Plant pairings for gorgeous window boxes 
A window box looks “designer” when it follows one simple formula:
Thriller (tall) + Filler (mounding) + Spiller (trailing)
Care tips that keep them full:
Window boxes dry out fast—check daily in summer
Match plants to sun: full sun boxes need more water + tougher bloomers
Pinch/trim every couple weeks (especially petunias, bacopa, calibrachoa) to keep blooms coming
Feed lightly every 1–2 weeks with a balanced liquid fertilizer for nonstop color 
