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Steps
1
Prepare fertile, well-draining soil with a pH between 6 and 7. For garden beds, dig blood meal into the upper 3 inches of soil. If using containers, use 1-gallon pots at least 4 to 6 inches deep, mixing 1 to 2 teaspoons of blood meal into each gallon of potting soil.
2
Time your sowing for early spring (as soon as soil can be worked and is at least 45ยฐF, up to 6 weeks before the last frost) or late summer (6 to 8 weeks before the first autumn frost). Wait until the soil is crumbly rather than sticky before planting.
3
Sow seeds directly into the garden or containers at a depth of 1/4 to 1/2 inch. Space them at a rate of 12 to 15 seeds per foot of row. For a continuous harvest, plant new seeds every 2 weeks until the weather warms.
4
Water the plants to ensure they receive at least 1 inch of water per week. Keep the soil evenly moist but not soggy, as dried-out soil can cause the plants to bolt. Apply 3 to 4 inches of straw or grass clipping mulch to maintain dampness and suppress weeds.
5
Once seedlings sprout (usually in 7 to 10 days) and reach 2 inches in height, thin them so they stand 3 to 6 inches apart, with rows spaced at least 1 foot apart.
6
Maintain the plants by applying a side-dressing of 1 to 2 teaspoons of blood meal once per month while the plant is producing greens and has not yet sent up flower stems.
7
Harvest the spinach, typically within 6 weeks of planting. For a continuing harvest, cut off the outermost leaves when they reach 3 to 6 inches, leaving the inner leaves to grow. Alternatively, use a sharp knife to cut the entire rosette just above ground level. Ensure all harvest is complete before the plant sends up stalks.
Pro Tips
To prevent leaf miners, plant radishes between rows of spinach to attract pests away from the foliage.
Use slug bait around young plants to eliminate slugs that cause large holes in the leaves.
Combine different varieties, such as savoy and smooth leaf, to vary texture and bolt-resistance.
Harvest in the early morning during the coolest part of the day.