Giant Winter Spinach


Giant Winter Spinach

(45 days) Open-pollinated. Selected for its 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. Not as good springback recovery from hard winters as Winter Bloomsdale. Large medium-green semi-savoyed leaves. Betsy Bott of Bog Iron Farm and Forge in Blue Hill, Maine, says Giant Winter fulfills its name in the greenhouse. Cold-hardy through at least part of the Maine winter.

2555 Giant Winter
Item Discounted
A: 1/4oz for $2.50  
B: 1/2oz for $3.60  
C: 1oz for $4.20  
D: 4oz for $8.60  
E: 1lb for $26.00  
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Additional Information


Spinacia oleracea

1,400–2,600 seeds/oz. ¼ oz packet sows 30–50 ft; 1 oz plants 120–200 ft.

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 retard bolting, avoid hot-weather planting, use wider spacing and irrigate or use shade cloth.

Minimum germination temperature 35°, optimal range 45–65°. Spinach seed will not germinate in soil temperatures above 85°.


  • BM: Blue Mold
  • CMV: Cucumber Mosaic Virus
  • DM: Downy Mildew