Planting Althea (Rose of Sharon) Near Your House: Spacing Guide

I've always loved the althea bushes my grandmother grew. This weekend I bought two for our front corners. Is this a good location, and how far from the house should I plant them?

Check the Label First

Althea (Hibiscus syriacus) varieties vary widely in mature size—some stay compact at 6 feet, others reach 12+ feet tall and wide. The plant tag should list the expected height and spread for your specific cultivar.

Spacing Rule of Thumb

Add 1.5 to 2 feet to the listed mature spread to determine the minimum distance from your foundation. This allows for air circulation, maintenance access, and prevents moisture buildup against the siding.

Additional Tips

• Althea blooms on new wood, so late winter/early spring pruning controls size without sacrificing flowers.
• They thrive in full sun to part shade and adapt to most well-drained soils.
• Plant at the same depth as in the container; water deeply after planting and mulch.

With proper spacing, your altheas will frame the house beautifully for decades.