Some seed can be collected and stored for long periods of time and still be capable of germinating. Many plants can be produced from seed. Disadvantages Plants propogated from seed are not genetically the same as the parent plant. Therefore they can vary in appearance. For example, the plants can vary in overall size and shape and the leaves and flowers can vary in size, shape and colour from plant to plant.
Many species are difficult to grow from seed.
For example, the seeds of many Boronia species do not germinate quickly, if at all. There are a number of plants which we cannot germinate from seed. This is probably because we do not know the special conditions required to break dormancy or trigger a growth response.