Alert: Limited Online Availability

Now that fall is here, we have limited our stock for online purchase. Find Monrovia plants at your local garden center. Pre-order for 2023 will be available later this year. ×

Collie Mullens Rose of Sharon

Hibiscus syriacus 'Collie Mullens'

A charming flowering shrub with slender, upright branches and thick, bright green foliage. Outstanding large rose-pink, semi-double flowers provide welcome color accents in summer. Works well as a hedge or screen. Highly tolerant of air pollution. Deciduous.
There are very few rules in gardening, but perhaps the most important one is to work within your zone. Choosing plants that grow and thrive in your particular climate is the very first step toward having a beautiful garden . Learn More

Your climate might be too cold for this plant:


Full sun, Partial sun

Water when top 2 inches of soil is dry.


Due to the seasonal nature of plants, availability at your local garden center is not guaranteed. Give them a call before visiting.

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Botanical Pronunciationhi-BIS-kus si-ri-A-kus
Average Size at MaturityModerate growing; reaches 10 ft. tall, 6 ft. wide.
Bloom TimeSummer
Deciduous/ EvergreenDeciduous
Flower AttributeShowy Flowers
Flower ColorPink
Foliage ColorGreen
Garden StyleContemporary, Cottage, Rustic
Growth HabitUpright
Growth RateModerate
Landscape UseBorder, Privacy Screen
Light NeedsFull sun, Partial sun
Special FeatureEasy Care, Waterwise
Water NeedsModerate
Watering NeedsWater when top 2 inches of soil is dry.
Companion PlantsPrincess Flower (Tibouchina); Lantana (Lantana); Purple Fountain Grass (Pennisetum); Mandevilla (Mandevilla); Plumbago (Plumbago)

Adaptable to most well-drained soils; tolerates brief periods of drought. Water deeply, regularly during first growing season to establish an extensive root system. Once established reduce frequency; tolerates brief periods of drought. Apply fertilizer in early spring. Prune after flowering to shape and promote vigorous new growth.

This Plant's Growing Zones: 5-9

USDA Cold Hardiness Zone Map

Your USDA Cold Hardiness Zone:

Your climate may be too cold for this plant