Window Box Ideas
30 window box designs for every home style, sun level, and season. Includes the thriller/filler/spiller formula and year-round planting guide.
See Window Boxes on Your Home →🌸 Classic Cottage & English Window Boxes
Overflowing Cottage Mix
Trailing petunias + upright geraniums + sweet potato vine. Classic full-sun combo that looks unruly in the best way. Deadhead petunias every 2 weeks. $30–$60 in plants.
English Rose & Trailing Verbena
Mini or Drift rose as thriller + verbena trailing over edges. Add dusty miller for silver foliage contrast. Long-blooming, cottage feel. $40–$80.
Lavender & Catmint Herbs
English lavender (upright, fragrant) flanked by trailing catmint. Both are deer-resistant and pollinator magnets. Drought-tolerant once established. Good for sunny south-facing windows.
Snapdragons + Trailing Lobelia
Tall colorful snapdragons as vertical thriller + lobelia cascading over edges in blue or white. Spring combination — cool-weather plants that fade in summer heat.
Cottage Herb Box
Basil, parsley, and trailing thyme in terracotta window box. Fragrant, edible, and beautiful. Add one dwarf edible nasturtium for cascading orange flowers. $15–$35.
Foxglove & Fern Cottage
For shadier windows: dwarf foxglove or astilbe as upright element + trailing ferns. Woodland cottage aesthetic. Replace foxglove with impatiens in summer.
◼️ Modern & Minimalist Window Boxes
Single Species Statement
One variety of plant repeated across all windows — all-white Calibrachoa, or purple trailing verbena. Simple, architectural, hotel-lobby aesthetic. Very easy to maintain.
Ornamental Grass + Trailing Sedge
Dwarf fountain grass as upright + carex or Japanese sedge trailing. Architectural, low-maintenance, interesting texture. Works in part sun to part shade.
Succulents & Sedum Window Box
Echeveria rosettes, sedum 'Angelina' trailing, and one tall aeonium. Water once a week. Perfect for hot south or west exposures. Can winter over in mild climates.
Black-and-White Combo
White begonias or petunias + black sweet potato vine. Dramatic, contemporary, pairs beautifully with modern black window frame hardware. Full sun.
Architectural Evergreen Box
Dwarf boxwood or Japanese holly center + creeping juniper or trailing rosemary. Year-round structure. No seasonal replacement needed. $50–$120 but lasts 5+ years.
Lime Green & Purple Pairing
Chartreuse sweet potato vine ('Margarita') + purple calibrachoa or angelonia. Electric color combination. Very popular in contemporary landscape design. Full sun.
🌿 Shade Window Box Combos
Impatiens Classic
The most reliable shade window box plant. New Guinea impatiens tolerate more sun. Mix 3 colors + trailing vinca vine as spiller. $15–$30 in plants. Replace if summer gets harsh.
Begonia Showcase
Tuberous begonias (dramatic large flowers) + trailing ivy geraniums for spiller. Semi-shade works well. Available in every color. Bloom all summer into fall.
Fern + Coleus + Trailing Ivy
Coleus (upright, colored foliage) + Boston fern (lush greenery) + trailing ivy. All shade-tolerant. Replace coleus annually, fern and ivy may overwinter indoors.
Woodland Moss Box
Sheet moss pressed into window box frame with small ferns, oxalis, and mini hostas. Japanese woodland aesthetic. Needs regular misting. Very unusual and beautiful.
Caladiums + Trailing Bacopa
Bold caladium foliage (giant tropical leaves in red, pink, white) + white bacopa trailing over edges. Tropical shade combination. Caladiums come back from bulbs.
🍂 Seasonal & Year-Round Window Boxes
Spring Tulip + Violas Combo
Plant tulip bulbs in fall directly in window box. Oversow with pansies or violas for early spring color before tulips emerge. Succession planting at its easiest.
Summer Heat Combo (Full Sun)
Vinca + pentas + sweet potato vine. All thrive in 90°F heat. Vinca doesn't need deadheading. Drought-tolerant. Best choice for summer-hot climates. $20–$40.
Fall Harvest Box
Ornamental kale (upright, purple/white), fall pansies (wave petunias in fall colors), and trailing variegated ivy. Add mini decorative pumpkins for October. $25–$50.
Winter Evergreen Box
Cut greens (spruce, boxwood, holly with berries) stuffed into window box + pine cones + red berry branches. No care needed. Replace with spring combo in March.
Year-Round Evergreen Base
Low dwarf evergreen shrubs + seasonal annuals poked in around them. The evergreen base gives winter structure and you just swap in seasonal color twice a year.
Edible Kitchen Window Box
Rotate seasonally: spring = lettuce + herbs, summer = basil + cherry tomatoes (dwarf), fall = kale + chard. Year-round harvest from a 24" box outside your kitchen window.
🏠 Window Box Styles by Home Type
Farmhouse Charm Box
Galvanized metal window box (instead of plastic), planted with red geraniums + trailing white bacopa + green herbs. Simple, classic American farmhouse look.
Victorian Overflowing Cascade
Fuchsia (trailing, dramatic), cascading petunias, and ivy geranium. Layered, lush, cascading 18"+ below the box. Victorian excess done beautifully. Semi-shade.
French Country Window Box
Stone or painted wood box with lavender, trailing rosemary, and white petunias. Blue-purple-white palette. Provence aesthetic. South-facing, full sun.
Colonial Red & White
White window boxes with red geraniums and white alyssum. Classic New England colonial look. Formal symmetry — same combo in every window box.
Spanish/Mediterranean Terra Cotta
Terracotta window boxes with bougainvillea (trailing), marigolds, and trailing rosemary. Warm earth tones. Perfect for Spanish or stucco homes. Full sun required.
Mid-Century Modern Planter Box
Low-profile rectangular planters in black or concrete finish, planted with succulents or ornamental grass. Clean lines that complement MCM architecture. Minimal watering.
The Thriller / Filler / Spiller Formula
The universal window box design rule that works every time.
| Role | Example Plants | Purpose | Placement |
|---|---|---|---|
| Thriller (upright, tall) | Geranium, snapdragon, ornamental grass, coleus, calibrachoa stake | Height and vertical drama | Center or back |
| Filler (mounding, medium) | Petunias, impatiens, begonias, lobularia, salvia | Fill the box, add color mass | Around the thriller |
| Spiller (trailing, cascading) | Sweet potato vine, ivy, bacopa, lobelia, trailing verbena | Cascade over box edge, soften lines | Front and sides |
See Window Boxes on Your Home
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Try It Free →Frequently Asked Questions
What plants are best for window boxes in full sun?
Geraniums, petunias, vinca (periwinkle), portulaca, calibrachoa, and sweet potato vine all thrive in full sun window boxes. For heat extremes (90°F+), use vinca and portulaca — they won't wilt in afternoon sun.
What plants are best for window boxes in shade?
Impatiens, begonias, fuchsia, coleus, and ferns are the best shade window box plants. New Guinea impatiens handle more sun than regular impatiens and are more disease-resistant.
How deep should a window box be?
Minimum 8 inches deep for annuals. 10–12 inches for small perennials or herbs. Deeper is always better — more soil holds more moisture and nutrients. Lightweight potting mix (not garden soil) prevents sagging.
How often should I water window boxes?
Most window boxes in full sun need daily watering in summer. Test soil with your finger — if the top inch is dry, water. Self-watering window boxes (with a reservoir) can extend watering to every 3–5 days.
What is the thriller/filler/spiller formula?
The classic window box design rule: one tall upright plant (thriller), one mounding bushy plant (filler), and one cascading plant that spills over the edge (spiller). This formula creates a full, professional-looking box every time.
How do I mount a window box safely?
Use L-brackets rated for the full weight of a wet soil-filled box (often 25–50 lbs). Anchor into window framing or studs, not just siding. Avoid mounting directly below a window that opens. Most window boxes should be 6–12 inches below the bottom of the sill.
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