How to Grow Spinach

Growing guide

Overview

Spinach is a fast, cold-hardy leafy green that gives you harvestable leaves in about 40 to 50 days. Gardeners love it because it grows in cool weather, tolerates light frost, and works in beds or containers. It needs partial sun, steady moisture, and loose, well-drained soil to thrive.

Soil & planting prep

Plant in loamy, well-drained soil rich in organic matter; spinach prefers a pH around 6.5 to 7.0. Work in 2 to 4 inches of compost before planting. Space plants 3 to 4 inches apart in rows 12 inches apart, and sow seeds 1/2 inch deep.

When to plant

Sow spinach directly in the garden 4 to 6 weeks before your last spring frost date, as soon as the soil can be worked. For a fall crop, sow again 6 to 8 weeks before your first fall frost date. In hot-summer areas, start in late summer for a fall harvest and use shade cloth to keep plants cool.

How to plant

1. Choose a spot with partial sun and well-drained soil, or fill a 3-gallon container with potting mix.
2. Work 2 to 4 inches of compost into the top 6 inches of soil and rake it smooth.
3. Sow seeds 1/2 inch deep, spacing them 3 to 4 inches apart in rows 12 inches apart.
4. Water gently to settle the soil and keep it evenly moist until seedlings emerge, usually in 5 to 10 days.
5. Thin seedlings to 3 to 4 inches apart when they have two true leaves, and snip the extras instead of pulling to avoid disturbing roots.

5 common mistakes to avoid

• Planting too late in spring: spinach bolts and turns bitter as soon as days get long and hot, so sow as soon as the soil can be worked, 4 to 6 weeks before your last frost date.
• Letting the soil dry out: spinach has shallow roots and drought stress makes leaves tough and bolt-prone, so water consistently to keep the top inch of soil moist.
• Sowing too thickly and never thinning: crowded plants stay small and compete for water, so thin to 3 to 4 inches apart once seedlings have two true leaves.
• Growing in full summer sun: heat above 80°F triggers bolting and stops leaf production, so use partial shade or shade cloth during warm spells.
• Harvesting the whole plant at once instead of outer leaves: cutting everything ends the season early, so pick outer leaves first and leave the center crown to keep growing.

Harvesting & storage

Start picking when leaves are 3 to 4 inches long, usually 40 to 50 days from sowing. Cut or pinch outer leaves at the base, leaving the center rosette to produce more, or cut the whole plant 1 inch above the soil for a one-time harvest. Rinse, dry, and store in a perforated bag in the refrigerator for up to a week.

Companion planting

Spinach grows well with strawberries, beans, peas, and radishes. Avoid planting it near fennel, which can stunt nearby crops.

Growing in containers

Spinach is a good container crop; use a 3-gallon pot with drainage holes and a quality potting mix. Keep it in partial sun and water when the top inch of soil feels dry.

Pro tips

Sow directly in early spring or fall. Harvest outer leaves to extend the season. Bolts quickly in summer heat — shade cloth helps. Perfect for containers and indoor growing.