Spinach Winterreuzen (Autumn/winter crop) seeds, in the Spinach seeds for sale category of Seeds4Garden, comes in a 250 size that you can plant in August to get it in January.
Spinach seeds for sale
A rounded-seeded variety which can overwinter when sown in late summer and autumn. Produces a crop with fairly large, dark green leaves. Sow in rows in the garden. Sow a number of rows soon after one another to ensure a longer harvesting period. Requires much nitrogen, potassium, and moisture. Does not easily bolt, however do not sow outside the sowing period indicated, otherwise the crop will bolt.
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Spinach Winterreuzen (Autumn/winter crop) Features
Seeds pack size: 250
Flowering Month: January
Planting Month: August