- It will be a climbing hydrangea if the plant is climbing. This is a simple one.
- The plant is of the paniculata type if the hydrangea is a tree with a single trunk.
- Go to Leaf Shape if the plant is a shrub.
Number of Leaves per Node
The point on the stem where one or more leaves are attached is known as a node. Examine the older, larger leaves on the stem rather than the more recent, smaller leaves at the stem’s tip since they develop differently. Since the amount of leaves might differ from stem to stem, examine each one. It’s possible for young or poorly growing paniculatas to lack three leaves.
- A plant is of the paniculata type if at least one of its nodes has three leaves emerging from it.
- Move on to petiole length if none of the nodes have three leaves.
Hydrangea paniculata, node with three leaves, gazing down the stem, by Robert Pavlis
Petiole Length
The brief stalk that joins the leaf to the main stem is known as a petiole. On a few of the elder leaves, measure the petiole length. The petiole near the branch’s tip is still growing, so ignore the tiny leaves there.
- The type is likely arborescens if the majority of the elder petioles are longer than 1 inch.
- A macrophylla is most likely the species if the majority of the older petioles are less than an inch long.
What kind of hydrangeas do I have, and how can I know?
The aforementioned plant traits make it simple to distinguish between climbing and oakleaf hydrangeas, hence they will not be covered in this section.
Shape of the Flower Head
- A paniculata type is most likely present if the flower head is formed like a cone.
- It is either a macrophylla or an arborescens kind if the flower head resembles a ball or a flat disk. Visit the section on Flower Color.
Robert Pavlis’ photograph of a hydrangea arborescens from the side, highlighting the flower’s dome-shaped crown
Flower Color
- A macrophylla type is present if newly opened blooms feature blue, purple, or pink blossoms.
- An arborescens type is present if the flower buds initially seem green, then turn white, and finally turn green or greenish brown as they ripen.
- You likely have a macrophylla kind if the flowers are white when they first open and remain white as they age. Although they are less common, white flowered macrophylla varieties do occur.
Note: Recent breeding is beginning to develop arborescens with flowers that have a pink tint, such as “Eco Pink Puff.” Future cultivars should have a stronger version of this pink.
Do hydrangeas come in two varieties?
Also known as hortensia, florist’s hydrangeas, and French hydrangeas. The most typical variety of hydrangea to be found in the US is this one. Mophead, lacecap, and mountain hydrangeas are the three different varieties of hydrangea macrophylla. As long as the winter is not too harsh and dry, some mophead hydrangeas can survive in colder climates. After a prolonged warm weather, hydrangeas are most vulnerable when exposed to a freeze. Additional protection could be needed there.
What distinguishes a hydrangea serrata?
Zones: 5–9. partial shadiness blooming season: summer Size: 2 to 4 Scattered: 2 to 4 pink, red, and blue Old wood of various kinds and young wood both bloom (some newer varieties such as Tuff StuffTM)
Mountain hydrangeas don’t grow as large but are extremely similar to the lacecap kinds of big leaf hydrangeas.
Like Hydrangea macrophylla, Hydrangea serrata blooms on old wood, but because it’s a mountain hydrangea, it has hardier buds. They are therefore less susceptible to being harmed by late frosts.
Similar to Hydrangea macrophylla, the acidity of your soil can cause the blossoms to shift from pink to blue (and vice versa). (They change color to pink in more alkaline soil and blue in more acidic soil.)
This Hydrangea is a fantastic option for growing in containers because of its compact form.
Identification
Hydrangea serrata resembles a more compact Hydrangea macrophylla, as I have indicated.
However, they might be mistaken for a young Big Leaf Hydrangea with ease. Consequently, it may be difficult to recognize them.
Fortunately, they also need the same growing and care as their larger counterparts, so treating them as such won’t pose any issues.
Common varieties:
- Reblooming mountain hydrangea Tuff StuffTM with pink or blue flowers (depending on the soil pH). Purchase HERE.
- Tough Stuff Purple or blue flowers, or reddish pink and green blossoms (depending on the soil pH). Purchase HERE.
What color are the leaves of a hydrangea bush?
The oakleaf hydrangea, Hydrangea quercifolia, is more often known by this name. Unlike most other hydrangeas, it is frequently grown for its oak-leaf-like leaves, which can grow to a length of 8 inches. The plant’s delicate pink blossoms are more prominent in the spring than the drab, grayish green leaves. The leaves turn darker as summer heat sets in. The plant transforms into a focal point in the fall as the foliage becomes dazzling red and orange.
Should hydrangeas undergo a fall pruning?
Only prune these hydrangeas in the summer after bloom, not in the fall. In August and September, old wood hydrangeas begin to form their bloom buds for the following year. It is advisable to delay pruning your hydrangeas until the following year if you don’t do it right away. If not, there won’t be any blossoms the next spring.
Should you prune your hydrangeas?
When should I prune my hydrangeas? is one of the most often asked gardening topics. We all have a tendency to want to hurry outside with the clippers and start hacking away when those billowy large flowers change from cheerful blues, purples, pinks, reds, and whites to uninteresting browns.
When to Cut Back Hydrangeas
The timing will vary according on the variety of hydrangea you have. First of all, be aware that hydrangeas do not require pruning unless the shrub has become unruly or too big for its location and requires some shaping up. Otherwise, simply deadhead wasted blooms and remove any dead branches from the plant.
How to Prune Hydrangeas02:07
But if you do decide to prune one, bear in mind to time it so that it blooms on old wood or new wood depending on the species of hydrangea you have.
If you wait too long, you can chop off the buds that are developing on old wood (stems from the year before the current summer), which would prevent flowers from blooming the following spring. Therefore, as soon as the flowers on these bushes have faded, they should be clipped.
The shrub should be clipped in the early spring before that new growth appears, but, if the shrub flowers on fresh wood (stems generated during the current season), which means that its buds are set inside the season.
How do hydrangeas appear before blooming?
The tips of the stems that Big Leaf and Mountain Hydrangeas generated last year are where they blossom (old wood). Some of those same stalks also have flowers on the sides (new wood). Still other plants bloom on stems they create this year (new wood). The old wood plants need to cling onto those blooms for approximately nine months, through late fall, winter, and early spring, beginning around August 1. Therefore, if you prune the stems of your old wood plants after August 1, you run the danger of losing the flowers that will bloom the next year.
No Pruning After August 1st
First rule: don’t prune them until the buds start to show, which may not be until June. The buds resemble little broccoli heads. Then you will know which stems and buds successfully overcame their seasonal obstacles.
If your shrub isn’t blooming, the first thing you should look at is whether or not you pruned it back. These plants often only require trimming to remove damaged, diseased, or dead stems.
Cut back these shrubs in late winter before new growth begins
Shrubs that flower on young wood typically start blooming later than old-growth bloomers, beginning in June and continuing until the first frost, because they need to grow and set buds the same year that they bloom. As long as you avoid trimming when the flower buds are opening, these shrubs are understanding if it is not done at a specific period.
1. Trim the flowers all the way back for larger blooms.
These bushes can be completely removed from the ground in late winter or the beginning of spring. If cut severely like this every year, smooth hydrangeas will produce much larger flowers, but many gardeners prefer smaller blooms on stronger stems.
2. Maintain an old growth foundation to lessen flopping
Especially after watering from above or after a heavy storm, the branches of some hydrangeas frequently topple over from the weight of their blooms. Cutting the stems to a height of 18 to 24 inches will help to reduce this flopping by creating a strong framework for fresh growth.
Janet Carson is the University of Arkansas Cooperative Extension Service’s horticulture specialist.
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What kind of hydrangea is the most popular?
Summer, ah! A time for sun tea, hammocks, and what’s this? The hydrangea is the summertime flower to have! This popular bushy garden plant doesn’t only come in one size fits all. In North America, hydrangeas come in five primary varieties. While there are many different varieties, most hydrangea only prefer early sun (you can find lots of plants for shady spots in your garden and the best shade perennials to pair with them).
Bigleaf, or French, hydrangeas are the most prevalent variety (Hydrangea macrophylla). Mophead (large puffy balls), lacecap (identical to mophead but with tiny buds in the middle), and mountain are the three categories (similar to lacecap, but extremely cold hardy with smaller blooms). Large, cone-shaped flowers on panicle hydrangeas (Hydrangea paniculata) are typically white but can occasionally become pink depending on the cultivar. These are the only varieties of hydrangea that grow into trees as opposed to bushes.
The United States is home to two of the major hydrangea species. Smooth hydrangeas, commonly referred to as “wild hydrangeas,” can endure hotter conditions and are frequently grown as hedges. These flowers typically have white and green blossoms. In regions with warmer summers, oakleaf hydrangeas (Hydrangea quercifolia) bloom at their finest. Flowers have leaves that change from green to orange to burgundy, and they bloom in white, green, or purple.
Our list is completed by climbing hydrangea (Hydrangea petiolaris). The 80-foot-long vines that resemble these hydrangeas are in fact hydrangeas. Most have substantial, scented blooms.
Find some of our favorites of each species to include in your garden by reading on. They’ll only make your other budget-friendly backyard design ideas better!
This mophead bigleaf thrives in direct to indirect sunlight. In more acidic soils or when aluminum sulfate is added, the variegated petals, which are not all solid colors but have edges in one hue and transition into another, will blossom blue instead of their usual pink color. Since it is a dwarf type, it doesn’t require much pruning to maintain its compactness.
The bigleaf mophead has a catchy name and plenty of blooms to back it up! One of the first hydrangeas to bloom, the blossoms start off pure white before turning bright pink as they ripen. Flowers with sturdy stems stay standing in the garden and make excellent additions to bouquets and decorations.
The mophead flowers of another bigleaf hydrangea have been cultivated to bloom continuously throughout the season. The enormous blooms start out green, change to pink, and frequently return to green. Unless you have more acidic soil, the default color of bigleaves is typically in the pink and red range.
This beautiful lacecap hydrangea is one of the best at reblooming. Depending on your soil, this plant has compact, double blooms that are either blue or pink. The durable choice for gardeners in northern zones, the blossoms resemble water lilies.
This natural oakleaf hydrangea has double florets, which results in a wonderfully large, conical bloom that matures to green color. These can withstand full sun and up to four hours of shade.
The blooms on this oakleaf cultivar begin as a bright white before changing to a brilliant pink. Once fall weather arrives, the rich green leaves become a deep burgundy color.
The blooms on this extremely hardy smooth hydrangea can reach a foot in width. This particular type has lime green blossoms that become dazzling white before returning to green. They make wonderful bouquets and centerpieces due to their robust stems that are resistant to flopping.
This hydrangea’s silky, ruby-red buds open to reveal a lighter pink blossom with sharp edges. Its dark green foliage dramatically contrast with the vivid bloom. This plant is simple to care for and blooms best in a location that receives at least six hours of direct sunlight each day.
A popular plant in gardens is this panicle hydrangea. When planted as a hedge or scattered around your garden bed, the pistachio-colored blossoms look really stunning. The blossoms shift from white to blush to deep pink as fall approaches. In your garden, they can be groomed into beautiful tree shapes.
Anomala petiolaris, a climbing hydrangea, has heart-shaped leaves and big white flower clusters. Although it grows well in both sun and shade, afternoon shade is essential in the Deep South and western zones 9 and 10.
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