Full-Sun Window Box Combinations: Heat-Tolerant Annual Mixes

Three-foot boxes in direct sun need tough, trailing, long-blooming combinations.

Tropical/Zone 9+ (Year-Round)

• "Red Riding Hood" Mandevilla + trailing verbena
• Both perennial in frost-free zones

Temperate (Summer Annuals)

• Scaevola (Blue Fan Flower) + Geraniums or Marigolds
• Sweet Potato Vine (lime or dark) for cascading foliage
• Wave Petunias (prune 1-2 stems weekly for fullness)
• Purple Heart Setcreasea (purple foliage accent)

Essential Foundation

• Fresh potting soil annually
• Time-release fertilizer mixed in (Osmocote Indoor/Outdoor)
• Automatic feeding all season

Key: Combine upright, mounding, and trailing forms. Mix foliage colors. All listed tolerate full sun and heat.