Use spinach when you want tender leaves that wilt in minutes; choose kale for a sturdier green that holds up in soups, braises and roasted dishes. Both are available year-round, but cool weather improves local quality: spinach peaks in spring and fall, while kale often tastes sweeter after autumn or winter frost.
| What to compare | Kale | Spinach |
|---|---|---|
| Leaf texture | Thicker, firmer leaves; remove tough stems for a more even bite. | Tender leaves that soften quickly when heated. |
| Best quick use | Chop for a salad, soup or sauté that benefits from a sturdy leaf. | Add to a salad, pasta or pan at the end and let it wilt. |
| Cool-weather season | Peak sweetness and tenderness often follow autumn and winter frosts. | Field-grown spinach peaks in spring and autumn; packaged baby spinach is sold year-round. |
| Freshness check | Look for firm, richly colored leaves without yellowing. | Avoid limp or yellowing leaves; rinse just before use. |
Can you substitute kale for spinach?
Often, but adjust the cut and cooking time. Thinly slice kale and start cooking it earlier so the leaves have time to soften. Add spinach near the end of cooking; a handful wilts quickly into pasta, soup or a skillet dish. In a raw salad, spinach is tender straight from the bag, while kale needs to be sliced thinly for a similar bite.
Which green is in season?
Both greens like cool growing weather. In Season's produce calendar puts spinach's field-grown peak in spring and autumn, and notes that kale often becomes sweeter after cold weather. Grocery stores stock both outside those windows, so local origin and freshness are better clues than shelf presence alone.
For more detail, see Utah State University Extension's spinach selection and storage guide and its notes on harvesting kale through light frost. Find other fall picks in the Fall 2026 produce index.
Nutrition per 100 g
| Nutrient | Curly green kale | Baby spinach |
|---|---|---|
| Calories | 35 kcal | 23 kcal |
| Total fat | 0.7 g | 0.4 g |
| Fiber | 2.1 g | 2.2 g |
| Total sugars | 0.9 g | 0.4 g |
Figures are reference values from In Season's shared produce data. Nutrition can vary by variety and growing conditions.
Shared catalog last synced 23 September 2026.