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Giant Winter Spinach Seed-Spinach Seed-Heirloom Seed Supply

Giant Winter Spinach Seed

Regular price $2.89 $2.00 Sale

Giant Winter Spinach is open pollinated and this strain is bred for it's cold hardiness. Recommended for late fall greenhouse crops, or overwintering under mulch. The most productive for late fall/early winter production in high tunnels with up to six times the leaf matter of competing varieties. Large medium-green semi-savoy leaves. Perfect for salad mix when baby size & perfect for bunching when full grown. Not particularly great for summer production, but this variety has proven to be a winter staple for us.

Garden size about 250+ seeds per pack.

Farm size about 1000+ seeds per pack 

89% germination.

 Spinacia oleracea

Spinach Culture: Very hardy. Must be planted as soon as the ground can be worked in the spring to avoid early bolting. For fall crop try late July-Aug. sowing; to overwinter, sow late Aug.Sept. Heavy nitrogen requirements, but avoid applying high-nitrogen fertilizers shortly before harvest to prevent high nitrate levels in the leaves. Pick large leaves often for heavier production.

Smooth-leaved spinach is easier to wash than the semi-savoyed type and is increasingly preferred. Heat, crowding and long day-length (over 14 hours) trigger premature bolting. To reduce bolting, avoid hot-weather planting, use wider spacing and irrigate or use shade cloth. Plant spinach in a location shielded from western/setting sun.

Optimal soil temps for best, fastest germination 55-60°. Emergence takes 12 days at 50°. Spinach seed will not germinate in soil temperatures above 85°.