Maris Kestral Kale is a cool season annual that is high in protein and highly digestible. Maris Kale is commonly planted for cattle, sheep, goats and deer. Maris Kale is a late season forage normally planted in the spring and harvested in the fall.  Product Detail Cool season annual High in protein Highly digestible High forage producer Wildlife food plots   Product Information Maris Kestral Kale protein content ranges from 15% to 20%. The leaves are more than 90% digestible. Well-maintained forage plots are highly productive and can produce 8 or more tons of forage per acre. This high production makes Kale and other brassicas suitable for planting on small acreage food plots for deer and other wildlife. Kale grows best in cool climates, and will benefit from a fall frost. Cold days and nights sweeten Kale while hot weather produces bitter tough leaves. Optimal soil temperature for growing Kale is between 60 - 65 degrees. Kale does best when pH of the soil is between 5.5 and 6.5. Kale requires moderate amounts of nitrogen, phosphorus, and potassium.