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Hydrangea serrata Frozen Smoothie ® - Mountain Hydrangea

Hydrangea serrata ‘SMNHSI’ Frozen Smoothie ®
Mountain Hydrangea, Tea of Heaven

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This plant carries a 24 months recovery warranty

More information

A compact hydrangea from the Flair & Flavours® series that bears flat inflorescences along its stems, from summer until the first frosts. Their colour varies from pink to blue depending on the acidity of the soil, and its green foliage turns red in autumn. Reaching approximately 70–80 cm in all directions, it is perfect for borders or containers. Cultivate in partial shade in a humus-bearing, cool, but well-drained soil. Hardiness: down to -25 °C.
Flower size
15 cm
Height at maturity
80 cm
Spread at maturity
80 cm
Exposure
Partial shade
Hardiness
Hardy down to -23.5°C
Soil moisture
Moist soil
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Best planting time March, October
Recommended planting time February to April, September to November
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Flowering time June to October
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Description

The Hydrangea serrata Frozen Smoothie is a hydrangea from the Flair & Flavours® series, distinguished by its repeat flowering that occurs along the entire length of the stems. Its inflorescences, in flat corymbs, will be pink in neutral to alkaline soil or lavender blue in acidic soil. They renew themselves until the frosts, while the foliage takes on a red hue at the end of the season. It is a small, very compact bush, suitable for lightly shaded borders as well as container cultivation.

Belonging to the Hydrangeaceae family, this cultivar referenced under the code 'SMNHSI' was selected in 2014 by Tim Wood (Spring Meadow Nursery, Michigan); it originates from a sowing of 'Mak20' (Tuff Stuff range), which explains its good hardiness and its ability to flower along the entire stem; in North America, it is classified as a hybrid of Hydrangea macrophylla and H. serrata and bears the commercial name Let’s Dance Can Do!®.
It is a bush with a rounded, bushy habit, forming a cushion 70–80 cm in all directions. Its upright, ramified stems are smooth, greenish-brown, then become reddish-brown with age. The leaves, ovate to elliptical, with a finely dentate margin, 6–12 cm long, of a medium green, turn purplish-red in autumn; they are deciduous, absent in winter. The inflorescences are large corymbs, composed of small central fertile florets surrounded by numerous sterile florets. These inflorescences bloom both at the tip and along the stems; flowering extends from June to September-October, often until the first frosts. The plant is hardy to approximately −25 °C.

A small-sized bush, this Frozen Smoothie Hydrangea is not strictly a heather soil plant, but it likes humus-bearing, rich, cool, and well-drained soils. It is a very good variety for cultivation in pots or containers, on a balcony or terrace sheltered from the afternoon sun. In the garden, plant it in a lightly shaded border, at the edge of trees, in the company of plants sharing the same needs. To extend the flowering season, consider Japanese azaleas for early spring, dwarf rhododendrons for the month of May, and the Glory Bower Clerodendrum trichotomum Variegatum for autumn.

The botanical species Hydrangea serrata is native to the mountains of Japan and Korea where it grows in cool forest edges and undergrowth; the epithet "serrata" refers to the finely dentate margin of the leaves, while "Hydrangea" comes from the Greek hydor (water) and aggeion (vessel) in reference to the capsules. This species is also called "mountain tea"; its leaves, rich in phyllodulcin, are used locally to prepare a traditional herbal tea (amacha in Japan).

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Hydrangeas: planting, pruning and care
Family sheet
by Alexandra 20 min.
Hydrangeas: planting, pruning and care
Read article

Hydrangea serrata Frozen Smoothie ® - Mountain Hydrangea in pictures

Hydrangea serrata Frozen Smoothie ® - Mountain Hydrangea (Flowering) Flowering

Plant habit

Height at maturity 80 cm
Spread at maturity 80 cm
Habit irregular, bushy
Growth rate normal

Flowering

Flower colour two-tone
Flowering time June to October
Inflorescence Corymb, Cyme
Flower size 15 cm
Repeat-flowering Blooms several times a year

Foliage

Foliage persistence Deciduous
Foliage colour dark green

Botanical data

Genus

Hydrangea

Species

serrata

Cultivar

‘SMNHSI’ Frozen Smoothie ®

Family

Hydrangeaeceae

Other common names

Mountain Hydrangea, Tea of Heaven

Botanical synonyms

Hydrangea serrata 'SMNHS', Hydrangea Frozen Smoothie ® (FLAIR & FLAVOURS series ), Hydrangea Let’s Dance Can Do!®

Origin

Cultivar or hybrid

Product reference25095

Planting and care

Plant the Frozen Smoothie Hydrangea in spring or early autumn, preferably in a lightly shaded position, for example against an east-facing wall, or even north-facing. In very cold regions, it may be prudent to protect its stump with a thick mulch. Shelter it from cold, drying winds. It does not necessarily require heather soil, but appreciates a deep, cool, yet well-drained, fairly fertile soil. In poor soil, enrich with a good base fertiliser before planting, and mix the existing soil with a substrate containing a portion of compost...
If the soil is dry at the foot of the wall, position the root ball at least 30-40 cm from the base of the wall, and incorporate plenty of well-rotted compost to better retain moisture in the soil. After planting, be mindful of slugs, which are quite fond of young leaves. Very hardy, it does not fear being planted in cold regions. Water regularly during hot periods to prevent the foliage from wilting during dry spells.

This variety of Hydrangea is also particularly well-suited to cultivation in a pot or decorative container due to its fairly compact dimensions. In this case, ensure you choose a compost for ericaceous plants, and water regularly to keep this substrate moist. In the event of a cold winter, shelter the pot in the corner of a wall, or even in a garage in case of severe frost, as container cultivation exposes the roots more to frost.

Planting period

Best planting time March, October
Recommended planting time February to April, September to November

Intended location

Suitable for Woodland edge
Type of use Border, Edge of border, Small gardens, Container
Hardiness Hardy down to -23.5°C (USDA zone 6a) Show map
Ease of cultivation Beginner
Exposure Partial shade
Soil pH Acidic, Neutral
Soil type Silty-loamy (rich and light)
Soil moisture Moist soil, well-drained, rich, deep

Care

Pruning instructions Prune in late winter to early spring, when the buds are swelling: cut back faded flowers just above the first pair of healthy buds and remove any dead or frost-damaged wood; avoid any severe pruning that would reduce flowering.
Pruning Pruning recommended once a year
Pruning time March to April
Soil moisture Moist soil
Disease resistance Good
Overwinter Can be left in the ground

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