 The garden design , asserts the text , should include rocks and raised mounds of summits , manicured with plants and trees of diverse varieties , artificial ponds and flowing brooks . It describes the arrangement , the soils , the seeds , the distance between different types of plants and trees , the methods of preparing manure , proper fertilizing and maintaining the garden , which plants and trees are best planted first , when to plant others , watering , signs of overwatering and underwatering , weeds , means of protecting the garden and other details . Both public parks and woodland gardens are described by the text , with about forty types of trees recommended for the park in the Vana @-@ krida chapter . 
