Trees with blue flowers. 10 great shrubs with blue or lavender flowers azaleas rhododendron spp rhododendrons rhododendron spp lavender lavendula spp. 12 best garden plants with blue flowers false indigo baptisia australis a close look at the leaves and flowers. Strongest flower show occurs in june in the south and august in the northwest. Bluepurple flowering trees weve selected the very best blue or purple flowering trees shrubs and climbers here.
Often a blended hue of violet indigo or blue creates a bluish flower. The star magnolia is smaller than the saucer magnolias reaching a height of 15 to 20 feet with a similar spread. Known as the lily of the nile the african lily grows large clusters of blue or white flowers. Its easier to control ph levels in a pot so consider planting your hydrangeas in containers if youre partial to a particular color.
It is also known as jacaranda blue jacaranda black poui or as the fern tree. The colour of the flowers range from relaxing pastel blues to statement bright purples. To keep your petals blue aim for a ph of about 52 to 55. Bright blue flowers start opening in early summer and continue until frost.
Star magnolia tree native to japan is one of the first trees to bloom in spring. Jacaranda mimosifolia is a sub tropical tree native to south central south america that has been widely planted elsewhere because of its attractive and long lasting pale indigo flowers. The blooms hold above their grass like foliage throughout most of the summer. Its white flowers open before its own leaves have appeared at a time when most other trees are just starting to bud.
Grow these trees in the garden where frosts never occur typically in usda hardiness zones 9 and warmer. Borage borago officinalis borago officinalis is an underused plant.