Herbs are easy to grow in window boxes, patio containers and the garden, and make a big impact in cooking. Many herbs are perennial and come back year to year. Others need constant warmth and can be brought in as fragrant, edible houseplants before the first frost. Stock up on kitchen staples like basil, oregano and thyme. Plenty of hard-to-find herbs like feverfew, bay laurel and tarragon.