Species hardy hibiscus
White flower with lime-white center, white stigma, white style and off-white anthers, green bud, green leaves and stems

hardy hibiscus

Hibiscus 'Blue River II'

Hardy Hibiscus (Hibiscus 'Blue River II') is a striking perennial flower that provides a lush summer display of large bright-blue blooms.The saucer-shaped flowers measure up to eight inches in diameter, depending on the climate. Its vigorous leaves offer a dense display of lush color, growing up to three feet in height in a single season. This hardy plant prefers full sun exposure and moist soil. It is an excellent addition to gardens and flower beds as well as aquatic gardens due to it's ability to survive short periods of flooding. Hardy Hibiscus 'Blue River II' is an absolutely gorgeous plant that is sure to attract bees, butterflies and hummingbirds!

Cycle:

Herbaceous Perennial

Watering:

Frequent

Propagation:

Stem Propagation,Root Cutting,Division,Air Layering Propagation,Grafting Propagation

Hardiness Zone:

5 - 9

Flowers:

Clear white with no eye Flowers

Sun:

Full sun

Leaf:

Yes

Leaf Color:

green

Growth Rate:

High

Maintenance:

Low

Care Level:

Medium

watering

Hardy hibiscus (Hibiscus 'Blue River II') should be watered throughout the growing season, from the early Spring months to the late Autumn months. During the hottest and driest months of summer, it should be watered on a regular basis. It is best to water the plant deeply and then allow the soil to dry out in the top inch or 2 before re-watering. If possible, it is best to water in the morning. Additionally, during particularly hot and sunny days, it may be necessary to water twice a day to keep the soil from becoming too dry. Hardy hibiscus also likes plenty of humidity, so make sure to mist the leaves regularly.

sunlight

Hardy hibiscus (Hibiscus 'Blue River II') should have at least 6 hours of direct sunlight each day during the growing season. It is best to provide full sun in the morning and late afternoon shade to avoid leaf burn. In very hot climates, morning sun and afternoon shade should be provided. In very shady or cloudy climates, a full sun location is best. Too much shade may lead to a tall, weak and leggy growth habit. The flowering can also be reduced with less sunlight.

pruning

It is important to prune hardy hibiscus (Hibiscus 'Blue River II') regularly in order to encourage healthy growth and promote blooming. Pruning should be done in early spring, after any danger of frost has passed. The amount of pruning necessary depends on the size and shape of the plant, but generally Hardy Hibiscus should be pruned back to a height of 3 to 5 feet, removing dead wood, crossing branches, and reducing size and density. It is also important to shape the shrub as desired, such as removing lower branches to increase air circulation. Finally, it is recommended to remove any damaged branches or those that are diseased or damaged.

Season

Fall
Winter
Spring
Summer
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Starts Flowering

Hibiscus 'Blue River II' typically starts flowering in late summer, usually in August or September.

Starts Flowering

Hibiscus 'Blue River II' typically starts flowering in late summer, usually in August or September.

Hardiness Map