Sep. 3, 2016 3:00 pm
We begin planning how to overwinter our favorite plants in the late summer. The optimum time to decide which plants to maintain and which to let die from Jack Frost is around September. One of the annuals that you can save from year to year is the geranium.
However, unless you have a greenhouse with lots of light and space, they won’t blossom magnificently all winter long. There are a few ways to preserve geraniums during the winter since the majority of us don’t.
First, use a solution of one part bleach to nine parts water to sterilize any tools and pots you’ll be using to overwinter plants. Next, thoroughly check the plant to be stored for pests and disease. Pick only robust plants.
One approach is to move the entire pot into a place where there is no frost. Repot the plant if it is in the ground; if it is already potted, just bring it inside. Trim the plants down by at least half if you use this strategy to account for the lower light levels. When a plant loses a lot of leaves indoors, it means that it isn’t getting enough light to grow to its full size.
Another approach is to dig up the plant, remove the soil from the roots, and hang it upside-down in a chilly, damp basement that is between 35 and 45 degrees and has a humidity level of 80 percent. For this technique, you’ll need an old, unfinished basement. Try keeping the geraniums in a covered cardboard box with an open water can nearby to give humidity if you don’t have these ideal conditions. Try this approach while keeping water in the can in a warm completed basement or even a heated garage. The geranium will be completely leafless in the early spring, have a green stem, and may even be startlingly sprouting. Cut off the dried branches, soak the roots in water for 24 hours, and then plant. This plant should not be placed in direct sunlight right immediately because it could suffer from sunburn and perish.
Taking cuttings from the mature plant, removing the lower leaves, dipping the stem in a rooting agent, and planting them in soilless potting soil constitute the third technique. To create a tiny green home, wrap a plastic bag around the entire pot. Place the pot in a well-lit area away from the sun. Repot the plant into a new container with potting soil once it has roots, which takes three to four weeks on average. Trim the plant back if it becomes long and leggy.
When the weather warms up in the spring, move the plants outside into the shadow for a few hours each day, then gradually increase the duration and amount of light each day for about two weeks. Your geranium will be prepared at that time for its new summer position.
Call the Linn County Extension Hortline between the hours of 10 a.m. and noon on weekdays with any inquiries on seeds and other gardening-related topics at (319) 447-0647.
A scorching new geranium that can tolerate the heat of Mississippi’s summers is Caliente Orange. The MSU Extension Service and Norman Winter’s MCT
How long do geraniums take to harden?
Normally, hardening off takes two to three weeks, although it can take longer if the initial growing circumstances were warm.
What happens if plants aren’t hardened off?
Plants that are started indoors are not yet prepared to be exposed to wind or sunlight, so we harden them off. Similar to us, plants must gradually increase their exposure to sunlight otherwise they will burn.
The sensitive plants will be scorched by the sun, the cold shock, or the wind if you don’t harden your plants. Even while some plants may fully recover from burns, their growth will be delayed for a few weeks.
How to Harden Plants
Plants should be placed outside for a few hours on the first day and brought inside at night to harden. Increase the amount of time they spend in the light each day until, after three or four days, you can keep them outside all night.
Plants can be hardened off on days that are partly cloudy. On the first day, if it’s a hot day, place them in the shade, ideally in part shade. On a sunny day, it is a good idea to shade the plants with Reemay cloth or floating row cover.
For a little extra protection
Try out this ruse! Remove the bottom of a gallon milk jug, place it over your new transplant, and bury it about 1 inch deep in the ground. When you water the plants, don’t forget to remove the jugs; instead, water each plant through the hole in the top of the jug.
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!
How do you prevent leggy hard geraniums?
The majority of geraniums’ lanky growth is the result of inconsistent maintenance pruning. Although geraniums are naturally lanky, woody plants in the wild, we prefer them to be compact and bushy in our homes. A geranium needs to be pruned severely at least once a year to keep it compact and bushy and to keep it from becoming lanky. The better a geranium can maintain an attractive shape, the more frequently you prune it.
Poor lighting conditions can also cause spindly geraniums. In addition to pruning, increasing plant spacing and placing them in full sun can frequently solve the issue.
Leggy geraniums can also be caused by too much moisture. Geraniums should only be watered when the soil feels dry to the touch and should be planted in well-draining soil. Geraniums can become stunted, sickly, and spindly if they are overwatered.
How are overwintered geraniums hardened?
Geraniums can be overwintered the traditional method by being removed from their pots, being pruned back by two-thirds, having the soil removed from the roots, and being hung in the basement.
If you have a chilly, dark cellar, you might succeed as most modern basements are too warm and dry for this. If you’re eager to try this method, consider periodically rehydrating the roots in water for a few hours to prevent them from becoming overly dried out.
Put your geraniums in pots in the late winter and put them in a window or artificial light. When their development starts up again, start fertilizing them.
How can plants be hardened off in the best way?
In a shady area of the garden, leave plants out for two hours. Allow them to be outside for two extra hours the next day, perhaps with an hour of direct sunlight in the morning. Over the course of one to two weeks, gradually extend your outside time and exposure to the sun.
When ought I to begin hardening off my plants?
The process of gradually exposing transplants (seedlings) to outside environments is known as hardening. It gives your transplants the ability to resist the alterations in weather that they will experience when they are planted outside in the garden. It promotes the transition from softer, more succulent growth to tougher, harsher growth.
- Prior to putting plants in your garden, start hardening transplants.
- Placing transplants outside on warm days in a shady, protected area and bringing them inside at night is the quickest way to harden them. Increase the transplants’ exposure to sunshine every day.
- Tender seedlings should not be placed outside on windy days or when it is below 45 F. Even plants that can withstand cold weather will suffer if they are exposed to it before they have hardened.
- Reduce the amount of watering you give your plants to slow their growth, but don’t let them wilt.
- An ideal setting for hardening off transplants is a cold frame.
- Tomato plants can typically withstand light, unforeseen frosts with little harm with adequate hardening.
- Plant growth is expected to be slowed by the hardening procedure. Certain crops may suffer serious harm if the process is taken so far as to actually inhibit plant growth. Cauliflower, for instance, will only grow heads the size of a thumb. Melons and cucumbers will stop growing if they are overly hardened. If the temperature won’t drop below 50 degrees Fahrenheit, they may be stuck out there all night.
How warm should it be for plants to harden off?
When the outdoor temperature is regularly above 40 F, hardy plants can be hardened off. Plants that are half-hardy can be hardened off at 45 F.
Provide Full Sun
Make sure to give geraniums a lot of sunlight to encourage blossoming. A full day of four to six hours of sun will work wonders! Give your potted plants exposure to the south and west for profusion of blossoms.
Deadheading
Geraniums must be deadheaded in order to bloom all summer. To encourage the plant to produce new blooms, remove the spent flowers. To concentrate the plant’s energy on growing new flowers, cut off fading blooms and stems.
Don’t Grow in Large Pots
When growing geraniums, be careful not to choose pots that are wider than 7-8 inches. With enough soil held in place and a healthy plant that will continue to bloom, this size is ideal.
Remove Sick and Yellow leaves Regularly
Regularly remove the dead and yellow foliage to keep the plant looking tidy and to direct its energy toward growing new blossoms.
Apply High Potash Fertilizer
Feed geraniums a 9-6-12 mix to keep them blooming more. The high potassium concentration aids in photosynthesis by supplying nutrients evenly to every area of the plant. Dosage and directions should be found on the label.
Apply all-purpose liquid fertilizer that has been diluted to a fourth of its strength every 4-5 weeks while the plant is growing as well.
Water Only When the Soil is Dry
Keep the soil dry; geraniums are more susceptible to damage from overwatering than from underwatering. Remember to water when the topsoil feels a little dry to the touch. Ensure the container includes drainage holes as well.
I have hardy geraniums; when should I prune them?
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.