Full‑Sun Window Box Flowers for Zone 7b

Top Picks for South‑Facing Boxes

• Marigold
• Vinca (periwinkle)
• Petunia
• Verbena
• Lantana
• Alyssum
• Begonia (wax types handle sun)

Critical Success Factors

• Shallow boxes dry fast: Use 2+ inches of mulch to retain moisture.
• Quality potting mix: Not topsoil. Moisture‑control blends help.
• Drainage: Gravel/pebbles at bottom.
• Don’t overcrowd: Space for mature size.
• Fertilize monthly with bloom‑booster formula.

Any of these annuals will give season‑long color in full sun with basic care.