Garden Scheme

Plant library  ·  Vegetables

Swiss Chard

Beta vulgaris subsp. vulgaris

Swiss chard is a leafy annual that brings a tidy, colorful presence to food beds while supplying leaves from late spring into fall. Beta vulgaris subsp. vulgaris reaches about 18 inches tall and 1 foot wide, forming an upright clump rather than a sprawling crop. Its colorful stems can make it useful at the front or middle of an edible border, provided lower plants will not be shaded as the leaves fill out.

Sunlight Full Sun
Water Regular
USDA zones 3–11
Spacing 0.75 ft
Mature size 1.5 ft tall, 1 ft wide
Harvest Late spring - fall

Placement and use

Place Swiss chard in a sunny bed where the outer leaves can be picked without stepping into the planting area. A row along a path, the edge of a raised bed, or a block within a mixed vegetable planting keeps harvest access straightforward. Allow its 18-inch height to sit behind very low crops, but avoid placing it immediately beside taller plants that will crowd its light. Beans, onions, lettuce, and cabbage can be grouped within the same planned bed.

Spacing and mature footprint

Space plants 9 inches apart, center to center, then reserve roughly 1 foot of width for each mature clump. In a narrow bed, use one or two accessible rows rather than filling the full width; leaves are harvested repeatedly from the outside, so a path-side edge is especially practical. Keep the planting line clear of dense edging plants, irrigation hardware, and other obstacles that would make reaching the crown awkward.

Three plants set 0.75 ft apart, center to center; shaded circles show the 1 ft mature spread.

Sun, water, and soil

Give Swiss chard full sun and regular water, especially where beds dry quickly around paving or raised-bed edges. Use soil that holds moisture without becoming neglected or compacted, and incorporate finished compost when preparing the bed. A soil pH around 6 or higher is suitable, making chard a workable choice for many established vegetable plots after a soil test guides amendments.[1][2]

Seasonal notes

Plan for the bed to remain occupied through the main growing season: leaves begin around 55 days from planting, and the harvest window runs from late spring into fall. Pick outer leaves while leaving the center intact to keep new foliage coming. Chard can continue producing leaves after the first harvest, so leave enough open space around each plant for repeated visits rather than treating it as a one-time cut crop.[1]

Growing facts

Botanical name
Beta vulgaris subsp. vulgaris
Type
Vegetable
Category
Vegetables
Lifecycle
annual
USDA hardiness zones
3–11
Sunlight
Full Sun
Water
Regular
Plant spacing
0.75 ft
Mature size
1.5 ft tall, 1 ft wide
Days to maturity
55
Harvest season
Late spring - fall
Pollinator friendly
No
Deer resistant
No
Native to North America
No

References

  1. Growing spinach and Swiss chard in home gardens — UMN Extension
  2. How to grow chard — RHS

Editorial content updated 2026-07-20.