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Plant library  ·  Herbs

Sweet Basil

Ocimum basilicum

Sweet basil is a warm-season annual herb grown for repeated leaf harvest from summer into early fall. Reaching about 2 feet tall and 18 inches wide, it makes a leafy, medium-height presence in vegetable beds, herb plots, and roomy containers. Place it where frequent picking is easy: regular tip pinching keeps the plant compact, branching, and productive.

Sunlight Full Sun
Water Regular
Planning spacing 1 ft
Typical mature size 2 ft tall, 1.5 ft wide
Typical harvest Summer - early fall

Sweet Basil spacing and mature footprint

Space Sweet Basil 12 inches apart, measured center to center (30 cm).

The mature spread is about 18 inches (45 cm), so plants set at that distance grow together into a closed canopy over the bed.

Treat 12 inches as a planning baseline — cultivar and local growing conditions shift the final footprint.

Compare with the full herb spacing chart

Three plants set 1 ft apart, center to center; shaded circles show the 1.5 ft mature spread.

Placement and use

Give Sweet Basil a sunny position near the front or middle of a food garden, rather than behind taller crops that could limit its light. Set plants close to a path, patio, or kitchen door so stems can be picked without stepping into the bed. Keep it in a separate section from sage and rosemary when organizing a mixed herb bed.

Spacing and mature footprint

Plant basil 12 inches apart, center to center, for a continuous harvestable row or block. Each plant can broaden to roughly 18 inches, so allow the foliage to meet lightly rather than packing plants tightly beneath larger neighbors. In a bed, leave a reachable edge or stepping access beside the planting; this makes it easier to pinch tips, pick leaves, and remove flower buds throughout the season.

Sun, water, and soil

Use a full-sun site with at least 6 hours of direct summer light and soil that stays evenly moist but drains freely. Regular watering is most manageable in a bed with a nearby hose path or in a container that can be checked often. Avoid crowding the planting: open space around foliage improves air movement when warm, humid weather arrives.[1][2]

Seasonal notes

Plan basil as a single-season occupant, planting after cold conditions have passed and using the space for another crop when it finishes. Leaf harvest begins about 60 days after planting and continues from summer into early fall. Pinch growing tips and emerging flower buds if the goal is a longer leafy harvest; leave selected plants to flower when their pollinator-friendly bloom is wanted instead.

Growing facts

Botanical name
Ocimum basilicum
Type
Herb
Category
Herbs
Lifecycle
annual
Sunlight
Full Sun
Water
Regular
Planning spacing
1 ft
Typical mature size
2 ft tall, 1.5 ft wide
Typical days to maturity
About 60
Typical harvest season
Summer - early fall
Plan a garden with sweet basil

References

  1. Growing Basil in a Home Garden — University of Maryland Extension
  2. Ocimum basilicum — North Carolina Extension Gardener Plant Toolbox