three pots are enough to make an entry feel planted. Start with the light the doorway actually receives, then choose the containers before choosing flowers. The arrangement should leave the door, path and handrail usable.

Measure the walking space
Mark the sweep of the door and the width of the path with tape. Put the tallest container against the wall, not where it catches a bag or a sleeve. A grouping reads as one composition when the pots sit close enough to relate but not so close that leaves are crushed.
Give each pot a job
Use one medium pot for height, a second for the main flowering color and a shallow third for foliage or a trailing edge. A single repeated flower color makes the group calmer than three unrelated mixes. Leave growth room around each young plant; the nursery tag gives the mature spread.
Plant from the back forward
Confirm each pot has an open drainage hole. Add container potting mix, set plants at the same depth they occupied in their nursery pots, fill around the roots and water until excess runs out. Empty saucers after watering so roots are not left standing in water.
Observe before adding more
Check the group after a week. If one pot dries much faster, adjust its position or watering rhythm rather than assuming the whole group needs the same treatment. A quick note about morning light will help with the next planting.
Adjust for the doorway you have
If the entrance faces strong afternoon sun, a part-shade example is only a layout reference; replace the plant choices with varieties labeled for that exposure. A windy step may need wider, heavier pots set back from the edge. Keep the tallest plant below a window or house number it would obscure. The arrangement should still feel useful when no flowers are open.
At the next check
After two weeks, stand at the street and at the door. Is the group balanced from both directions? Has any plant begun to brush the path? Move whole pots before pruning healthy growth merely to preserve the original sketch. Note which position stayed dampest, then use that observation when watering each pot rather than treating the trio as one unit.