For a variety of reasons, including protection, adding winter interest, and assisting local animals, a few common perennials should be left in place all winter.
Plants to Cut Back In Spring:
- yearly wildflowers Leaving annual wildflowers like sunflowers, zinnias, or cosmos up through the winter encourages them to set seed and return the following year. Cut them back and leave the debris on the ground if you can’t bear to leave them up (or if you live in a HOA and are required to do so). For the following season, this ought to assist them scatter some seeds.
- To draw and feed birds throughout the winter, Echinacea (Coneflower) and Rudbeckia (Black Eyed Susan) should be left up until April.
- To provide height and interest, Sedum and ornamental grasses should be left in place all winter.
- As the foliage helps to shield their crowns, Butterfly Weed (Asclepias), Ferns, and Heuchera (Coral Bells) should be left till spring.
Depending on the variety, hydrangeas can either be clipped in the late winter/early spring or right after they have stopped blooming. Hydrangeas that flower on older growth, such as “Endless Summer,” should be clipped as soon as the flowers have faded. It is best to prune hydrangeas that bloom on new growth in the late winter or early spring, such as the well-known “Annabelle” and “Limelight.” This is why it’s wise to keep plant tags or make a list of the different types you have in your yard.
Even though it might occasionally feel overwhelming, fall cleanup can be completed in a matter of hours if you have all the necessary knowledge at your disposal.
How can I get my zinnias ready for the winter?
Zinnia should be planted in the spring, starting indoors if it’s too chilly outside, whether in a flower bed in your garden, a container, or a garden box.
Sowing zinnia
If temperatures have not yet above 65F, the zinnia flower must be planted in a protected area due to its fear of the cold (18C).
- In a greenhouse where the temperature is at least 60F, sowing takes place in March (15C).
- Starting in the month of May, seeds can be planted directly in the ground.
- Starting in May, plant your seedlings in the ground, leaving 8 to 12 inches (20 to 30 cm) between each plant.
You are completely able to gather Zinnia seeds from withered blooms and keep them dry over the winter in a paper envelope. In this manner, you can plant them the next year.
Planting zinnia
Wait until mid-May to plant your zinnia plants after you have prepared your seedlings in nursery pots or if you ever bought ready-grown plants in a horticulture store.
- The warmest area of your garden belongs to zinnias because they enjoy the sun.
- Combine special flower plant soil with garden dirt.
- Depending on the kind, place each zinnia 8 to 12 inches (20 to 40 cm) apart.
- ample water.
In the winter, should zinnias be pruned back?
Multiple flowers will sprout when two medium-sized stems are cut together. Just follow one stem down and see whether it links to another.
To encourage bushier growth, remove the two stems at their point of union. Since zinnias are annual plants, you must transplant them after they have blossomed.
You can also let the plant to produce its final season’s worth of blossoms and let them release their seeds before withering.
Check your plant carefully for any discolored or fading flowers. This is just another indication that your zinnia needs to be pruned.
When your plant is young, you should pinch it back to encourage future long stem growth. The secret to bright, bushy blooms is deadheading.
Your Zinnia plant will grow closer to the ground if the lowest stems are pruned. However, your Zinnia will grow taller from the ground if you cut the higher stems.
Since zinnias are hardy, it won’t really matter whether you prune them lower or higher from the ground.
watering
The plants zinnias are thirsty. During dry conditions, give them a thorough soaking at the roots once a week. Pay close attention to zinnias in pots and keep an eye out for signs that the compost is beginning to dry up; in hot weather, this can happen every day.
fertilising
Feed zinnias with a liquid feed throughout the summer, especially if they are in containers. Do this about 4-6 weeks after planting, or after the compost’s fertiliser has mostly depleted.
staking
The best way to support plants is with individual stakes. Use pea or jute netting to cover young plants and support it between bamboo or hazel canes if they are being planted in a vegetable or cutting garden for picking. The zinnias are barely supported and will climb up and through the grid. The netting will soon be covered in fresh leaves and foliage.
Staking them correctly is worth the work because they benefit immensely from early straight growth. They will never develop or bloom as effectively when supported vertically as they will if they collapse.
propagating
Zinnias are semi-hardy annuals, thus it is better to start them from seed every year. If the seeds were from a hybrid variety, they might not germinate, but they should still have lovely blossoms. Wait for the flowerhead to fade and dry before gently cutting it off once the seeds have matured. Knock the flowerhead over a piece of paper to let the seeds fall. Remove any petals, let the seeds dry for a few days, and then store them in a paper bag with a label until the next year.
Do zinnias reseed each year?
As annual plants, zinnias do not return year after year. In other words, the flowers go through their full life cycle in a single year.
Because they succumb to frosts so quickly, zinnias are extremely susceptible to them. You must either resow every year or allow some of the zinnia blooms to naturally wither and drop to the ground so that the seeds will naturally germinate in order to have flowers in your garden every year.
To gather and store flower seed for springtime planting:
- Allow the blossoms to wither.
- Cut the blossoms off.
- Shake and massage the seeds carefully while holding a bag below.
- Save in seed packets with labels for planting the next spring or summer.
It’s not too difficult to cultivate zinnias because of how simple and low-maintenance they are, especially considering the reward of the lovely blooms that appear in the late summer.
When the season is through, what do you do with the flowers?
Flower deadheading is quite easy to do. Pinch or remove the flower stem as plants stop blooming when it is below the spent flower and just above the first set of lush, healthy leaves. Repeat with all of the plant’s dead blooms.
Sometimes completely cutting back plants makes it easier to deadhead them. Remove the wasted flowers by shearing off the top few inches (5 to 10 cm) of the plant. Prior to shearing the plant’s top, always carefully inspect plants to make sure that no flower buds are concealed among the wilted blooms. Cut the stem immediately above any fresh buds you may discover.
Make a point of deadheading frequently and early. Deadheading will be considerably simpler if you spend at least a little time each day in the garden. Start early, in the late April when few plants still have their faded blossoms. Deadheading flowers is a tedious task, but it will get easier if you do it a few days a week. However, the unpleasant process of deadheading will be understandably overwhelming if you decide to wait until later in the season, such as early October.
Nothing makes a gardener more than seeing their work come to life with stunning blossoms, and if you practice deadheading throughout the growing season, nature will reward you with a second wave of blooms to appreciate even more.
Which perennials shouldn’t have their stems pruned in the fall?
Protecting perennials is necessary. Garden mums (Chrysanthemum spp.), anise hyssop (Agastache foeniculum), red-hot poker (Kniphofia uvaria), and Montauk daisy are examples of minimally hardy perennials that shouldn’t be reduced in size (Nipponanthemum nipponicum).
When To Cut Back
Perennial plants’ leaves will start to wither as soon as the first mild frosts start to fall on them in the middle to late fall. When this happens, it is the perfect moment to start pruning plants.
The process can start before the entire plant has turned brown or withered. In fact, the entire plant can be cut back once the flowering cycle is finished and the blossoms have gone.
How To Cut Back Perennials
Almost all perennial plants can be pruned back in the same way. Start by trimming the plant to a height of 3 to 5 inches above the earth. Trim off all of the stems and foliage with a good set of pruners or hedge trimmers.
The “sharp” aspect is crucial since, in the fall, many plant leaves and stems can be stringy and difficult to cut if your blades are dull. For this job, hedge trimming shears function incredibly well since they can make big, rapid cuts. (OARA Garden Hedge Shears is the product link.)
There are various benefits to leaving the plant slightly above the ground. First, the plant can get some insulation from the surviving foliage over the winter.
However, keeping the plants above ground also makes it easier for a gardener to identify the locations of perennials. It could be challenging to identify where to put plants and mulch now and in the spring if you cut them all the way to the ground.
Speaking of planting more plants, now is an excellent time to divide any that have outgrown their space. Simply plant the extra seedlings after dividing them to help prepare the beds for the following year. (See How to Quickly Divide Perennials to Generate Free Additional Plants!)
What To Do With The Clippings
The plant matter that is being cut back is ideal for the compost pile as long as it is disease-free. To hasten decomposition, it is a good idea to shred everything before putting it to your pile.
If you don’t have access to a chipper or shredder, just cut up the foliage with your lawnmower before adding it to the pile.
Some Perennials To Not Cut Back
Leaving certain perennials to winter with their spring and summer growth intact is optimal. While some plants’ leaves and wasted bloom heads shield and provide food for wildlife throughout the chilly, desolate winter months, other plants’ development is required for protection.
When it comes to protecting birds and other small creatures throughout the winter, ornamental grasses top the list. For animals, leaving them up is preferable to cutting them back in the fall.
They also do a superb job of bringing interest to the frequently barren winter landscape.
Coneflower, black-eyed susan, and shasta daisy stems and seed heads are frequently left in gardens all winter long to provide food for foraging birds.
And Don’t Cut Back Those Mums!
Always try to preserve as much of the leaves as possible when dealing with garden mums. The plants require the extra foliage to help shield them from the wrath of winter due to their late fall flowering.
Here’s to pruning your landscape’s perennials and healthy, profusely blooming plants the next year!
Can perennials survive the winter in pots?
If you have spent the effort planning, planting, and caring for your perennial container garden during the entire growing season, you probably want to overwinter it. However, other gardeners prefer to treat perennials like annuals and chuck them out once the growing season is finished. Others decide to move their perennials in containers into the garden for the winter before starting again with new plants in the spring. Your decision is yours. Continue reading if you want to try overwintering.
Why do containerized perennials require special treatment to overwinter successfully?
- Perennial plants dislike temperature changes that are stronger above ground than below it.
- The risk of harm is higher when perennials are grown in pots because they are less cold-hardy.
- Remember that your chances of successfully overwintering increase with pot size. This is so that the roots can be protected from freezing and desiccating by a larger volume of soil in a larger pot.
- Perennials typically have an easier time surviving the winter in warmer climates or regions with a consistent, heavy layer of snow cover. It takes more effort to get them to survive the winter in the north and in locations with erratic snow cover.
No of your climate, give containerized perennials a good watering just before the ground freezes so they have a supply on hand for the warm winter months. If overwintering under cover, you can also occasionally add a few handfuls of snow to the top of the container; if the temperature rises sufficiently for it to melt, this will provide the plants extra water.
Despite this, many perennials grown in containers do not make it through the winter because they drown from receiving too much water. The roots sit in water until the soil thaws completely and the water can drain out of the pot via the drainage hole at the bottom when the pot accumulates water at the top but the soil is still frozen at the bottom. Water, especially ice cold water in the winter, is not good for roots to sit in. To prevent this from happening, overwinter your perennials in containers on their sides so that water cannot collect at the top of the pot or overwinter them under cover where they won’t receive much water over the winter or the first few weeks of spring before the soil thaws.
Overwintering Techniques
On the best way to overwinter perennials in containers, there are several different schools of thought. Some of the techniques listed here might be effective in your climate, while others might not. The best approach to figure out what will work for you is to experiment.
- The majority opinion seems to be that burying the entire pot in the ground is the best approach to overwinter perennials grown in containers. The roots are safeguarded in this manner, just as they would be if the plants were genuinely buried in a garden. Just be careful not to keep the pot in the ground for an excessive amount of time in the spring, as this may cause the roots to start growing out of the drainage holes and securing the pot to the earth.
- After the first severe frost, you can overwinter them by putting the pots in a cold frame or an unheated garage for the winter. Don’t overwinter perennials in a greenhouse or another warm location where plants won’t fall dormant because all perennials need a time of dormancy or a cold treatment to blossom.
- If you are overwintering your containers outdoors, arrange them together as closely as you can in a protected spot on the ground. In this manner, the soil’s heat and moisture can be absorbed by the pots. A excellent location is often on the east side of the home. Never store the containers over the winter on a deck, paved area, or any other surface that is elevated from the ground. Perennials in containers that are exposed on higher levels throughout the winter have a poor probability of successfully overwintering.
- The pots will require some form of insulating material to be placed on top of them. Try piling evergreen boughs or leaves on top of the pots, then cover everything with a heavy blanket of snow. Use an insulating blanket designed specifically for this if snowfall is unreliable where you live. For further security, you may also consider wrapping the pots themselves in an insulating material.