Ten ideas for turning a balcony, patio, or windowsill into a productive garden. All tested in actual small-space conditions.

1. Vertical grow bag towers. Stackable fabric bags hold herbs or strawberries in a 3×3 footprint.
2. Self-watering buckets. Two-bucket sub-irrigated design handles tomatoes for a busy person.
3. Railing planters. Over-rail hooks double usable balcony floor space.
4. Windowsill herb garden. Five small pots, five herbs, a sunny window. The single highest-value small-space project.
5. Salad in a shallow planter. Lettuces and greens need 4 inches of depth; a long shallow planter produces weeks of salads.
6. Wall-mounted pallet garden. One pallet lined with fabric becomes a vertical herb garden.
7. Hanging strawberry basket. One basket, a dozen berries across the season.
8. Cherry tomato in a 5-gallon container. A single container produces 3-5 lbs of tomatoes over summer.
9. Scallions from cuttings. Re-root the white ends of store-bought scallions in water. Free perpetual supply.
10. Microgreens on a counter. Shallow tray, any seeds, 10 days to harvest. Year-round in any climate.

Combine five of these and a 20-square-foot balcony feeds a small household's herbs, salads, and one fruiting plant. Gardens don't require acres — they require intention.