Nunhems - Nunhems Home Vegetable seed; Bayer; Crop Science; Nunhems; vegetable seeds; the Global Specialist; vegetable crops; varieties; carrot; cucumber; leek; lettuce; melon; onion; pepper; tomato; watermelon; tomato seed; onion seed The vegetable seed business of Bayer operates under the brand Nunhems. Its portfolio consists of varieties in 25 vegetable crops, including leading varieties of carrot, cucumber, leek, lettuce, melon, onion, pepper, tomato and watermelon.