You cannot make your Alexandrina Japanese magnolia bloom the darker purple. The different flower colors are due to different genetics, not different culture. You will need to purchase a tree ...

So, even though its ancestors are native to China, this tree is commonly called Japanese magnolia ... One called Alexandrina is popular and common. It produces the classic light, purplish-pink ...

Your tree is deciduous, losing its leaves, so it is a saucer magnolia, often called a Japanese magnolia. The leaves are less succulent than the grandiflora magnolias and the flowers, when they ...