Type
curly, hybrid
Kale variety
Winterbor Kale
A very popular curly kale with tight blue-green leaves and strong cold tolerance. Plants are vigorous, attractive, and productive over a long season.
Days to maturity
55-65
Best for
full-size bunches, cold-season harvests
About Winterbor
Winterbor is a hybrid curly kale with tall, vigorous plants and blue-green, heavily ruffled leaves. It is valued for strong yields, attractive bunches, and very good cold hardiness.
Growing Winterbor Kale
This is an excellent fall and winter kale, and cold weather improves the eating quality noticeably. Space plants well so the large rosettes can fill out, and harvest from the bottom up while leaves are young enough to stay tender.
Full growing guide
For planting dates, care, and harvest that apply to all kale, see the complete guide.
How to grow KaleOther kale varieties
Variety characteristics are general guidance for US home gardens; performance varies by climate, soil, and season. Seed and plant availability differs by supplier. Page updated Aug 4, 2026.