Kale is an extremely cold-hardy green that actually tastes better after frost.
Zone 6B has a moderate growing season. Most crops do well here with proper timing around frost dates.
Good companions: beets, celery, herbs, onions, potatoes
Avoid planting near: strawberries, tomatoes
50-65 days from seed (baby leaves at 25 days)
USDA Hardiness Zone 6B has an average last spring frost around Apr 10 and first fall frost around Oct 20. All planting dates above are calculated from these frost dates. Your specific location may vary — check with your local extension office for the most accurate dates.