Hardy geraniums are a group of flowering perennials that include many cultivars of the genus Geranium’s several species and hybrids. They go by the names real geraniums, perennial geraniums, and wild geraniums collectively. Other popular names for geraniums are wild geranium, crimson geranium, and cranesbill geranium (Geraniummacrorrhizum) (Geraniummaculatum). Many garden cultivars are the offspring of hybrids created by combining different species.
Tip
Beginners frequently mistake these perennial kinds for an other kind of plant that goes by the name of geranium. They may also be known as zonal geraniums, although the classic annual “geraniums” you see in deck planters and cemetery urns are actually Pelargonium x hortorum hybrids.
The Geranium genus contains a wide range of species, but the majority of those that are grown commercially are low-growing, thick carpet-like plants with flower stalks that poke and weave among other plants. The plant’s surface is covered in flowers that are various colours of white, pink, magenta, purple, and blue. The tiny, cup-shaped flowers, which are about an inch in diameter, draw a lot of butterflies and bees.
Depending on the variety, hardy geraniums can be used in a variety of ways in the landscape. While some types make excellent ground cover or rock garden plants, others are perfect for forest gardens and settings with some shade. Some hardy geraniums only bloom once, generally early in the growing season, while the majority begin to bloom in the middle of the summer and continue to bloom occasionally all through the growing season. Newer cultivars, including “Rozanne,” bloom continuously all summer long.
Which Geranium is the hardiest?
Your Garden’s Best Hardy Geraniums
- Plant named “Brookside” (Cranesbill)
- Plant named “Elke” (Cranesbill)
- Plant named “Mavis Simpson” (Cranesbill)
- “Orion” geranium (Cranesbill)
- Gardenia patricia (Cranesbill)
- Rosane geranium (Cranesbill)
- Pink “Sweet Heidy” geranium (Cranesbill)
Hardy Geraniums vs. Pelargoniums
Pelargoniums should not be confused with hardy geraniums. You might be wondering what makes a geranium different from a pelargonium. Similar to some siblings, they are both members of the same plant family, but they could not be more unlike.
Pelargoniums cannot withstand frost, while hardy geraniums can. Pelargoniums are usually treated as annuals and replanted each year, but true hardy geraniums are perennials that grow back every year. Pelargoniums die in the winter.
Prune your Hardy Geraniums
Your sturdy geraniums will look their best and promote new growth if you prune them properly. By correctly pruning your hardy geraniums after the blooming season, you can encourage repeat blooming. The majority of geraniums can be cut back twice in a single season, which allows them to bloom at least three times.
When to Prune
Your hardy geraniums should be pruned in accordance with the season you are in. Rozanne will require various cuts in the spring, summer, and fall. To maintain your blooms rich and healthy, mark your calendar and adhere to our seasonal trimming recommendations.
What tools you need
Your geraniums may be pruned fairly easily. All you’ll need is the ability to prune, a pair of sharp pruners, your favorite mulch, and your favorite gardening gloves. Watch this video to learn more about pruning strategies in detail.
How to prune
You shouldn’t be concerned that pruning your flower’s back will harm her. The majority of hardy geraniums require trimming to promote new growth and prevent them from encroaching upon other plants.
Trim the plant back to within a few inches of the ground or to about an inch above the main stem once the flowering is completed or you find old growth. Remove any brown stems or yellow leaves after that by going inside.
Soon after trimming, more leaves will start to appear. Some resilient geraniums even have the ability to blossom again. Maintaining correct pruning on your plants encourages new development and keeps them from spilling out throughout your landscape.
What pruning advice do you prefer? Share them with us in a comment on our Facebook page!
What kind of plant is a perennial Geranium?
A variety of colors can be seen in the leaves and flowers of perennial geraniums. Pink, purple, red, burgundy, blue, and white are among the flower’s colorations. Veins in blossoms are frequently darker in tone, giving petals a whisker look. The blooming season for many hardy geraniums runs from spring to July. This group includes geranium ‘Max Frei,’ a kind of bloody cranesbill (Geranium sanguineum), and wild geranium (Geranium maculatum). Some cultivars, such as Rozanne or Geranium ‘Johnson’s Blue,’ bloom continuously.
The split leaves of hardy geranium plants add a wonderful texture to landscape designs. Green, burgundy, gold, or almost-black leaves, like those of the cranesbill geranium variety “Dark Reiter,” are possible leaf hues (above). Some geraniums, like the natural wildflower Geranium maculatum, have vibrantly colored leaves in the fall that range from orange, gold, and crimson.
Hardy geraniums come in a variety of sizes, from 6 inches to more of a knee-high, 18-inch plant. While some have stems that spread and creep their way across the garden over the growing season, others produce neat tufts in a planting bed. From Zones 5 to 9, perennial geraniums are typically hardy.
How high can hardy geraniums grow?
Another hybrid variety, “Patricia,” was produced by crossing Geranium endressii and G. psilostemon. While hardy geraniums of the trailing and mounding varieties have their place along the border, some circumstances necessitate a taller plant. ‘Patricia’ stands roughly 30 inches taller than the average person. To create the impression of a breezy garden, plant this type next to decorative grasses or baby’s breath.
- The progenitor species of this nursery hybrid are indigenous to the Pyrenees and southwest Asia.
- Zones of Agriculture: 58
- 1218 inches tall
- Sun exposure: moderate shade to full sun
Geranium ‘Rozanne’
Huge, vivid violet blue, saucer-shaped flowers are held above mounds of deep green foliage that has a faint chartreuse marbling and prominent white eyes. One of the garden’s perennials with the longest bloom times is the geranium “Rozanne.” Given that its flowers are sterile, it is an impressively free-flowering variety that continues to bloom from late spring until mid-fall.
Give this perennial lots of freedom to expand widely. One healthy plant can cover an area of 2-3 square feet in a single season. When combined with yellow or chartreuse flowers or foliage, it looks very lovely. the Rozanne and FriendsTM series.
Hardy geraniums make excellent filler plants for both home and commercial landscapes. They complement the majority of other perennials well and provide constant color all year long.
How are hardy geraniums cared for?
Hardy geraniums can be grown in the sun or the shade in moist but well-drained soil. After flowering, prune back the plant to promote a second flush of blooms. Hardy geraniums wither in the fall and reappear in the spring. Plants will continue to grow well for several years if they are mulched annually with leaf mold, well-rotted compost, or horse manure.
Are hardy geraniums contagious?
Among the most common garden perennials are hardy geraniums, sometimes known as cranesbills. And it’s clear why. They require little care and maintenance, are hardy, easy to grow, and tolerant of a variety of environmental factors.
The bloom color ranges from vibrant to subdued violet, blue, pink, magenta, and white hues, and many have appealing veining in a stronger, contrasting hue. Throughout the summer and well into autumn, several types flower nonstop for months at a time, and some even begin blooming as early as late April. When in bloom, the flowers, which are typically rather small, are produced in such great quantities that they almost completely cover the plants.
Numerous species’ hand-like foliage, which exhibits varied quilting, veining, and color blotching, is also very appealing in and of itself. Additionally, because many of the popularly cultivated kinds are low-growing, they make wonderful ground cover plants due to their dense, carpet-like leaf.
They should not be mistaken with the very similarly related pelargoniums, which aren’t and are primarily used as summer bedding plants, as they are cold- and frost-hardy.
Cultivation
There are kinds that can thrive in direct sunlight, light shade, and even pretty deep shadow. They generally thrive in early morning and late afternoon sun, while some, like Geranium sanguineum and Geranium pratense and their variants, grow well in full light as long as the soil has enough moisture.
Hardy geranium varieties
There is at least one hardy geranium for every garden, every gardener, and every circumstance as there are about 70 species and 700 types to choose from!
Here are the top 10 items that the Royal Horticultural Society suggests:
- Ann Folkard, geranium
- (Cinereum Group) Ballerina named Geranium
- Clarkei Kashmir White Geranium
- Red geraniums
- Theodora Mavis Simpson
- Ingersoll Orion
- The Mrs. Kendall Clark geranium
- Wageningen’s Geranium x oxonianum
- Renardii geranium
- Jolly Bee and Geranium Rozanne (Gerwat)
Planting hardy geraniums
Hardy geraniums can be planted at any time of year, but planting in the fall or winter will ensure that the plants take root effectively and provide an abundance of flowers in their first season. For planting from late autumn to late winter, mail-order vendors often offer bare-rooted plants.
Make a hole that is sufficiently large to readily fit the rootball. Fork in a layer of organic material, such as compost or planting compost, at the bottom of the hole.
Place the rootball in the planting hole, adjusting the planting depth until the rootball’s top is level with the soil and the rootball is planted at the same depth as it was growing initially.
Fill the planting hole with the excavated soil after adding more organic matter to it. To maintain soil moisture and aid in weed control, thoroughly water the area around the tree, then sprinkle a granular general feed over the surrounding soil. Finally, put a 5-7.5cm (2-3in) deep mulch of well-rotted garden compost or bark chips around the tree’s root area.
How to care for hardy geraniums
The majority of hardy geraniums are undemanding, low-maintenance plants.
When the weather is dry during the first year, water thoroughly. To maintain healthy plant growth in succeeding years, watering may be required during extended dry spells.
Late spring mulching around the plants will assist retain soil moisture and control weed growth.
Plants may start to seem messy with sloppy growth after the first early flush of blossoms has faded. After the initial flowering, the majority benefit from a trim to freshen the foliage and promote more blooms. To get rid of the outdated, messy growth, just cut the plants with a pair of shears or secateurs, or more forcefully if necessary, to a height of 5-7.5cm (2-3in) above the ground.
Then feed them with a liquid plant food to promote new growth and additional flowering flushes. After each flowering, pruning and fertilizing can be done again to extend the flowering season of many kinds well into the fall.
With the arrival of colder weather in late autumn, most geraniums’ foliage will start to fade. If you trim the plants’ leftover stems and leaves, they’ll grow new, fresh growth the following spring.
Over time, hardy geranium plants expand, spread, and form enormous clumps. These can be chopped into halves or quarters with a sharp spade. This can be done in the spring when they begin to grow or in the autumn. Every three to five years, divide them to maintain good growth and flowering.
For the winter, should geraniums be pruned back?
You should prune a perennial geranium after it has bloomed all season and starts to wither. This helps the plant store energy for the spring while simultaneously keeping it dormant for the winter. This could need to happen any time between August and late October, depending on your zone. Cut perennial geraniums down to 2 or 3 inches above the soil with a pair of trustworthy shears, ideally at nodes or new growth points. Take out any more flowers or foliage. You’ll have a collection of thick stems that is really ugly. But don’t panic, your blooms will return in full bloom the following spring.
Is it necessary to deadhead my geranium?
You should attempt to deadhead your geraniums as frequently as they require it for the most profusion and durable blooms. If you’re really motivated, you can check on your plants every day and remove any flowerheads that are starting to look a little drab.
But if you don’t have much free time, don’t worry—once a week or so will still have an impact on your plant’s development.
- Do you need additional ideas for container gardening? Our section on window box ideas has several.
What hues are available in hardy geraniums?
For those who are unaware, a “geranium” is that common annual plant that is frequently found in hanging baskets, window boxes, and burial urns. It has fleshy leaves and long flower stalks. That species, however, is actually a part of the Pelargonium genus of plants, and has been since 1789, when the genus was split off from the Geranium genus. It is frequently referred to as “garden geranium” or “annual geranium.”
True geraniums, hardy geraniums, cranesbills, and storksbills are all common names for perennial flowering plants that are very different from other members of the Geranium genus. The second and third names come from the seed pods’ likeness to those birds’ beak.
Low-growing rhizome-spreading plants are hardy geraniums. The foliage is frequently toothed and is beautiful all year long. The plant’s surface is covered in flowers that are various colours of white, pink, magenta, purple, and blue. Hardy geraniums play a significant part in the perennial border garden despite having considerably more subdued flowers than the vibrant annual Pelargoniums.
All summer long do hardy geraniums bloom?
Hardy geraniums are bursting with flowers and have luxuriant foliage that gives the yard a great texture. They give a lot and demand very little since they are incredibly resilient, pest and disease resistant. The majority of hardy geraniums are absurdly simple to grow. They only need a soil that is well-drained and reasonably rich. In typical summer conditions, a few species are even reliably drought tolerant.
Some hardy geraniums have flowering seasons that last from late spring to late fall, which is quite long (if cut back hard after the first flush of blooms starts to fade in early summer). The better types will bloom constantly throughout the summer, bringing cheery color to your garden.
There are many different colors and textures to pick from to enhance the beauty of your landscape. Consider these top-performing types if you’re searching for a stunning, low-maintenance, hardy geranium that can withstand the seasonal difficulties. You’ll see that several of them have won the esteemed Royal Horticultural Society Award of Garden Merit!