Seeds of some plants don't germinate. How are their next generation formed?
Seeds are not the only way of reproduction in plants. Several other methods such as vegetative reproduction can help in continuity of life in such plants by forming next generation. Some examples of vegetative reproduction are :
Stem cutting in rose
Grafting in mango
Leaf budding in Bryophyllum
Runners in grass
Offsets in Eichornia.