Cityline® Rio Hydrangea

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Blanketed by vibrant, colorful flower clusters. This compact beauty features lovely blue and green blooms. Grows well in most soil types, but requires acidic soil pH to produce the most intense blue/purple coloring. Heat-tolerant. Matures to be 2- to 3-feet tall and wide in full sun or partial shade. Blooms in summer on buds set the previous year. May be covered by patent (U.S.P.P. application filed). Ragra cultivar.

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Since 1816, Stark Bro’s has promised to provide customers with the very best fruit trees and plants. It’s just that simple. If your trees or plants do not survive, please let us know within one year of delivery. We will issue a one-time merchandise credit to your account equaling 125% of the original product purchase price. Read more about our warranty policy.


Bloom Color Blue, Purple
Shade/Sun Partial Shade - Full Sun
Soil Composition Loamy
Soil Moisture Well Drained
Soil pH Level 4.5 - 6.0
Zone Range 5 - 9

Zone Compatibility

This Variety's Zone Range 5 - 9
My Hardiness Zone ?
The USDA hardiness zones offer a guide to varieties that will grow well in certain climates. Each zone corresponds to the minimum winter temperatures experienced in a given area. Make sure that your hardiness zone lies within the zone compatability range of this variety before ordering.

Tools & Supplies

Having the proper tools and supplies when growing your own can make the difference between a good harvest and a great harvest! Here's a list that our experts recommend for this variety.

Planting & Care

Learn all about how to grow hydrangeas in The Growing Guide. An entire section of our website dedicated to your growing success.

Questions & Answers

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Browse 6 questions Browse 6 questions and 11 answers
Why did you choose this?
Stark Bro's Store
This is the most beautiful colors in a hydrangea!
Scott U on Mar 31, 2016
This is the most beautiful colors in a hydrangea!
Scott U on Mar 31, 2016
Striking color, and I can plant in front of my blueberry bed, taking advantage of the acid soil I already maintain
Zoe K on Mar 8, 2016
Striking color, and I can plant in front of my blueberry bed, taking advantage of the acid soil I already maintain
Zoe K on Mar 8, 2016
do deer eat Hydrangea?
Nancy H on Jun 26, 2016
BEST ANSWER: I am surrounded by hundreds of acres of woods but the deer have not
touched my hydrangeas yet (but I do have a dog).
Is the cityline Rio hydrangeas a Perennial? Are All hydrangeas perennials?
Michael L on Jul 20, 2017
BEST ANSWER: Ours has come back each year, we live in Virginia with snow and hot heat, it has done fine.
What other plants do you recommend so as to complement these hydrangeas?
Cynthia M on Jun 16, 2016
BEST ANSWER: I would use different shapes of plants , hydrangea I see as round shape. I would use complementary colors and also bloom times. This would give a pleasant look to the area. I would choose a perennial or two and even another stub, maybe more upright. Also think about color of a ground over. In each area I use a stately tree, understory tree, shrubs, perennials, and ground covers. This brings the eye up and down and across.
what are the pollinators to use for this hydrangea? there aren't any listed.
kathy lynn m on Jun 11, 2019
BEST ANSWER: Hydrangeas don't require a pollinator; they are not a fruiting shrub.
how heat tolerant is this plant? I want in front of house facing the south-west witch receives about 10 hours of full sun each day.
Doris F on Mar 16, 2017
BEST ANSWER: Cityline Rio Hydrangea is suited to zone 9, which is quite far south. If you want to see if this plant is specifically suited to where you live, enter your ZIP code at the following link: //

Customer Reviews

4.0 / 5.0
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1 Star
Product not showing flowers at this time. Other hydrangea in area are blooming. Product looks healthy otherwise
June 4, 2018
over 3 years ago
They are beautiful.
We lost one this winter. I'm not sure which one until the other two bloom.
June 13, 2017
over 4 years ago