Geraniums can be overwintered inside in three different ways: as a houseplant, as a dormant bare root, or as cuttings. Your decision will be influenced by the amount of room you have indoors and the range of temperatures you can tolerate. Here is a closer examination of each method.
Overwintering geraniums as houseplants
If you want to keep the entire potted plant and have lots of room close to a window that gets bright, direct light, go with this option. A drafty west-facing window would be the ideal place for your potted geranium to spend the winter because geraniums prefer it chilly (55 to 65 F is optimum).
Wash the foliage well with your hose and repot the plant in new potting soil to prevent bringing unwanted pests from outside. You might also use insecticidal soap, which is sold in most garden centers and hardware stores as well as online. Avoid taking the plant indoors if it shows any signs of pests or illness. Only strong plants have a chance of successfully overwintering indoors.
During the winter, keep the soil wet but not damp. No more humidity is required. If the stems begin to sag, pinch them back to keep the plant compact throughout the winter. When springtime comes around, you may start fertilizing once more and transfer the plant back outside as soon as the temperature reliably rises above 50 F.
Overwintering geraniums as dormant bare root plants
This is the most typical way to overwinter geraniums, but it won’t work unless you have a dark, dry place that stays around 50 degrees throughout the winter.
First, dig up your geranium before it freezes and shake the dirt off the roots. To stop mold from forming, let the plant sit and dry for a few days before storage. Before moving onto the following phase, the roots must be completely dry.
The roots should be kept in a dark, dry place that doesn’t get colder than 45 degrees throughout the winter. Geranium roots should be kept at a temperature of 50 F. You can keep them by doing:
- It has been customary for generations to hang the plants upside-down from the rafters;
- placing them on a shelf after wrapping them in newspaper or a paper bag;
- they were put in a cardboard box.
Step 3: Every month or so, look for mold, black leaves, or limp stems at the roots. Remove any plant or root components that are harmful. Most of the stems should endure the winter in good shape. Before re-storing them if they become too wilted, give them a good bath in water and let them air dry.
Step 4: Reviving your geraniums involves cleaning them up, pruning the stems back to healthy green growth, and replanting them in new potting soil about six weeks before your final frost date. Where the new roots will grow, bury the stems two nodes deep. When you notice fresh growth in one to two weeks, keep the plants somewhat dry; after that, keep the soil moist until the plants are big enough to replant outside.
Overwintering geraniums as cuttings
If your light windowsill area is limited or you are concerned that bringing in your entire potted plant would also attract unwanted bugs, this is a nice technique to try. Additionally, it’s a fantastic way to multiply your existing geraniums.
To trim plants, you’ll need:
- a cutting edge.
- Most hardware stores and garden centers sell rooting hormone, which is sold online.
- Use little terracotta or plastic pots, or recycle a clear takeaway container for roasted chicken.
- If you don’t eat chicken, use clear plastic bags to cover the pans.
Will geraniums in pots last the winter?
One of the most popular plants for containers and gardens is the geranium. Their vibrant hues and strong, well-shaped foliage are unmatched. Geraniums typically come in larger sizes in the garden center, which raises their price compared to other summer annuals.
Geraniums may be easily kept over the winter and enjoyed again the following year, unlike many of their competitors. Here’s how to overwinter your magnificent geraniums indoors if you don’t want to see them killed by frost this fall.
Methods of Overwintering Geraniums
Geraniums can be preserved in three different ways to endure the winter:
- inside in pots during the winter.
- Keep the naked, dormant roots.
- To create new plants, propagate cuttings.
Fall:
- Carefully dig out your geraniums before the first frost and pot them in 6- to 8-inch-diameter containers with lightweight potting soil. You can skip a step if yours are already in containers! Any that appear sick or diseased should be discarded.
- Reduce each plant by a third to a half. The cuttings should be saved and rooted to produce new geraniums.
- Give the pots plenty of water.
- Put the pots in a cool, well-lit area. Temperatures around 60 F in a sunny window are ideal for geranium overwintering. They struggle in dimly lit or hot environments.
Spring:
- Give your geraniums a mid-spring fertilization.
- When the threat of frost has gone, put them back outside. You have the option of leaving them in their containers or replanting them in your flowerbeds.
Overwintering Bare-Root Geraniums
Geraniums may endure winter dormancy if maintained above freezing since they have great thick roots and stems. Geraniums can also be stored as bare roots after going dormant. Take these actions:
- Carefully pull out your geraniums and shake all the soil off the roots before the first frost.
- To keep them, place them in unsealed paper bags or hang them upside-down in a cool, dry area at roughly 50 degrees Fahrenheit (a garage is perfect).
- Pull out your geraniums every a month or so and give the roots an hour or so in water to soak.
- Then let them dry completely before re-storing.
- The stems should remain solid, but the leaves will eventually all fall off. The plant is probably doomed if the stems start to shrivel as well!
- Check your geraniums in the early spring.
- Eliminate any shriveled areas.
- Lightly prune them, removing any dead tips.
- Put the roots in water that has some plant food mixed in for a few hours.
- Place the roots in potting soil and give them plenty of water.
- Put your potted geraniums in a window that gets plenty of sun or beneath a grow light. It can take them a few weeks to awaken and begin to grow!
- You can bring them outside once all threat of frost has passed.
Propagating Geraniums From Cuttings
The final alternative is to let go of your original geraniums and take care of fresh ones that were propagated from cuttings. This is how:
- Cut off sections of the branches that are three to four inches long with a sharp knife or pair of shears. Instead of a side branch, the terminal end of the stem—the very tip end—produces the best cuttings.
- Remove any flower buds, and pinch off the leaves in the bottom third of the cutting.
- After removing the leaves, sprinkle the wounds where the cuttings were made with rooting hormone by dipping the bottom of each cutting in it.
- Each cutting should be planted with peat moss, sand, or perlite in the bottom third. You can grow them in trays or in individual pots (plastic planting trays are available with a clear cover to hold in moisture).
- Set the pots on a drainage tray and give them a thorough watering, ideally starting at the bottom (fill the tray with water and allow it to soak to keep from washing away the rooting hormone).
- Use the tray’s included cover or cover your pots with clear plastic.
- Place away from the sun in a sunny window. Although they require light, your clippings cannot withstand direct sunlight.
- By wetting the drainage tray, removing the plastic cover, or sprinkling the plants and soil with a fine mist, you may maintain the moisture level of the planting medium.
- In 6 to 8 weeks, your cuttings should begin to root. You can transfer them to their own pots with standard potting soil before the beginning of the next spring.
- Your new plants will branch out if you fertilize them and prune the new stems.
Does keeping geraniums during the winter make sense?
- Make sure you thoroughly inspect your geranium plants before bringing them inside for the winter. Look for symptoms of pests and illnesses like rust and remove any dead leaves or wilting blossoms. Only zonal pelargoniums are impacted by this, but it is becoming more widespread. It arrived in the nation for the first time in 1968, and it does best in the moist summer or fall months. Fortunately, it doesn’t seem to spread to the plants quickly and is simple to treat, so merely plucking the afflicted leaves is an effective management. You might also consider using the fungicide Dithane 945 as a spray.
- Placing your overwintering plants somewhere bright and sunny will help them retain their need for light throughout the winter. Your plants will receive 50% less light if they are placed more than three feet from a window!
- Because your plants continue to thrive throughout the winter, keep the roots moist. While geraniums frequently survive droughts, they rarely flourish. Show plant growers take special care to keep the roots of their plants damp but never soggy during the winter.
- Ventilate as frequently as you can to maintain a dry environment surrounding your plants. Your plants will turn into a moldy, rotting heap if you don’t allow the air to circulate. The greatest electric fan heaters are those that operate automatically since they circulate air while simultaneously raising air temperature.
- Geraniums are fairly inexpensive to overwinter in the greenhouse because they only need to be kept frost-free. To keep temperatures above freezing, however, we do advise utilizing a heater. Set the thermostat on your heater to 5C, which is 41F. The plant will not survive if the stems become frosty! The winter months are a great time to store your delicate pelargoniums in porches, sunrooms, or conservatories.
We hope that we have provided you with enough of tips so that you can continue to enjoy your geraniums year after year. Visit our geraniums hub page, which is brimming with useful resources, for additional details on how to cultivate and take care of these well-liked plants. And do get in touch with us through our social media outlets to share your personal favorites; we’d love to hear from you.
Can I store my geraniums for the following season?
Amazingly, annual geraniums (Pelargonium hybrids) thrive and flower wonderfully from spring till frost with little effort. The next spring, these resilient tiny plants will take off and grow once more if you dig them out in the fall and store them in a cardboard box or paper bag for the winter. Learn how to preserve your geraniums over the winter so you can enjoy them year after year by watching our video and reading the article below.
How should I care for geraniums in the winter?
Geraniums have the advantage of easily entering dormancy, allowing for storage in a manner akin to that of sensitive bulbs. This method of storing geraniums for the winter entails digging the plant up in the fall and carefully removing the soil from the roots. The roots should not be spotless, just clear of dirt clumps.
In a room with a constant temperature of roughly 50 degrees Fahrenheit, such as your garage or basement, hang the plants upside down (10 C.). Rehang the geranium plant after soaking the roots in water for an hour once a month. All of the leaves on the geranium will fall off, but the stems will still be alive. Replant the dormant geraniums in the ground in the spring, and they will come to life.
When should geraniums be removed from winter storage?
Iowa’s AMES
Beautiful plants like geraniums offer color and life to any landscape. They are not prepared to endure the hard winter weather, though. Geraniums can be brought indoors to overwinter and then replanted in the spring.
Horticulturists at ISU Extension and Outreach can assist with your inquiries regarding overwintering geraniums and how to keep them healthy during winter weather.
How can I overwinter geraniums indoors?
By obtaining cuttings, potting up individual plants, or preserving bare-root plants in a cool, dry place, geraniums can be overwintered indoors. Before the first fall frost, remove plants from the garden (or take cuttings).
How do you take geranium cuttings?
Take three- to four-inch stem cuttings from the terminal ends of the shoots using a sharp knife. Pinch the bottom leaves off each cutting before dipping the base in a rooting hormone. Insert the cuttings into vermiculite or a mix of perlite and sphagnum peat moss as a rooting media. Rooting containers that have drainage holes on the bottom are pots and flats. Just enough to allow the cuttings to support themselves should be inserted into the media. Water the rooting media once all of the cuttings have been placed.
Place a clear plastic bag or dome over the cuttings to stop the plant foliage from wilting after allowing the medium to drain for a few minutes. The cuttings should then be placed under bright light—not direct sunshine. In six to eight weeks, the cuttings should begin to root. Remove the cuttings from the rooting media after they have healthy root systems and plant each rooted cutting in a separate pot. Until spring, keep the potted plants in a window with natural light or under artificial lighting.
How do you overwinter geraniums as potted plants?
Each plant should be dug up carefully and put in a big pot. After giving each plant plenty of water, set the geraniums in a window with natural or artificial light. Geraniums prefer a cool environment indoors. The ideal temperature range is between 60 and 65 degrees Fahrenheit during the day and a little bit lower at night. Plants need watering around every two weeks. By the end of winter, geraniums are likely to grow tall and lanky. Trim the plants back in March. Reduce the geraniums by a third to a half. Within a few days, the geraniums will start to grow once more, and by May, they should be beautiful specimens.
How do you overwinter geraniums as bare-root plants?
The geraniums should be carefully dug out before the first fall frost. Remove the plant’s roots’ soil by shaking them. After that, put one or two plants in a sizable paper bag and keep it dry and cool (45 to 50 degrees Fahrenheit). It might be appropriate to use an indoor porch or an unheated bedroom. Hanging the plants upside-down in a cool, dry area is an another (somewhat messier) option. Eventually, the leaves and the shoot tips will wither away.
Trim or prune each plant in March. Get rid of all the dried-out, lifeless stuff. Return to firm, green, living stem tissue through pruning. After pruning, pot the plants and give them plenty of water. Put the potted geraniums in a window with natural light or next to a light source. March pruning and potting of geraniums should result in lovely plants that may be put outside in May.