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
- Geranium 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.
When should cranesbill geranium be pruned back?
Hardy geraniums, also known as cranesbill geraniums, received their name from the way their seed pods are shaped; they resemble a crane’s bill. Hardy spreading perennials called cranesbill geraniums are used as fillers between gardens and shrubs, as a low-growing border, and to conceal the barren “ankles” of taller plants. The care of cranesbills is not very demanding. Your cranesbill will thrive and spread cheerfully if you prune the clumps three times a year and fertilize once in the spring. Give cranesbills lots of space because they want to spread out and aren’t afraid to encroach on (smother) nearby plants.
In the early to midspring, just as growth starts to show, prune cranesbill geraniums.
Trim damaged and dead stems back to just above the crown. Cut back side branches to the crown or shorten them by several inches if your cranesbill is expanding beyond its original location.
- Hardy geraniums, also known as cranesbill geraniums, received their name from the way their seed pods are shaped; they resemble a crane’s bill.
- Hardy spreading perennials called cranesbill geraniums are used as fillers between gardens and shrubs, as a low-growing border, and to conceal the barren “ankles” of taller plants.
Midsummer or after the flowers have started to fade is the best time to prune cranesbill geraniums back to 6 to 7 inches. They will remain more compact as a result, and late summer will see another blooming burst.
In the early to mid-fall, prune faded flowers by making cuts just above a sturdy branch or bud.
Can cranesbill be transplanted?
Reflowering: Geraniums typically sprawl after bloom, with the exception of the Bigroot Geranium (G. macrorrhizum) and Bloody Cranesbill (G. sanguineum) kinds. After the initial blooming wave, severely prune plants, leaving 2-3 inches of stem above the earth. They will react by producing a fresh crop of leaves that looks lovely throughout the season and, depending on the variety, perhaps irregular reblooming.
Cranesbill rarely has to be divided, though some plants can be divided into different divisions and replanted in the spring or early fall. Early in the spring, carefully transplant.
End-of-Season Care: If desired, prune back in the fall after multiple fatal frosts.
Early Spring: When new growth starts to develop, side-dress with compost and organic amendments or apply a little application of balanced or slow-release fertilizer. When there is a lot of rain for a long time, add nitrogen to prevent natural leaching. Since most plants prefer a soil that is consistently moist, water well if it is unusually dry. If you need to, transplant the plant right away. In some types, you can also cut off a few sections of the plant’s edges that have roots to help with propagation.
Mid-Spring: Supporting taller or sprawling kinds with brushy twigs or interlaced, thin stakes is beneficial.
In the summer, trim plants by removing any dead or yellowing leaves. Trim back to three inches if plants are taking up more room than they should; the new foliage will look great the rest of the season.
Cut back foliage in the fall to the soil line. Mulch to prevent plants from heaving out of the soil in the winter when the earth has frozen.
Can geraniums be split?
Hardy geraniums are clump-forming perennials that can be divided to produce more plants, rejuvenate an overgrown clump, or maintain good flowering. An established plant is divided into multiple sections, each of which has a portion of the roots.
Coral Bells (Heuchera)
Coral bells (or Heuchera) boasts colorful foliage from spring to fall, and even through the winter in warmer climates. Coral bells shouldn’t be pruned in the late fall whether they are evergreen in your zone or not. Why? Through the winter, their foliage shields their crown. All you need to do is tidy up the plant in the spring to ensure another year of bright color!
Coneflowers (Echinacea)
Long-blooming perennial coneflowers (Echinacea) give bright color from summer till frost, but it doesn’t stop there. With noticeable seed heads, their flowers continue to be interesting long after they have faded. The seeds are adored by birds and other creatures, and they are frequently visited during the fall and winter by goldfinches, blue jays, and cardinals. You can always chop them if you’d prefer, but we advise leaving them standing in winter to bring texture and liveliness to the winter garden!
Black-Eyed Susan (Rudbeckia)
Black-eyed Susans, commonly known as Rudbeckia, share the prominent center cones of coneflowers and can be kept standing throughout winter. In the late fall and winter, you can see birds sitting on their wasted seed heads, which gives the winter garden a little bit of interest and excitement! It won’t harm the plant if you choose to cut them for a neater winter appearance.
*In the fall and winter, we adore how their black dry seed heads appear in dried flower arrangements!
Ornamental Grasses
Even though ornamental grass is merely a perennial, planting it is a proven way to give your garden four seasons of pleasure! The landscape is enhanced by the height, color, movement, and structure of ornamental grasses. The foliage takes on rich gold tones even when it is dormant in the winter and retains its structure until it is chopped down in the spring.
*Dried plumes can be brought indoors for decorating or used to hold snow and frost in the landscape.
Ferns
What makes ferns so great? observing the springtime emergence of their fresh fronds and their summertime unfolding. The fronds give the garden a fluffy texture and rich green, purple, or silver hues. Even though they may lose some of their color in the winter, they continue to offer texture and guard the crown until the spring when fresh fiddleheads sprout. Wait till you see new fronds sprouting in the spring before cutting back old ones!
Milkweed (Asclepias)
As a perennial native plant, milkweed (Asclepias) is essential for year-round pollinator support. Its leaf provides food for Monarch caterpillars in the spring. Clusters of nectar-rich blooms provide food for bees, butterflies, and birds in the summer and early fall. Keep your milkweed standing in the late fall and winter to give nesting pollinators a place to hide. They’ll be grateful to you come spring!
Red Hot Poker (Kniphofia)
Red hot poker, also known as Kniphofia, is a South African native that tolerates heat, humidity, and direct sunlight well. Temps throughout the winter? Despite the fact that some kinds are hardy down to zone 5, not really. To safeguard the crown, we advise leaving the foliage standing all winter. The flower stalks can be cut off, but save the rest of the cleanup for spring!
Cranesbill (Geranium)
Even in the winter, cranesbill (also known as geranium) is a hard-working perennial in the garden. They are semi-evergreen, which means that in moderate areas, they retain their green foliage throughout the winter. To enjoy some extra greenery during the winter, put off cutting the foliage back until April.
*You can always trim back cranesbill if you’d like if it isn’t an evergreen in your zone.
Stonecrop (Sedum)
Stonecrops (Sedum) may resemble indoor succulent plants in appearance, but they are surprisingly winter-hardy plants. Although their foliage and blossoms will wither away in the winter, we don’t advise cutting them. Why? On erect sedums, the dried flower stalks provide texture, color, and food for wildlife. They also have a lovely appearance while holding recently fallen snow!
False Indigo (Baptista)
Due to the sound-absorbing properties of snowfall, the garden is typically silent in the winter. Even though it’s inactive, false indigo (Baptisia) alters that by introducing texture, motion, and noise. Fall sees the replacement of spent blooms with seed-filled black pods that resemble tiny maracas. They make a little music when they rustle in the winter winds.
Is it necessary to deadhead cranesbill geranium?
When my cranesbill geranium has finished blooming, should I deadhead and prune it back? The leaves frequently have ugly spots on them.
Although deadheading won’t increase flowering, it will make the plant seem better. Many gardeners postpone the time-consuming task of deadheading in favor of pruning back the entire plant later. When the plant starts to look bad, remove the seedheads and the old leaves. To reveal the flush of new growth at the plant’s base, remove old leaves. For the winter, leave the leaves uncut. In the spring, either get rid of the old foliage or let the new growth come through and cover it.
Do hardy geraniums need to be pruned back?
Hardy geraniums require hardly any maintenance. Rabbits don’t seek them, while slugs and snails prefer to consume other plants. After their initial flowering, they can be trimmed right back to the ground, and the next summer, they will produce new foliage and additional blooms. Avoid cutting back too soon after flowering because some hardy geraniums have lovely autumn leaves.
Propagating hardy geraniums
Hardy geraniums don’t typically need to be propagated because seedlings may be easily removed from the garden and potted up. In the spring, plants can be lifted and divided. Hardy geraniums can be challenging and time-consuming to grow from seed.
Growing hardy geraniums: problem solving
Geraniums that are hardy are generally trouble-free. However, the geranium sawfly larvae have been known to attack them (Ametastegia carpini). These appear to be 12mm long, small grey caterpillars. They leave unattractive lace-like holes in the leaves after they eat them. In your garden, the more resilient geraniums you have, the more probable it is that they will reproduce.
Since they fall off the leaves when the plant is disturbed, the larvae might be challenging to see. The months of May and September see the most activity; the September generation pupates in the soil and spends the winter there before emerging in the spring to deposit eggs on the foliage. Even though the damage can be extremely unattractive, the plant rarely becomes less vigorous as a result. The following steps could assist in keeping them in check:
- Many geranium sawfly larvae overwinter in the soil, therefore clearing away debris and lightly raking the soil beneath vulnerable plants will expose the larvae to the elements, where they will be killed by frost and devoured by birds and other predators.
- From May on, carefully inspect the undersides of leaves for signs of the eggs and larvae and remove them by hand if possible to prevent numbers from growing.