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Binomial Name: Spinacia

Varieties: Bloomsdale Long Standing, Giant Noble, New Zealand

Start: Seeds or seedlings

Germination: 6 - 10 days, 5°C to 24°C

Seed Life (viability): 2 years

Soil: Well drained

Sunlight: Full sun, part shade

Sow Seeds: 3 cm apart

Transplant Seedlings: 10 - 15 cm apart

Ave. Days to Harvest: 50 to 60

Good Companions: Beans, beetroot, cabbage, cauliflower, celery, kohlrabi, potato, radish, rhubarb, strawberry, tomato

Bad Companions: -


Sowing & Planting: This easy-to-grow, nutritious, cool-season crop is among the first greens ready to harvest. But plant it early because it’s quick to turn bitter and go to seed (bolt) as the weather warms and the days lengthen. The dark green color and handsome texture of savoyed varieties are great for edible landscaping.

Sow seed 1cm deep, 3cm apart in rows 30 to 45cm apart (or broadcast seed across a wider area). Thin to 10 - 15cm spacings. Closer spacings can stress plants and cause them to go to seed (bolt) sooner. Early planting is critical as dry soil, heat and lengthening days also encourage bolting. Later plantings benefit from some light shade.

Follow early plantings with warm-season crops such as tomatoes or beans. Make succession plantings every week or two until average last frost date. Sow again in mid- to late summer (under shade) for an autumn harvest. Seeds do not germinate well in warm soil so increase seeding rate to compensate. Or pre-germinate seeds by placing them between sheets of moist paper towel in a plastic bag and refrigerating until they sprout. Spinach seedlings are difficult to transplant.


Growing: Spinach is shallow-rooted and requires consistent moisture to prevent bolting. Water regularly to keep the soil moist. Mulch well after plants are established to maintain moisture and suppress weeds. Use floating row covers to prevent insect damage. Do not overfertilize with nitrogen. Only apply supplemental fertilizer if leaves are pale green. Add lime to make sure pH is at least 6.0. You should suspect that your soil is too acid if germination is poor and leaf tips and margins are yellow or brown.


Harvesting: Spinach is ready for use as soon as it is edible size and it must be harvested before there is extensive yellowing, breakage and other leaf deterioration or the development of seed-stalks. Spinach for market is usually cut below the crown with a knife, taking care to keep the plants clean and to prevent undue breakage or bruising of the leaves. Spinach should be sorted to remove all yellow or damaged leaves before packing into baskets. If spinach is slightly wilted when packed, it will be less subject to breakage. 


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