Cityline® Rio Hydrangea Bush

Cityline® Rio is another miniature hydrangea that offers beautiful long-lasting flowers. It blooms early in a color range from a strong blue to purple, depending on the soil pH. If you want to encourage more blue coloring, add aluminum sulfate to your soil. Cityline Rio also offer excellent mildew resistance. It can be grown in containers in milder climates.

Cityline® Rio Hydrangea macrophylla 'Ragra' N/A

Companion Planting: Aster, Astilbe, Dicentra, Viburnum

Planting Instructions:

• - Best planted in early spring or fall to establish strong roots before extreme temperatures
• - Space plants 3-5 feet apart to allow for mature size and airflow

Soil Preparation:

• - Ideal soil pH: 5.5-6.5 for blue blooms; higher pH (6.5-7.0) for pink blooms
• - Prefers well-drained, moist soil enriched with organic matter

Watering Specifics:

• - Water deeply and regularly during the first growing season to establish roots
• - Keep soil consistently moist but not soggy, especially during hot weather

Fertilizer Type:

• - Apply a balanced, slow-release fertilizer in early spring
• - Use fertilizers formulated for acid-loving plants to maintain blue blooms

Pruning and Training:

• - Prune after blooming to shape the plant and remove spent flowers
• - Avoid heavy pruning, as flowers develop on old wood for most varieties

Additional Pest Management:

• - Monitor for pests such as aphids, spider mites, and slugs
• - Ensure good air circulation to prevent powdery mildew and leaf spot

Temperature Tolerance:

• - Hardy in USDA zones 5-9, depending on the variety
• - Protect from harsh winter winds; mulch around the base to insulate roots in colder climates