Made of plant fiber, such as corn, wheat and hull that can be biodegrade naturally after period of time without any pollution to environment. The flower pots, trays can be artificially controlled the degradation time. we can probably control the degradation time of the product, for example, about after 1 month later start degradation, or after one year according to customer's needs. for example, commonly used horticultural nursery pots, there is only enough for three or four months, so that we can have nursery pots go natural decomposition in three or four months, For the time being, the ordinary flower pots we can do roughly from 1 Month to 5 years any period of the degradation time.