Kale: The Green That Gets Sweeter in Cold
Kale is a cold-hardy leafy green that matures in 55–65 days. Frost makes it sweeter. It’s the most forgiving green for beginners.
Unlike spinach, kale doesn’t bolt in heat. It’s productive year-round in mild climates.
Quick Facts
| Attribute | Value |
|---|---|
| Days to sprout | 5-10 |
| Days to harvest | 55-65 |
| Sun | 4-6 hours |
| Spacing | 12-18 inches |
| Cold tolerance | Down to 10°F |
| Flavor | Mild, earthy, sweet after frost |
Why Grow It
- Cold-hardy. Survives frost. Gets sweeter.
- Cut-and-come-again. Harvest outer leaves for months.
- Doesn’t bolt. Unlike spinach and lettuce.
- Nutrient-dense. High in vitamins A, C, K.
How It Fails
Failure 1: Bitter leaves. Heat stress. Harvest in cool weather. Failure 2: Yellow leaves. Nitrogen deficiency or overwatering. Failure 3: Cabbage worms. Green caterpillars. Use row covers.
Comparison
| Variety | Leaf | Cold Tolerance | Flavor |
|---|---|---|---|
| Curly | Ruffled | High | Mild |
| Lacinato | Flat, dark | High | Sweet |
| Red Russian | Flat, purple | High | Mild |
| Redbor | Ruffled, purple | High | Mild |
Common Questions
Why is my kale bitter? Heat. Harvest in cool weather or after frost.
Can I grow kale in summer? Yes, but it’s bitter. Best in spring and fall.
How do I harvest? Cut outer leaves, leave the center.
Can I eat it raw? Yes. Massage with oil to soften.
Does it come back next year? Usually biennial. Bolts in second spring.
Can I grow it in containers? Yes. 12-inch pot, one plant.