Hydrangea Cityline® Rio Description
Cityline® Rio bigleaf hydrangea (Hydrangea macrophylla) is one of the best choices on the market for a deep, true, blue bloom. It is the largest of the Cityline series from Proven Winners and wears a handsome cloak of deep green glossy foliage all season long. Where conditions are right (see below for more information), the big mophead blooms sparkle in deep cobalt blue.
Many people think bigleaf hydrangeas like this are fussy, but that’s not true – they actually do better with less maintenance (i.e., no pruning) and their basic needs for water and light met. Follow our instructions below and learn to be successful with any bigleaf hydrangea!
Special features: Long blooming, Cut flower, No prune, Space-saving
Recommended For You:
- Botanical name: Hydrangea macrophylla 'Ragra'
- Common name:
Bigleaf hydrangea, Mophead hydrangea, Florist's hydrangea, Hortensia
- Sun exposure:
Sun in cool areas; part shade in warm climates.
- Ship form:
- Soil type:
Any well-drained but moist soil.
- Soil moisture:
- Height x width:
2-3' tall and wide
- Flower color:
Deep blue or pink, depending on conditions (see below for more info)
- Foliage color:
Glossy deep green
- Season of interest:
Flower gardens, Landscaping, Specimen, Flowering hedge
- Cannot ship to:
AK, CAN, HI, PR
More Info, How-To's, Videos and more
Soil: Bigleaf hydrangeas require well-drained but moist soil. A good layer of mulch is very helpful for minimizing drought stress and conserving moisture..
Light: plants can take full sun (6+ hrs/day) in cooler areas, but afternoon shade is recommended in warm climates. If your plant frequently wilts in the afternoon even though it was recently watered, that may indicate the spot is too sunny for it.
Water: Average to abundant (as long as soil is well drained).
Space: Min. 3' apart
Fertilizing: Fertilize in early spring, once the ground has thawed, with a granular rose fertilizer. Make an additional application in late spring/early summer if desired.
Winterizing: Do not cut plants back for winter! Doing so will cut off all of the flower buds for the following season. If plants show a lot of dieback in spring, consider moving them, as this indicates the spot may be too cold for the plant.
Maintenance: It is best to avoid pruning bigleaf hydrangeas altogether. Any dead wood can be pruned out in early spring, once the new growth has begun to emerge and its clear where any winter damage occurred. However, hydrangeas should not be trimmed or pruned regularly. If plants do not flower reliably, move them to a more protected spot in your yard; early spring is an excellent time to do that. Notes on flower color: The flowers of bigleaf hydrangeas can vary from pink to purple to blue, depending on soil chemistry. You must have both an acidic soil and the presence of aluminum (a naturally occurring soil element) in order for blue/purple color to develop. Get a soil test from your local Cooperative Extension before applying any color change treatment to be certain that it will be effective.
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