I keep my seeds stock current. There is no guarantee on the seed germination because seed germination doesn't depend on seeds quality only. they require user experience, perfect temperature, proper watering. so i am selling my seeds as is with no guarantee. 
25+ Flowering Kale Nagoya Series Mix Annual Seeds.

FLOWERING KALETo be transplanted outdoors in early spring or in July for fall beds. Start seeds, 5-7 weeks before transplanting date.Cover seeds lightly. After emerge and seedlings are 1-2? tall, replant into a pot of 4.5-8? diameter setting .